C# SqlHelper
發(fā)布日期：2022/8/31 作者：
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using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;
using System.Collections;
using System.Configuration;
using WinDPAPI;
using System.Text;
//如果要獲取連接數(shù)據(jù)連接對象或字符串的話，先要修改SQLHelper類中GetConnSting() 方法中的ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString;才能調(diào)用。
namespace DAL
{
/// <summary>
/// SqlServer數(shù)據(jù)訪問幫助類
/// </summary>
public sealed class SqlHelper
{
#region 私有構(gòu)造函數(shù)和方法
private SqlHelper() { }
/// <summary>
/// 將SqlParameter參數(shù)數(shù)組(參數(shù)值)分配給SqlCommand命令.
/// 這個(gè)方法將給任何一個(gè)參數(shù)分配DBNull.Value;
/// 該操作將阻止默認(rèn)值的使用.
/// </summary>
/// <param name="command">命令名</param>
/// <param name="commandParameters">SqlParameters數(shù)組</param>
private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
{
if (command == null) throw new ArgumentNullException("command");
if (commandParameters != null)
{
foreach (SqlParameter p in commandParameters)
{
if (p != null)
{
// 檢查未分配值的輸出參數(shù),將其分配以DBNull.Value.
if ((p.Direction == ParameterDirection.InputOutput || p.Direction == ParameterDirection.Input) &&
(p.Value == null))
{
p.Value = DBNull.Value;
}
command.Parameters.Add(p);
}
}
}
}
/// <summary>
/// 將DataRow類型的列值分配到SqlParameter參數(shù)數(shù)組.
/// </summary>
/// <param name="commandParameters">要分配值的SqlParameter參數(shù)數(shù)組</param>
/// <param name="dataRow">將要分配給存儲過程參數(shù)的DataRow</param>
private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow)
{
if ((commandParameters == null) || (dataRow == null))
{
return;
}
int i = 0;
// 設(shè)置參數(shù)值
foreach (SqlParameter commandParameter in commandParameters)
{
// 創(chuàng)建參數(shù)名稱,如果不存在,只拋出一個(gè)異常.
if (commandParameter.ParameterName == null ||
commandParameter.ParameterName.Length <= 1)
throw new Exception(
string.Format("請?zhí)峁﹨?shù){0}一個(gè)有效的名稱{1}.", i, commandParameter.ParameterName));
// 從dataRow的表中獲取為參數(shù)數(shù)組中數(shù)組名稱的列的索引.
// 如果存在和參數(shù)名稱相同的列,則將列值賦給當(dāng)前名稱的參數(shù).
if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)
commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];
i++;
}
}
/// <summary>
/// 將一個(gè)對象數(shù)組分配給SqlParameter參數(shù)數(shù)組.
/// </summary>
/// <param name="commandParameters">要分配值的SqlParameter參數(shù)數(shù)組</param>
/// <param name="parameterValues">將要分配給存儲過程參數(shù)的對象數(shù)組</param>
private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
{
if ((commandParameters == null) || (parameterValues == null))
{
return;
}
// 確保對象數(shù)組個(gè)數(shù)與參數(shù)個(gè)數(shù)匹配,如果不匹配,拋出一個(gè)異常.
if (commandParameters.Length != parameterValues.Length)
{
throw new ArgumentException("參數(shù)值個(gè)數(shù)與參數(shù)不匹配.");
}
// 給參數(shù)賦值
for (int i = 0, j = commandParameters.Length; i < j; i++)
{
// If the current array value derives from IDbDataParameter, then assign its Value property
if (parameterValues[i] is IDbDataParameter)
{
IDbDataParameter paramInstance = (IDbDataParameter)parameterValues[i];
if (paramInstance.Value == null)
{
commandParameters[i].Value = DBNull.Value;
}
else
{
commandParameters[i].Value = paramInstance.Value;
}
}
else if (parameterValues[i] == null)
{
commandParameters[i].Value = DBNull.Value;
}
else
{
commandParameters[i].Value = parameterValues[i];
}
}
}
/// <summary>
/// 預(yù)處理用戶提供的命令,數(shù)據(jù)庫連接/事務(wù)/命令類型/參數(shù)
/// </summary>
/// <param name="command">要處理的SqlCommand</param>
/// <param name="connection">數(shù)據(jù)庫連接</param>
/// <param name="transaction">一個(gè)有效的事務(wù)或者是null值</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>
/// <param name="commandText">存儲過程名或都T-SQL命令文本</param>
/// <param name="commandParameters">和命令相關(guān)聯(lián)的SqlParameter參數(shù)數(shù)組,如果沒有參數(shù)為'null'</param>
/// <param name="mustCloseConnection"><c>true</c> 如果連接是打開的,則為true,其它情況下為false.</param>
private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, out bool mustCloseConnection)
{
if (command == null) throw new ArgumentNullException("command");
if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");
// If the provided connection is not open, we will open it
if (connection.State != ConnectionState.Open)
{
mustCloseConnection = true;
connection.Open();
}
else
{
mustCloseConnection = false;
}
// 給命令分配一個(gè)數(shù)據(jù)庫連接.
command.Connection = connection;
// 設(shè)置命令文本(存儲過程名或SQL語句)
command.CommandText = commandText;
// 分配事務(wù)
if (transaction != null)
{
if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
command.Transaction = transaction;
}
// 設(shè)置命令類型.
command.CommandType = commandType;
// 分配命令參數(shù)
if (commandParameters != null)
{
AttachParameters(command, commandParameters);
}
return;
}
#endregion 私有構(gòu)造函數(shù)和方法結(jié)束
#region 數(shù)據(jù)庫連接
/// <summary>
/// 一個(gè)有效的數(shù)據(jù)庫連接字符串
/// </summary>
/// <returns></returns>
public static string GetConnSting()
{
DataProtector dp = new DataProtector(DataProtector.Store.USE_MACHINE_STORE);
byte[] dataToDecrypt = Convert.FromBase64String(ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString);
// Optional entropy parameter is null.
// If entropy was used within the Encrypt method, the same entropy parameter
// must be supplied here
return Encoding.UTF8.GetString(dp.Decrypt(dataToDecrypt, null));
//return ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString;
}
/// <summary>
/// 一個(gè)有效的數(shù)據(jù)庫連接對象
/// </summary>
/// <returns></returns>
public static SqlConnection GetConnection()
{
SqlConnection Connection = new SqlConnection(SqlHelper.GetConnSting());
return Connection;
}
#endregion
#region ExecuteNonQuery命令
/// <summary>
/// 執(zhí)行指定連接字符串,類型的SqlCommand.
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>
/// <param name="commandText">存儲過程名稱或SQL語句</param>
/// <returns>返回命令影響的行數(shù)</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
{
return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定連接字符串,類型的SqlCommand.如果沒有提供參數(shù),不返回結(jié)果.
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>
/// <param name="commandText">存儲過程名稱或SQL語句</param>
/// <param name="commandParameters">SqlParameter參數(shù)數(shù)組</param>
/// <returns>返回命令影響的行數(shù)</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
return ExecuteNonQuery(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執(zhí)行指定連接字符串的存儲過程,將對象數(shù)組的值賦給存儲過程參數(shù),
/// 此方法需要在參數(shù)緩存方法中探索參數(shù)并生成參數(shù).
/// </summary>
/// <remarks>
/// 這個(gè)方法沒有提供訪問輸出參數(shù)和返回值.
/// 示例:
/// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串/param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配到存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回受影響的行數(shù)</returns>
public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果存在參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從探索存儲過程參數(shù)(加載到緩存)并分配給存儲過程參數(shù)數(shù)組.
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)情況下
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>
/// <param name="commandText">T存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connection == null) throw new ArgumentNullException("connection");
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
// Finally, execute the command
int retval = cmd.ExecuteNonQuery();
// 清除參數(shù),以便再次使用.
cmd.Parameters.Clear();
if (mustCloseConnection)
connection.Close();
return retval;
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,將對象數(shù)組的值賦給存儲過程參數(shù).
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值
/// 示例:
/// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù)
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給存儲過程分配參數(shù)值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行帶事務(wù)的SqlCommand.
/// </summary>
/// <remarks>
/// 示例.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="transaction">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回影響的行數(shù)/returns>
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行帶事務(wù)的SqlCommand(指定參數(shù)).
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
// 預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行
int retval = cmd.ExecuteNonQuery();
// 清除參數(shù)集,以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執(zhí)行帶事務(wù)的SqlCommand(指定參數(shù)值).
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值
/// 示例:
/// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回受影響的行數(shù)</returns>
public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteNonQuery方法結(jié)束
#region ExecuteDataset方法
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
{
return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamters參數(shù)數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
// 創(chuàng)建并打開數(shù)據(jù)庫連接對象,操作完成釋放對象.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 調(diào)用指定數(shù)據(jù)庫連接字符串重載方法.
return ExecuteDataset(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,直接提供參數(shù)值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值.
/// 示例:
/// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中檢索存儲過程參數(shù)
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給存儲過程參數(shù)分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,指定存儲過程參數(shù),返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connection == null) throw new ArgumentNullException("connection");
// 預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
// 創(chuàng)建SqlDataAdapter和DataSet.
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
// 填充DataSet.
da.Fill(ds);
cmd.Parameters.Clear();
if (mustCloseConnection)
connection.Close();
return ds;
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,指定參數(shù)值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸入?yún)?shù)和返回值.
/// 示例.:
/// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 比緩存中加載存儲過程參數(shù)
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給存儲過程參數(shù)分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定事務(wù)的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定事務(wù)的命令,指定參數(shù),返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
// 預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 創(chuàng)建 DataAdapter & DataSet
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
da.Fill(ds);
cmd.Parameters.Clear();
return ds;
}
}
/// <summary>
/// 執(zhí)行指定事務(wù)的命令,指定參數(shù)值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸入?yún)?shù)和返回值.
/// 示例.:
/// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">事務(wù)</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù)
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給存儲過程參數(shù)分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteDataset數(shù)據(jù)集命令結(jié)束
#region ExecuteReader 數(shù)據(jù)閱讀器
/// <summary>
/// 枚舉,標(biāo)識數(shù)據(jù)庫連接是由SqlHelper提供還是由調(diào)用者提供
/// </summary>
private enum SqlConnectionOwnership
{
/// <summary>由SqlHelper提供連接</summary>
Internal,
/// <summary>由調(diào)用者提供連接</summary>
External
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的數(shù)據(jù)閱讀器.
/// </summary>
/// <remarks>
/// 如果是SqlHelper打開連接,當(dāng)連接關(guān)閉DataReader也將關(guān)閉.
/// 如果是調(diào)用都打開連接,DataReader由調(diào)用都管理.
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="transaction">一個(gè)有效的事務(wù),或者為 'null'</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParameters參數(shù)數(shù)組,如果沒有參數(shù)則為'null'</param>
/// <param name="connectionOwnership">標(biāo)識數(shù)據(jù)庫連接對象是由調(diào)用者提供還是由SqlHelper提供</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership)
{
if (connection == null) throw new ArgumentNullException("connection");
bool mustCloseConnection = false;
// 創(chuàng)建命令
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 創(chuàng)建數(shù)據(jù)閱讀器
SqlDataReader dataReader;
if (connectionOwnership == SqlConnectionOwnership.External)
{
dataReader = cmd.ExecuteReader();
}
else
{
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
// 清除參數(shù),以便再次使用..
// HACK: There is a problem here, the output parameter values are fletched
// when the reader is closed, so if the parameters are detached from the command
// then the SqlReader can磘 set its values.
// When this happen, the parameters can磘 be used again in other command.
bool canClear = true;
foreach (SqlParameter commandParameter in cmd.Parameters)
{
if (commandParameter.Direction != ParameterDirection.Input)
canClear = false;
}
if (canClear)
{
cmd.Parameters.Clear();
}
return dataReader;
}
catch
{
if (mustCloseConnection)
connection.Close();
throw;
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的數(shù)據(jù)閱讀器.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
{
return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的數(shù)據(jù)閱讀器,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組(new SqlParameter("@prodid", 24))</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
SqlConnection connection = null;
try
{
connection = new SqlConnection(connectionString);
connection.Open();
return ExecuteReader(connection, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal);
}
catch
{
// If we fail to return the SqlDatReader, we need to close the connection ourselves
if (connection != null) connection.Close();
throw;
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的數(shù)據(jù)閱讀器,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的數(shù)據(jù)閱讀器.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名或T-SQL語句</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// [調(diào)用者方式]執(zhí)行指定數(shù)據(jù)庫連接對象的數(shù)據(jù)閱讀器,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandParameters">SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
/// <summary>
/// [調(diào)用者方式]執(zhí)行指定數(shù)據(jù)庫連接對象的數(shù)據(jù)閱讀器,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">T存儲過程名</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// [調(diào)用者方式]執(zhí)行指定數(shù)據(jù)庫事務(wù)的數(shù)據(jù)閱讀器,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// [調(diào)用者方式]執(zhí)行指定數(shù)據(jù)庫事務(wù)的數(shù)據(jù)閱讀器,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
/// <summary>
/// [調(diào)用者方式]執(zhí)行指定數(shù)據(jù)庫事務(wù)的數(shù)據(jù)閱讀器,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteReader數(shù)據(jù)閱讀器
#region ExecuteScalar 返回結(jié)果集中的第一行第一列
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
{
// 執(zhí)行參數(shù)為空的方法
return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,指定參數(shù),返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
// 創(chuàng)建并打開數(shù)據(jù)庫連接對象,操作完成釋放對象.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 調(diào)用指定數(shù)據(jù)庫連接字符串重載方法.
return ExecuteScalar(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,指定參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText)
{
// 執(zhí)行參數(shù)為空的方法
return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,指定參數(shù),返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connection == null) throw new ArgumentNullException("connection");
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行SqlCommand命令,并返回結(jié)果.
object retval = cmd.ExecuteScalar();
// 清除參數(shù),以便再次使用.
cmd.Parameters.Clear();
if (mustCloseConnection)
connection.Close();
return retval;
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,指定參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText)
{
// 執(zhí)行參數(shù)為空的方法
return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,指定參數(shù),返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行SqlCommand命令,并返回結(jié)果.
object retval = cmd.ExecuteScalar();
// 清除參數(shù),以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,指定參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// PPull the parameters for this stored procedure from the parameter cache ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteScalar
#region ExecuteXmlReader XML閱讀器
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText)
{
// 執(zhí)行參數(shù)為空的方法
return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (connection == null) throw new ArgumentNullException("connection");
bool mustCloseConnection = false;
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行命令
XmlReader retval = cmd.ExecuteXmlReader();
// 清除參數(shù),以便再次使用.
cmd.Parameters.Clear();
return retval;
}
catch
{
if (mustCloseConnection)
connection.Close();
throw;
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱 using "FOR XML AUTO"</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
// 執(zhí)行參數(shù)為空的方法
return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行命令
XmlReader retval = cmd.ExecuteXmlReader();
// 清除參數(shù),以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的SqlCommand命令,并產(chǎn)生一個(gè)XmlReader對象做為結(jié)果集返回,指定參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有參數(shù)值
return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteXmlReader 閱讀器結(jié)束
#region FillDataset 填充數(shù)據(jù)集
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)</param>
public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (dataSet == null) throw new ArgumentNullException("dataSet");
// 創(chuàng)建并打開數(shù)據(jù)庫連接對象,操作完成釋放對象.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 調(diào)用指定數(shù)據(jù)庫連接字符串重載方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集.指定命令參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
public static void FillDataset(string connectionString, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (dataSet == null) throw new ArgumentNullException("dataSet");
// 創(chuàng)建并打開數(shù)據(jù)庫連接對象,操作完成釋放對象.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 調(diào)用指定數(shù)據(jù)庫連接字符串重載方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接字符串的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,指定存儲過程參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
public static void FillDataset(string connectionString, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (dataSet == null) throw new ArgumentNullException("dataSet");
// 創(chuàng)建并打開數(shù)據(jù)庫連接對象,操作完成釋放對象.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 調(diào)用指定數(shù)據(jù)庫連接字符串重載方法.
FillDataset(connection, spName, dataSet, tableNames, parameterValues);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
public static void FillDataset(SqlConnection connection, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames)
{
FillDataset(connection, commandType, commandText, dataSet, tableNames, null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
public static void FillDataset(SqlConnection connection, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
FillDataset(connection, null, commandType, commandText, dataSet, tableNames, commandParameters);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫連接對象的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,指定存儲過程參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
public static void FillDataset(SqlConnection connection, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if (connection == null) throw new ArgumentNullException("connection");
if (dataSet == null) throw new ArgumentNullException("dataSet");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
// 沒有參數(shù)值
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
public static void FillDataset(SqlTransaction transaction, CommandType commandType,
string commandText,
DataSet dataSet, string[] tableNames)
{
FillDataset(transaction, commandType, commandText, dataSet, tableNames, null);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,指定參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
public static void FillDataset(SqlTransaction transaction, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);
}
/// <summary>
/// 執(zhí)行指定數(shù)據(jù)庫事務(wù)的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,指定存儲過程參數(shù)值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問存儲過程輸出參數(shù)和返回值參數(shù).
///
/// 示例:
/// FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);
/// </remarks>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="parameterValues">分配給存儲過程輸入?yún)?shù)的對象數(shù)組</param>
public static void FillDataset(SqlTransaction transaction, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (dataSet == null) throw new ArgumentNullException("dataSet");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果有參數(shù)值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給存儲過程參數(shù)賦值
AssignParameterValues(commandParameters, parameterValues);
// 調(diào)用重載方法
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
// 沒有參數(shù)值
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
/// <summary>
/// [私有方法][內(nèi)部調(diào)用]執(zhí)行指定數(shù)據(jù)庫連接對象/事務(wù)的命令,映射數(shù)據(jù)表并填充數(shù)據(jù)集,DataSet/TableNames/SqlParameters.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="transaction">一個(gè)有效的連接事務(wù)</param>
/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>
/// <param name="commandText">存儲過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結(jié)果集的DataSet實(shí)例</param>
/// <param name="tableNames">表映射的數(shù)據(jù)表數(shù)組
/// 用戶定義的表名 (可有是實(shí)際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter參數(shù)數(shù)組</param>
private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
if (connection == null) throw new ArgumentNullException("connection");
if (dataSet == null) throw new ArgumentNullException("dataSet");
// 創(chuàng)建SqlCommand命令,并進(jìn)行預(yù)處理
SqlCommand command = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// 執(zhí)行命令
using (SqlDataAdapter dataAdapter = new SqlDataAdapter(command))
{
// 追加表映射
if (tableNames != null && tableNames.Length > 0)
{
string tableName = "Table";
for (int index = 0; index < tableNames.Length; index++)
{
if (tableNames[index] == null || tableNames[index].Length == 0) throw new ArgumentException("The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames");
dataAdapter.TableMappings.Add(tableName, tableNames[index]);
tableName += (index + 1).ToString();
}
}
// 填充數(shù)據(jù)集使用默認(rèn)表名稱
dataAdapter.Fill(dataSet);
// 清除參數(shù),以便再次使用.
command.Parameters.Clear();
}
if (mustCloseConnection)
connection.Close();
}
#endregion
#region UpdateDataset 更新數(shù)據(jù)集
/// <summary>
/// 執(zhí)行數(shù)據(jù)集更新到數(shù)據(jù)庫,指定inserted, updated, or deleted命令.
/// </summary>
/// <remarks>
/// 示例:
/// UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
/// </remarks>
/// <param name="insertCommand">[追加記錄]一個(gè)有效的T-SQL語句或存儲過程</param>
/// <param name="deleteCommand">[刪除記錄]一個(gè)有效的T-SQL語句或存儲過程</param>
/// <param name="updateCommand">[更新記錄]一個(gè)有效的T-SQL語句或存儲過程</param>
/// <param name="dataSet">要更新到數(shù)據(jù)庫的DataSet</param>
/// <param name="tableName">要更新到數(shù)據(jù)庫的DataTable</param>
public static void UpdateDataset(SqlCommand insertCommand, SqlCommand deleteCommand, SqlCommand updateCommand, DataSet dataSet, string tableName)
{
if (insertCommand == null) throw new ArgumentNullException("insertCommand");
if (deleteCommand == null) throw new ArgumentNullException("deleteCommand");
if (updateCommand == null) throw new ArgumentNullException("updateCommand");
if (tableName == null || tableName.Length == 0) throw new ArgumentNullException("tableName");
// 創(chuàng)建SqlDataAdapter,當(dāng)操作完成后釋放.
using (SqlDataAdapter dataAdapter = new SqlDataAdapter())
{
// 設(shè)置數(shù)據(jù)適配器命令
dataAdapter.UpdateCommand = updateCommand;
dataAdapter.InsertCommand = insertCommand;
dataAdapter.DeleteCommand = deleteCommand;
// 更新數(shù)據(jù)集改變到數(shù)據(jù)庫
dataAdapter.Update(dataSet, tableName);
// 提交所有改變到數(shù)據(jù)集.
dataSet.AcceptChanges();
}
}
#endregion
#region CreateCommand 創(chuàng)建一條SqlCommand命令
/// <summary>
/// 創(chuàng)建SqlCommand命令,指定數(shù)據(jù)庫連接對象,存儲過程名和參數(shù).
/// </summary>
/// <remarks>
/// 示例:
/// SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="sourceColumns">源表的列名稱數(shù)組</param>
/// <returns>返回SqlCommand命令</returns>
public static SqlCommand CreateCommand(SqlConnection connection, string spName, params string[] sourceColumns)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 創(chuàng)建命令
SqlCommand cmd = new SqlCommand(spName, connection);
cmd.CommandType = CommandType.StoredProcedure;
// 如果有參數(shù)值
if ((sourceColumns != null) && (sourceColumns.Length > 0))
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 將源表的列到映射到DataSet命令中.
for (int index = 0; index < sourceColumns.Length; index++)
commandParameters[index].SourceColumn = sourceColumns[index];
// Attach the discovered parameters to the SqlCommand object
AttachParameters(cmd, commandParameters);
}
return cmd;
}
#endregion
#region ExecuteNonQueryTypedParams 類型化參數(shù)(DataRow)
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接字符串的存儲過程,使用DataRow做為參數(shù)值,返回受影響的行數(shù).
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接對象的存儲過程,使用DataRow做為參數(shù)值,返回受影響的行數(shù).
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQueryTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫事物的存儲過程,使用DataRow做為參數(shù)值,返回受影響的行數(shù).
/// </summary>
/// <param name="transaction">一個(gè)有效的連接事務(wù) object</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回影響的行數(shù)</returns>
public static int ExecuteNonQueryTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// Sf the row has values, the store procedure parameters must be initialized
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteDatasetTypedParams 類型化參數(shù)(DataRow)
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接字符串的存儲過程,使用DataRow做為參數(shù)值,返回DataSet.
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet.</returns>
public static DataSet ExecuteDatasetTypedParams(string connectionString, String spName, DataRow dataRow)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
//如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接對象的存儲過程,使用DataRow做為參數(shù)值,返回DataSet.
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet.</returns>
///
public static DataSet ExecuteDatasetTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫事務(wù)的存儲過程,使用DataRow做為參數(shù)值,返回DataSet.
/// </summary>
/// <param name="transaction">一個(gè)有效的連接事務(wù) object</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回一個(gè)包含結(jié)果集的DataSet.</returns>
public static DataSet ExecuteDatasetTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteReaderTypedParams 類型化參數(shù)(DataRow)
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接字符串的存儲過程,使用DataRow做為參數(shù)值,返回DataReader.
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接對象的存儲過程,使用DataRow做為參數(shù)值,返回DataReader.
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫事物的存儲過程,使用DataRow做為參數(shù)值,返回DataReader.
/// </summary>
/// <param name="transaction">一個(gè)有效的連接事務(wù) object</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回包含結(jié)果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteScalarTypedParams 類型化參數(shù)(DataRow)
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接字符串的存儲過程,使用DataRow做為參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接對象的存儲過程,使用DataRow做為參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫事務(wù)的存儲過程,使用DataRow做為參數(shù)值,返回結(jié)果集中的第一行第一列.
/// </summary>
/// <param name="transaction">一個(gè)有效的連接事務(wù) object</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回結(jié)果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteXmlReaderTypedParams 類型化參數(shù)(DataRow)
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫連接對象的存儲過程,使用DataRow做為參數(shù)值,返回XmlReader類型的結(jié)果集.
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執(zhí)行指定連接數(shù)據(jù)庫事務(wù)的存儲過程,使用DataRow做為參數(shù)值,返回XmlReader類型的結(jié)果集.
/// </summary>
/// <param name="transaction">一個(gè)有效的連接事務(wù) object</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="dataRow">使用DataRow作為參數(shù)值</param>
/// <returns>返回XmlReader結(jié)果集對象.</returns>
public static XmlReader ExecuteXmlReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
// 如果row有值,存儲過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從緩存中加載存儲過程參數(shù),如果緩存中不存在則從數(shù)據(jù)庫中檢索參數(shù)信息并加載到緩存中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配參數(shù)值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region 執(zhí)行事務(wù)日志
///// <summary>
///// 執(zhí)行多條SQL語句，實(shí)現(xiàn)數(shù)據(jù)庫事務(wù)。
///// </summary>
///// <param name="SQLStringList">多條SQL語句</param>
//public static bool ExecuteSqlTran(string[] SQLStringList)
//{
// SqlCommand cmd = new SqlCommand();
// SqlConnection Connection = new SqlConnection(GetConnSting());
// cmd.Connection = Connection;
// SqlTransaction tx = Connection.BeginTransaction();
// cmd.Transaction = tx;
// try
// {
// for (int n = 0; n < SQLStringList.Length; n++)
// {
// string strsql = SQLStringList[n].ToString();
// if (strsql.Trim().Length > 1)
// {
// cmd.CommandText = strsql;
// cmd.ExecuteNonQuery();
// }
// }
// tx.Commit();
// return true;
// }
// catch (System.Data.SqlClient.SqlException E)
// {
// tx.Rollback();
// throw new Exception(E.Message);
// }
//}
#endregion
}
/// <summary>
/// SqlHelperParameterCache提供緩存存儲過程參數(shù),并能夠在運(yùn)行時(shí)從存儲過程中探索參數(shù).
/// </summary>
public sealed class SqlHelperParameterCache
{
#region 私有方法,字段,構(gòu)造函數(shù)
// 私有構(gòu)造函數(shù),妨止類被實(shí)例化.
private SqlHelperParameterCache() { }
// 這個(gè)方法要注意
private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());
/// <summary>
/// 探索運(yùn)行時(shí)的存儲過程,返回SqlParameter參數(shù)數(shù)組.
/// 初始化參數(shù)值為 DBNull.Value.
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接</param>
/// <param name="spName">存儲過程名稱</param>
/// <param name="includeReturnValueParameter">是否包含返回值參數(shù)</param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
private static SqlParameter[] DiscoverSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
SqlCommand cmd = new SqlCommand(spName, connection);
cmd.CommandType = CommandType.StoredProcedure;
connection.Open();
// 檢索cmd指定的存儲過程的參數(shù)信息,并填充到cmd的Parameters參數(shù)集中.
SqlCommandBuilder.DeriveParameters(cmd);
connection.Close();
// 如果不包含返回值參數(shù),將參數(shù)集中的每一個(gè)參數(shù)刪除.
if (!includeReturnValueParameter)
{
cmd.Parameters.RemoveAt(0);
}
// 創(chuàng)建參數(shù)數(shù)組
SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count];
// 將cmd的Parameters參數(shù)集復(fù)制到discoveredParameters數(shù)組.
cmd.Parameters.CopyTo(discoveredParameters, 0);
// 初始化參數(shù)值為 DBNull.Value.
foreach (SqlParameter discoveredParameter in discoveredParameters)
{
discoveredParameter.Value = DBNull.Value;
}
return discoveredParameters;
}
/// <summary>
/// SqlParameter參數(shù)數(shù)組的深層拷貝.
/// </summary>
/// <param name="originalParameters">原始參數(shù)數(shù)組</param>
/// <returns>返回一個(gè)同樣的參數(shù)數(shù)組</returns>
private static SqlParameter[] CloneParameters(SqlParameter[] originalParameters)
{
SqlParameter[] clonedParameters = new SqlParameter[originalParameters.Length];
for (int i = 0, j = originalParameters.Length; i < j; i++)
{
clonedParameters[i] = (SqlParameter)((ICloneable)originalParameters[i]).Clone();
}
return clonedParameters;
}
#endregion 私有方法,字段,構(gòu)造函數(shù)結(jié)束
#region 緩存方法
/// <summary>
/// 追加參數(shù)數(shù)組到緩存.
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符串</param>
/// <param name="commandText">存儲過程名或SQL語句</param>
/// <param name="commandParameters">要緩存的參數(shù)數(shù)組</param>
public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");
string hashKey = connectionString + ":" + commandText;
paramCache[hashKey] = commandParameters;
}
/// <summary>
/// 從緩存中獲取參數(shù)數(shù)組.
/// </summary>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符</param>
/// <param name="commandText">存儲過程名或SQL語句</param>
/// <returns>參數(shù)數(shù)組</returns>
public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");
string hashKey = connectionString + ":" + commandText;
SqlParameter[] cachedParameters = paramCache[hashKey] as SqlParameter[];
if (cachedParameters == null)
{
return null;
}
else
{
return CloneParameters(cachedParameters);
}
}
#endregion 緩存方法結(jié)束
#region 檢索指定的存儲過程的參數(shù)集
/// <summary>
/// 返回指定的存儲過程的參數(shù)集
/// </summary>
/// <remarks>
/// 這個(gè)方法將查詢數(shù)據(jù)庫,并將信息存儲到緩存.
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符</param>
/// <param name="spName">存儲過程名</param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
public static SqlParameter[] GetSpParameterSet(string connectionString, string spName)
{
return GetSpParameterSet(connectionString, spName, false);
}
/// <summary>
/// 返回指定的存儲過程的參數(shù)集
/// </summary>
/// <remarks>
/// 這個(gè)方法將查詢數(shù)據(jù)庫,并將信息存儲到緩存.
/// </remarks>
/// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫連接字符.</param>
/// <param name="spName">存儲過程名</param>
/// <param name="includeReturnValueParameter">是否包含返回值參數(shù)</param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
{
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
using (SqlConnection connection = new SqlConnection(connectionString))
{
return GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);
}
}
/// <summary>
/// [內(nèi)部]返回指定的存儲過程的參數(shù)集(使用連接對象).
/// </summary>
/// <remarks>
/// 這個(gè)方法將查詢數(shù)據(jù)庫,并將信息存儲到緩存.
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接字符</param>
/// <param name="spName">存儲過程名</param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName)
{
return GetSpParameterSet(connection, spName, false);
}
/// <summary>
/// [內(nèi)部]返回指定的存儲過程的參數(shù)集(使用連接對象)
/// </summary>
/// <remarks>
/// 這個(gè)方法將查詢數(shù)據(jù)庫,并將信息存儲到緩存.
/// </remarks>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名</param>
/// <param name="includeReturnValueParameter">
/// 是否包含返回值參數(shù)
/// </param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if (connection == null) throw new ArgumentNullException("connection");
using (SqlConnection clonedConnection = (SqlConnection)((ICloneable)connection).Clone())
{
return GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);
}
}
/// <summary>
/// [私有]返回指定的存儲過程的參數(shù)集(使用連接對象)
/// </summary>
/// <param name="connection">一個(gè)有效的數(shù)據(jù)庫連接對象</param>
/// <param name="spName">存儲過程名</param>
/// <param name="includeReturnValueParameter">是否包含返回值參數(shù)</param>
/// <returns>返回SqlParameter參數(shù)數(shù)組</returns>
private static SqlParameter[] GetSpParameterSetInternal(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if (connection == null) throw new ArgumentNullException("connection");
if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
string hashKey = connection.ConnectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");
SqlParameter[] cachedParameters;
cachedParameters = paramCache[hashKey] as SqlParameter[];
if (cachedParameters == null)
{
SqlParameter[] spParameters = DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);
paramCache[hashKey] = spParameters;
cachedParameters = spParameters;
}
return CloneParameters(cachedParameters);
}
#endregion 參數(shù)集檢索結(jié)束
}
}
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