|
|
using System;
|
|
|
using System.Collections.Generic;
|
|
|
using System.Text;
|
|
|
using System.Data;
|
|
|
using System.Data.SqlClient;
|
|
|
using System.Collections;
|
|
|
using System.Configuration;
|
|
|
|
|
|
namespace WebSqlHelper
|
|
|
{
|
|
|
/// <summary>
|
|
|
/// 数据库的通用访问代码
|
|
|
/// 此类为抽象类，不允许实例化，在应用时直接调用即可
|
|
|
/// </summary>
|
|
|
public abstract class SqlHelper
|
|
|
{
|
|
|
//获取数据库连接字符串，其属于静态变量且只读，项目中所有文档可以直接使用，但不能修改
|
|
|
public static readonly string ConnectionStringLocalTransaction = ConfigurationManager.ConnectionStrings["DongShengDB"].ConnectionString;
|
|
|
//public static readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.ConnectionStrings["SQLConnString2"].ConnectionString;
|
|
|
//public static readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.ConnectionStrings["SQLConnString3"].ConnectionString;
|
|
|
//public static readonly string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["SQLProfileConnString"].ConnectionString;
|
|
|
// public static readonly string ConnectionStringPrint = ConfigurationManager.ConnectionStrings["DongShengPR"].ConnectionString;
|
|
|
|
|
|
// 哈希表用来存储缓存的参数信息，哈希表可以存储任意类型的参数。
|
|
|
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
|
|
|
|
|
|
private static SqlConnection _sqlConnection;
|
|
|
/// <summary>
|
|
|
///执行一个不需要返回值的SqlCommand命令，通过指定专用的连接字符串。
|
|
|
/// 使用参数数组形式提供参数列表
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">一个有效的数据库连接字符串</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText)
|
|
|
{
|
|
|
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
|
|
|
using (SqlConnection conn = new SqlConnection(connectionString))
|
|
|
{
|
|
|
//通过PrePareCommand方法将参数逐个加入到SqlCommand的参数集合中
|
|
|
PrepareCommand(cmd, conn, null, cmdType, cmdText);
|
|
|
int val = cmd.ExecuteNonQuery();
|
|
|
|
|
|
return val;
|
|
|
}
|
|
|
}
|
|
|
/// <summary>
|
|
|
///执行一个不需要返回值的SqlCommand命令，通过指定专用的连接字符串。
|
|
|
/// 使用参数数组形式提供参数列表
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">一个有效的数据库连接字符串</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
|
|
|
using (SqlConnection conn = new SqlConnection(connectionString))
|
|
|
{
|
|
|
//通过PrePareCommand方法将参数逐个加入到SqlCommand的参数集合中
|
|
|
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
|
|
|
int val = cmd.ExecuteNonQuery();
|
|
|
|
|
|
//清空SqlCommand中的参数列表
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
///执行一条不返回结果的SqlCommand，通过一个已经存在的数据库连接
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="conn">一个现有的数据库连接</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
|
|
|
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
|
|
|
int val = cmd.ExecuteNonQuery();
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条不返回结果的SqlCommand，通过一个已经存在的数据库事物处理
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="trans">一个存在的 sql 事物处理</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
|
|
|
int val = cmd.ExecuteNonQuery();
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
|
|
|
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText)
|
|
|
{
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText);
|
|
|
int val = cmd.ExecuteNonQuery();
|
|
|
return val;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条返回结果集的SqlCommand命令，通过专用的连接字符串。
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">一个有效的数据库连接字符串</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个包含结果的SqlDataReader</returns>
|
|
|
public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
SqlConnection conn = new SqlConnection(connectionString);
|
|
|
|
|
|
// 在这里使用try/catch处理是因为如果方法出现异常，则SqlDataReader就不存在，
|
|
|
//CommandBehavior.CloseConnection的语句就不会执行，触发的异常由catch捕获。
|
|
|
//关闭数据库连接，并通过throw再次引发捕捉到的异常。
|
|
|
try
|
|
|
{
|
|
|
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
|
|
|
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
|
|
|
cmd.Parameters.Clear();
|
|
|
return rdr;
|
|
|
}
|
|
|
catch
|
|
|
{
|
|
|
conn.Close();
|
|
|
throw;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条返回第一条记录第一列的SqlCommand命令，通过专用的连接字符串。
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">一个有效的数据库连接字符串</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个object类型的数据，可以通过 Convert.To{Type}方法转换类型</returns>
|
|
|
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
|
|
|
using (SqlConnection connection = new SqlConnection(connectionString))
|
|
|
{
|
|
|
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
|
|
|
object val = cmd.ExecuteScalar();
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条返回第一条记录第一列的SqlCommand命令，通过已经存在的数据库连接。
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="conn">一个已经存在的数据库连接</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个object类型的数据，可以通过 Convert.To{Type}方法转换类型</returns>
|
|
|
public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
|
|
|
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
|
|
|
object val = cmd.ExecuteScalar();
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条返回第一条记录第一列的SqlCommand命令，通过已经存在的数据库连接。(事务操作)
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="trans">一个存在的 sql 事物处理</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static object ExecuteScalar(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
|
|
|
object val = cmd.ExecuteScalar();
|
|
|
cmd.Parameters.Clear();
|
|
|
return val;
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 缓存参数数组
|
|
|
/// </summary>
|
|
|
/// <param name="cacheKey">参数缓存的键值</param>
|
|
|
/// <param name="cmdParms">被缓存的参数列表</param>
|
|
|
public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
parmCache[cacheKey] = commandParameters;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 获取被缓存的参数
|
|
|
/// </summary>
|
|
|
/// <param name="cacheKey">用于查找参数的KEY值</param>
|
|
|
/// <returns>返回缓存的参数数组</returns>
|
|
|
public static SqlParameter[] GetCachedParameters(string cacheKey)
|
|
|
{
|
|
|
SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
|
|
|
|
|
|
if (cachedParms == null)
|
|
|
return null;
|
|
|
|
|
|
//新建一个参数的克隆列表
|
|
|
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
|
|
|
|
|
|
//通过循环为克隆参数列表赋值
|
|
|
for (int i = 0, j = cachedParms.Length; i < j; i++)
|
|
|
//使用clone方法复制参数列表中的参数
|
|
|
clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
|
|
|
|
|
|
return clonedParms;
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 为执行命令准备参数
|
|
|
/// </summary>
|
|
|
/// <param name="cmd">SqlCommand 命令</param>
|
|
|
/// <param name="conn">已经存在的数据库连接</param>
|
|
|
/// <param name="trans">数据库事物处理</param>
|
|
|
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="cmdText">Command text，T-SQL语句 例如 Select * from Products</param>
|
|
|
/// <param name="cmdParms">返回带参数的命令</param>
|
|
|
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText)
|
|
|
{
|
|
|
|
|
|
//判断数据库连接状态
|
|
|
if (conn.State != ConnectionState.Open)
|
|
|
conn.Open();
|
|
|
|
|
|
cmd.Connection = conn;
|
|
|
cmd.CommandText = cmdText;
|
|
|
|
|
|
//判断是否需要事物处理
|
|
|
if (trans != null)
|
|
|
cmd.Transaction = trans;
|
|
|
|
|
|
cmd.CommandType = cmdType;
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 为执行命令准备参数
|
|
|
/// </summary>
|
|
|
/// <param name="cmd">SqlCommand 命令</param>
|
|
|
/// <param name="conn">已经存在的数据库连接</param>
|
|
|
/// <param name="trans">数据库事物处理</param>
|
|
|
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="cmdText">Command text，T-SQL语句 例如 Select * from Products</param>
|
|
|
/// <param name="cmdParms">返回带参数的命令</param>
|
|
|
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
|
|
|
{
|
|
|
|
|
|
//判断数据库连接状态
|
|
|
if (conn.State != ConnectionState.Open)
|
|
|
conn.Open();
|
|
|
|
|
|
cmd.Connection = conn;
|
|
|
cmd.CommandText = cmdText;
|
|
|
|
|
|
//判断是否需要事物处理
|
|
|
if (trans != null)
|
|
|
cmd.Transaction = trans;
|
|
|
|
|
|
cmd.CommandType = cmdType;
|
|
|
|
|
|
if (cmdParms != null)
|
|
|
{
|
|
|
foreach (SqlParameter parm in cmdParms)
|
|
|
cmd.Parameters.Add(parm);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 事务操作 ADD 2011-4-2 JHQ
|
|
|
/// </summary>
|
|
|
/// <param name="con"></param>
|
|
|
/// <returns></returns>
|
|
|
public static SqlTransaction BeginTransaction(string con)
|
|
|
{
|
|
|
//SqlConnection connection = new SqlConnection(con);
|
|
|
_sqlConnection = new SqlConnection(con);
|
|
|
_sqlConnection.Open();
|
|
|
SqlTransaction tran = _sqlConnection.BeginTransaction();
|
|
|
return tran;
|
|
|
}
|
|
|
|
|
|
#region z
|
|
|
/// <summary>
|
|
|
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
|
|
|
/// the connection string.
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// e.g.:
|
|
|
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">A valid connection string for a SqlConnection</param>
|
|
|
/// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
|
|
|
/// <param name="commandText">The stored procedure name or T-SQL command</param>
|
|
|
/// <returns>A dataset containing the resultset generated by the command</returns>
|
|
|
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
|
|
|
{
|
|
|
DataSet ds = null;
|
|
|
bool mustCloseConnection = false;
|
|
|
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
|
|
|
|
|
|
SqlCommand command = null;
|
|
|
using (SqlConnection connection = new SqlConnection(connectionString))
|
|
|
{
|
|
|
if (connection.State != ConnectionState.Open)
|
|
|
{
|
|
|
mustCloseConnection = true;
|
|
|
connection.Open();
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
mustCloseConnection = false;
|
|
|
}
|
|
|
command = new SqlCommand();
|
|
|
// Associate the connection with the command
|
|
|
command.Connection = connection;
|
|
|
|
|
|
// Set the command text (stored procedure name or SQL statement)
|
|
|
command.CommandText = commandText;
|
|
|
using (SqlDataAdapter da = new SqlDataAdapter(command))
|
|
|
{
|
|
|
ds = new DataSet();
|
|
|
|
|
|
// Fill the DataSet using default values for DataTable names, etc
|
|
|
da.Fill(ds);
|
|
|
|
|
|
// Detach the SqlParameters from the command object, so they can be used again
|
|
|
command.Parameters.Clear();
|
|
|
|
|
|
if (mustCloseConnection)
|
|
|
connection.Close();
|
|
|
}
|
|
|
}
|
|
|
return ds;
|
|
|
}
|
|
|
#endregion
|
|
|
#region z
|
|
|
/// <summary>
|
|
|
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
|
|
|
/// the connection string.
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// e.g.:
|
|
|
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
|
|
|
/// </remarks>
|
|
|
/// <param name="connectionString">A valid connection string for a SqlConnection</param>
|
|
|
/// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
|
|
|
/// <param name="commandText">The stored procedure name or T-SQL command</param>
|
|
|
/// <returns>A dataset containing the resultset generated by the command</returns>
|
|
|
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
DataSet ds = null;
|
|
|
bool mustCloseConnection = false;
|
|
|
if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
|
|
|
|
|
|
SqlCommand command = null;
|
|
|
using (SqlConnection connection = new SqlConnection(connectionString))
|
|
|
{
|
|
|
if (connection.State != ConnectionState.Open)
|
|
|
{
|
|
|
mustCloseConnection = true;
|
|
|
connection.Open();
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
mustCloseConnection = false;
|
|
|
}
|
|
|
command = new SqlCommand();
|
|
|
// Associate the connection with the command
|
|
|
command.Connection = connection;
|
|
|
// Set the command text (stored procedure name or SQL statement)
|
|
|
command.CommandText = commandText;
|
|
|
//通过PrePareCommand方法将参数逐个加入到SqlCommand的参数集合中
|
|
|
PrepareCommand(command, connection, null, commandType, commandText, commandParameters);
|
|
|
|
|
|
using (SqlDataAdapter da = new SqlDataAdapter(command))
|
|
|
{
|
|
|
ds = new DataSet();
|
|
|
|
|
|
// Fill the DataSet using default values for DataTable names, etc
|
|
|
da.Fill(ds);
|
|
|
|
|
|
// Detach the SqlParameters from the command object, so they can be used again
|
|
|
command.Parameters.Clear();
|
|
|
|
|
|
if (mustCloseConnection)
|
|
|
connection.Close();
|
|
|
}
|
|
|
}
|
|
|
return ds;
|
|
|
}
|
|
|
#endregion
|
|
|
public static void CloseConnection()
|
|
|
{
|
|
|
if (_sqlConnection != null)
|
|
|
{
|
|
|
if (_sqlConnection.State == ConnectionState.Open)
|
|
|
{
|
|
|
_sqlConnection.Close();
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 执行一条计算查询结果语句，返回查询结果（object）。
|
|
|
/// </summary>
|
|
|
/// <param name="SQLString">计算查询结果语句</param>
|
|
|
/// <returns>查询结果（object）</returns>
|
|
|
public static object GetSingle(string connectionString, string SQLString)
|
|
|
{
|
|
|
using (SqlConnection connection = new SqlConnection(connectionString))
|
|
|
{
|
|
|
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
|
|
|
{
|
|
|
try
|
|
|
{
|
|
|
connection.Open();
|
|
|
object obj = cmd.ExecuteScalar();
|
|
|
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
|
|
{
|
|
|
return null;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
return obj;
|
|
|
}
|
|
|
}
|
|
|
catch (System.Data.SqlClient.SqlException e)
|
|
|
{
|
|
|
connection.Close();
|
|
|
throw e;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 执行存储过程
|
|
|
/// </summary>
|
|
|
/// <param name="storedProcName">存储过程名</param>
|
|
|
/// <param name="parameters">存储过程参数</param>
|
|
|
/// <param name="tableName">DataSet结果中的表名</param>
|
|
|
/// <returns>DataSet</returns>
|
|
|
public static DataSet RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters, string tableName)
|
|
|
{
|
|
|
using (SqlConnection connection = new SqlConnection(connectionString))
|
|
|
{
|
|
|
DataSet dataSet = new DataSet();
|
|
|
connection.Open();
|
|
|
SqlDataAdapter sqlDA = new SqlDataAdapter();
|
|
|
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
|
|
|
sqlDA.Fill(dataSet, tableName);
|
|
|
connection.Close();
|
|
|
return dataSet;
|
|
|
}
|
|
|
}
|
|
|
/// <summary>
|
|
|
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
|
|
|
/// </summary>
|
|
|
/// <param name="connection">数据库连接</param>
|
|
|
/// <param name="storedProcName">存储过程名</param>
|
|
|
/// <param name="parameters">存储过程参数</param>
|
|
|
/// <returns>SqlCommand</returns>
|
|
|
private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
|
|
|
{
|
|
|
SqlCommand command = new SqlCommand(storedProcName, connection);
|
|
|
command.CommandType = CommandType.StoredProcedure;
|
|
|
foreach (SqlParameter parameter in parameters)
|
|
|
{
|
|
|
if (parameter != null)
|
|
|
{
|
|
|
// 检查未分配值的输出参数,将其分配以DBNull.Value.
|
|
|
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
|
|
|
(parameter.Value == null))
|
|
|
{
|
|
|
parameter.Value = DBNull.Value;
|
|
|
}
|
|
|
command.Parameters.Add(parameter);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return command;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 返回查询结果集 LWP 2012-10-10
|
|
|
/// </summary>
|
|
|
/// <param name="strSql">Sql语句</param>
|
|
|
/// <param name="commandParameters">存储过程参数</param>
|
|
|
/// <returns>结果集</returns>
|
|
|
public static DataSet Query(string strSql, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
return ExecuteDataset(ConnectionStringLocalTransaction, CommandType.Text, strSql, commandParameters);
|
|
|
}
|
|
|
|
|
|
#region ExecuteDataset
|
|
|
/// <summary>
|
|
|
/// 返回查询结果集
|
|
|
/// </summary>
|
|
|
/// <param name="cmdText">Sql语句</param>
|
|
|
/// <returns></returns>
|
|
|
public static DataSet ExecuteDataset(string cmdText)
|
|
|
{
|
|
|
return ExecuteDataset(ConnectionStringLocalTransaction, CommandType.Text, cmdText);
|
|
|
}
|
|
|
#endregion
|
|
|
|
|
|
//-------------------------------------------------------------------------------------------------------------------------------
|
|
|
|
|
|
/// <summary>
|
|
|
/// 直接执行语句返回数据集
|
|
|
/// </summary>
|
|
|
/// <param name="connectionstring">数据库连接字符串</param>
|
|
|
/// <param name="sqltext">查询语句</param>
|
|
|
/// <returns></returns>
|
|
|
public static DataSet OpenSqlDataSet(string connectionstring, string sqltext)
|
|
|
{
|
|
|
SqlConnection Conn = new SqlConnection(connectionstring);
|
|
|
// Conn.ConnectionTimeout=600;
|
|
|
Conn.Open();
|
|
|
SqlDataAdapter MyAdapter = new SqlDataAdapter(sqltext, Conn);
|
|
|
DataSet MyDataSet = new DataSet();
|
|
|
try
|
|
|
{
|
|
|
MyAdapter.SelectCommand.CommandTimeout = 6000;
|
|
|
MyAdapter.Fill(MyDataSet);
|
|
|
Conn.Close();
|
|
|
}
|
|
|
catch
|
|
|
{
|
|
|
MyDataSet = null;
|
|
|
Conn.Close();
|
|
|
}
|
|
|
return MyDataSet;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 直接执行语句返回执行结果true/false
|
|
|
/// </summary>
|
|
|
/// <param name="connectionstring">数据库连接字符串</param>
|
|
|
/// <param name="sqltext">执行语句</param>
|
|
|
/// <returns></returns>
|
|
|
public static bool ExecuteSqlCommand(string connectionstring, string sqltext)
|
|
|
{
|
|
|
bool bRtn;
|
|
|
try
|
|
|
{
|
|
|
SqlConnection Conn = new SqlConnection(connectionstring);
|
|
|
Conn.Open();
|
|
|
SqlTransaction myTrans = Conn.BeginTransaction();
|
|
|
SqlCommand MyCommand = new SqlCommand(sqltext, Conn, myTrans);
|
|
|
MyCommand.CommandTimeout = 6000;
|
|
|
try
|
|
|
{
|
|
|
MyCommand.ExecuteNonQuery();
|
|
|
myTrans.Commit();
|
|
|
Conn.Close();
|
|
|
bRtn = true;
|
|
|
}
|
|
|
catch
|
|
|
{
|
|
|
myTrans.Rollback();
|
|
|
bRtn = false;
|
|
|
}
|
|
|
}
|
|
|
catch { bRtn = false; }
|
|
|
return bRtn;
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 执行一条不返回结果的SqlCommand，通过一个已经存在的数据库事物处理
|
|
|
/// 使用参数数组提供参数
|
|
|
/// </summary>
|
|
|
/// <remarks>
|
|
|
/// 使用示例：
|
|
|
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
|
|
|
/// </remarks>
|
|
|
/// <param name="trans">一个存在的 sql 事物处理</param>
|
|
|
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
|
|
|
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
|
|
|
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
|
|
|
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
|
|
|
public static DataSet ExecuteQueryDataset(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
|
|
|
{
|
|
|
DataSet ds = null;
|
|
|
SqlCommand cmd = new SqlCommand();
|
|
|
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
|
|
|
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
|
|
|
{
|
|
|
ds = new DataSet();
|
|
|
|
|
|
// Fill the DataSet using default values for DataTable names, etc
|
|
|
da.Fill(ds);
|
|
|
|
|
|
// Detach the SqlParameters from the command object, so they can be used again
|
|
|
cmd.Parameters.Clear();
|
|
|
}
|
|
|
return ds;
|
|
|
}
|
|
|
//
|
|
|
}
|
|
|
}
|