求一个比较牛X的DBhelper类,我的DBHelper好像有点问题,可能有些连接没有关闭,所以现在程序运行不稳定,时常报错,报错一般都是 未将对象引用到对象实例 ,我想可能是数据连接出了问题,现在求一个比较好的DBHelper。
private static SqlConnection connection;
public static SqlConnection Connection
{
get
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
if (connection == null)
{
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Closed)
{
connection.Dispose();
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Broken)
{
CloseCommection();
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Open)
{
return connection;
}
else
{
CloseCommection();
connection = new SqlConnection(connectionString);
connection.Open();
}
return connection;
}
}
public static void CloseCommection()
{
if (connection != null)
{
try
{
connection.Close();
}
finally
{
connection.Dispose();
}
}
}
/// <summary>
/// 执行增删改操作,返回受影响行数
///
public static int ExecuteCommand(string safeSql)
{
int result=0;
try
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
result = cmd.ExecuteNonQuery(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行增删改操作,返回受影响行数
/// <returns></returns>
public static int ExecuteCommand(string sql, params SqlParameter[] values)
{
int result =0;
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
result = cmd.ExecuteNonQuery(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的Object值
/// <returns></returns>
public static Object GetScalar(string sql, params SqlParameter[] values)
{
Object result=null;
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
result = cmd.ExecuteScalar(); CloseCommection();
return result;
}
catch(Exception)
{
return null;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的Object值
/// </summary>
public static Object GetScalarInt(string sql, params SqlParameter[] values)
{
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
object objResult = cmd.ExecuteScalar(); CloseCommection();
return objResult;
}
catch (Exception)
{
}
}
/// <summary>
/// 执行查询操作,返回DataReader
/// </summary>
public static SqlDataReader GetReader(string safeSql)
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection
return reader;
}
/// <summary>
/// 执行查询操作,返回DataReader
/// </summary>
public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection;
return reader;
}
/// <summary>
/// 执行查询操作,返回DataTable
/// </summary>
public static DataTable GetDataTable(string safeSql)
{
SqlCommand cmd = null;
DataSet ds = null;
try
{
ds = new DataSet();
cmd = new SqlCommand(safeSql, Connection);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "cs"); CloseCommection();
return ds.Tables["cs"];
}
catch (Exception)
{
return null;
}
} /// <summary>
/// 执行查询操作,返回DataTable
/// </summary>
public static DataTable GetDataTable(string sql, params SqlParameter[] values)
{
DataSet ds =null;
SqlCommand cmd =null;
try
{
ds = new DataSet();
cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "ds"); CloseCommection();
return ds.Tables["cs"];
}
catch (Exception)
{
return null ;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的String值
/// </summary>
public static string ReturnStringScalar(string safeSql)
{
string result=string.Empty;
try
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
result = cmd.ExecuteScalar().ToString(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行查询操作,返回DataSet
/// </summary>
public static DataSet GetDataSet(string sql)
{
DataSet ds = new DataSet();
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "cs"); CloseCommection();
return ds;
}
catch (Exception)
{
return null;
}
}
private static SqlConnection connection;
public static SqlConnection Connection
{
get
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
if (connection == null)
{
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Closed)
{
connection.Dispose();
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Broken)
{
CloseCommection();
connection = new SqlConnection(connectionString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Open)
{
return connection;
}
else
{
CloseCommection();
connection = new SqlConnection(connectionString);
connection.Open();
}
return connection;
}
}
public static void CloseCommection()
{
if (connection != null)
{
try
{
connection.Close();
}
finally
{
connection.Dispose();
}
}
}
/// <summary>
/// 执行增删改操作,返回受影响行数
///
public static int ExecuteCommand(string safeSql)
{
int result=0;
try
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
result = cmd.ExecuteNonQuery(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行增删改操作,返回受影响行数
/// <returns></returns>
public static int ExecuteCommand(string sql, params SqlParameter[] values)
{
int result =0;
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
result = cmd.ExecuteNonQuery(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的Object值
/// <returns></returns>
public static Object GetScalar(string sql, params SqlParameter[] values)
{
Object result=null;
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
result = cmd.ExecuteScalar(); CloseCommection();
return result;
}
catch(Exception)
{
return null;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的Object值
/// </summary>
public static Object GetScalarInt(string sql, params SqlParameter[] values)
{
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
object objResult = cmd.ExecuteScalar(); CloseCommection();
return objResult;
}
catch (Exception)
{
}
}
/// <summary>
/// 执行查询操作,返回DataReader
/// </summary>
public static SqlDataReader GetReader(string safeSql)
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection
return reader;
}
/// <summary>
/// 执行查询操作,返回DataReader
/// </summary>
public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
{
SqlCommand cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection;
return reader;
}
/// <summary>
/// 执行查询操作,返回DataTable
/// </summary>
public static DataTable GetDataTable(string safeSql)
{
SqlCommand cmd = null;
DataSet ds = null;
try
{
ds = new DataSet();
cmd = new SqlCommand(safeSql, Connection);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "cs"); CloseCommection();
return ds.Tables["cs"];
}
catch (Exception)
{
return null;
}
} /// <summary>
/// 执行查询操作,返回DataTable
/// </summary>
public static DataTable GetDataTable(string sql, params SqlParameter[] values)
{
DataSet ds =null;
SqlCommand cmd =null;
try
{
ds = new DataSet();
cmd = new SqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "ds"); CloseCommection();
return ds.Tables["cs"];
}
catch (Exception)
{
return null ;
}
}
/// <summary>
/// 执行查询操作,返回第一行第一列的String值
/// </summary>
public static string ReturnStringScalar(string safeSql)
{
string result=string.Empty;
try
{
SqlCommand cmd = new SqlCommand(safeSql, Connection);
result = cmd.ExecuteScalar().ToString(); CloseCommection();
return result;
}
catch (Exception)
{
return result;
}
}
/// <summary>
/// 执行查询操作,返回DataSet
/// </summary>
public static DataSet GetDataSet(string sql)
{
DataSet ds = new DataSet();
try
{
SqlCommand cmd = new SqlCommand(sql, Connection);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds, "cs"); CloseCommection();
return ds;
}
catch (Exception)
{
return null;
}
}
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[email protected] 谢谢
{
//ConnectString
private string conn = string.Empty;
private static string connDefault = System.Configuration.ConfigurationManager.ConnectionStrings["RetailPostgreSql8"].ToString(); public DbHelperPostgreSql(string connectString)
{
conn = connectString;
} /// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <returns>影响的记录数</returns>
public int ExecuteSql(string sqlString)
{
using (NpgsqlConnection connection = new NpgsqlConnection(conn))
{
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
int rowsaffected = 0;
rowsaffected = cmd.ExecuteNonQuery();
return rowsaffected;
}
} /// <summary>
/// 执行SQL语句,Getting a single result value using the NpgsqlCommand.ExecuteScalar() method
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <returns>returning a single result value</returns>
public object ExecuteScalarSql(string sqlString)
{
using (NpgsqlConnection connection = new NpgsqlConnection(conn))
{
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
object result;
result = cmd.ExecuteScalar();
return result;
}
} /// <summary>
/// 默認數據庫連接對象
/// </summary>
public static DbHelperPostgreSql DbHelperPostgreSqlDefault
{
get
{
return new DbHelperPostgreSql(connDefault);
}
} /// <summary>
/// 执行SQL语句,Getting a full result set with NpgsqlCommand.ExecuteReader() method and NpgsqlDataReader
/// 注意:使用完畢後請關閉NpgsqlDataReader!
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <returns>returning a NpgsqlDataReader</returns>
public NpgsqlDataReader ExecuteReaderSql(string sqlString)
{
NpgsqlConnection connection = new NpgsqlConnection(conn);
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
NpgsqlDataReader result;
result = cmd.ExecuteReader();
return result;
} /// <summary>
/// 执行SQL语句,返回一個DataTable
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <returns>返回一個DataTable</returns>
public System.Data.DataTable DataTableSql(string sqlString)
{
NpgsqlConnection connection = new NpgsqlConnection(conn);
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
System.Data.DataTable dt = new System.Data.DataTable();
NpgsqlDataAdapter da = new NpgsqlDataAdapter(cmd);
da.Fill(dt);
return dt;
} /// <summary>
/// 分配查詢參數
/// </summary>
/// <param name="cmd">NpgsqlCommand</param>
/// <param name="cmdParms">NpgsqlParameter[]</param>
private void PrepareCommandParameters(NpgsqlCommand cmd, NpgsqlParameter[] cmdParms)
{
if (cmdParms != null)
{
foreach (NpgsqlParameter parameter in cmdParms)
{
if ((parameter.Direction == System.Data.ParameterDirection.InputOutput || parameter.Direction == System.Data.ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
} /// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <param name="cmdParms">查詢參數</param>
/// <returns>影响的记录数</returns>
public int ExecuteSql(string sqlString, NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(conn))
{
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
PrepareCommandParameters(cmd, cmdParms);
int rowsaffected = 0;
rowsaffected = cmd.ExecuteNonQuery();
return rowsaffected;
}
} /// <summary>
/// 执行SQL语句,Getting a single result value using the NpgsqlCommand.ExecuteScalar() method
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <param name="cmdParms">查詢參數</param>
/// <returns>returning a single result value</returns>
public object ExecuteScalarSql(string sqlString, NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(conn))
{
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
PrepareCommandParameters(cmd, cmdParms);
object result;
result = cmd.ExecuteScalar();
return result;
}
} /// <summary>
/// 执行SQL语句,Getting a full result set with NpgsqlCommand.ExecuteReader() method and NpgsqlDataReader
/// 注意:使用完畢後請關閉NpgsqlDataReader!
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <param name="cmdParms">查詢參數</param>
/// <returns>returning a NpgsqlDataReader</returns>
public NpgsqlDataReader ExecuteReaderSql(string sqlString, NpgsqlParameter[] cmdParms)
{
NpgsqlConnection connection = new NpgsqlConnection(conn);
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
PrepareCommandParameters(cmd, cmdParms);
NpgsqlDataReader result;
result = cmd.ExecuteReader();
return result;
} /// <summary>
/// 执行SQL语句,返回一個DataTable
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <param name="cmdParms">查詢參數</param>
/// <returns>返回一個DataTable</returns>
public System.Data.DataTable DataTableSql(string sqlString, NpgsqlParameter[] cmdParms)
{
NpgsqlConnection connection = new NpgsqlConnection(conn);
NpgsqlCommand cmd = new NpgsqlCommand(sqlString, connection);
PrepareCommandParameters(cmd, cmdParms);
System.Data.DataTable dt = new System.Data.DataTable();
NpgsqlDataAdapter da = new NpgsqlDataAdapter(cmd);
da.Fill(dt);
return dt;
}
}
完全沒有必要用static
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;
/// <summary>
/// SQLHelper 的摘要说明
/// </summary>
public class SQLHelper
{
public SqlConnection myConnection = null;
private readonly string RETURNVALUE = "RETURNVALUE"; /// <summary>
/// 打开数据库连接.
/// </summary>
private void Open()
{
// 打开数据库连接
if (myConnection == null)
{
myConnection = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["SQLCONNECTIONSTRING"].ToString());
}
if (myConnection.State == ConnectionState.Closed)
{
try
{
///打开数据库连接
myConnection.Open();
}
catch (Exception ex)
{
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭已经打开的数据库连接
}
}
}
/// <summary>
/// 关闭数据库连接
/// </summary>
public void Close()
{
///判断连接是否已经创建
if (myConnection != null)
{
///判断连接的状态是否打开
if (myConnection.State == ConnectionState.Open)
{
myConnection.Close();
}
}
}
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
// 确认连接是否已经关闭
if (myConnection != null)
{
myConnection.Dispose();
myConnection = null;
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName)
{
SqlCommand cmd = CreateProcCommand(procName, null);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName, SqlParameter[] prams)
{
SqlCommand cmd = CreateProcCommand(procName, prams);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="dataReader">返回存储过程返回值</param>
public void RunProc(string procName, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateProcCommand(procName, null);
try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataSet">返回DataReader对象</param>
public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateProcCommand(procName, prams);
try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunProc(string procName, ref DataSet dataSet)
{
if (dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(procName, null);
try
{
///读取数据
da.Fill(dataSet);
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunProc(string procName, SqlParameter[] prams, ref DataSet dataSet)
{
if (dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(procName, prams);
try
{
///读取数据
da.Fill(dataSet);
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}
/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <returns>返回值</returns>
public int RunSQL(string cmdText)
{
SqlCommand cmd = CreateSQLCommand(cmdText, null);
int i = 0;
try
{
///执行存储过程
cmd.ExecuteNonQuery();
i = 1;
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
i = 0;
}
finally
{
///关闭数据库的连接
Close();
}
///返回存储过程的参数值
return i;
} /// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回值</returns>
public int RunSQL(string cmdText, SqlParameter[] prams)
{
SqlCommand cmd = CreateSQLCommand(cmdText, prams);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}
/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="dataReader">返回DataReader对象</param>
public void RunSQL(string cmdText, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateSQLCommand(cmdText, null);
try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}
/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <param name="dataReader">返回DataReader对象</param>
public void RunSQL(string cmdText, SqlParameter[] prams, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateSQLCommand(cmdText, prams);
try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}
/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunSQL(string cmdText, ref DataSet dataSet)
{
if (dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateSQLDataAdapter(cmdText, null);
try
{
///读取数据
da.Fill(dataSet);
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}
/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunSQL(string cmdText, SqlParameter[] prams, ref DataSet dataSet)
{
if (dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(cmdText, prams);
try
{
///读取数据
da.Fill(dataSet);
}
catch (Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}
/// <summary>
/// 创建一个SqlCommand对象以此来执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回SqlCommand对象</returns>
private SqlCommand CreateProcCommand(string procName, SqlParameter[] prams)
{
///打开数据库连接
Open();
///设置Command
SqlCommand cmd = new SqlCommand(procName, myConnection);
cmd.CommandType = CommandType.StoredProcedure;
///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
cmd.Parameters.Add(parameter);
}
}
///添加返回参数ReturnValue
cmd.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
///返回创建的SqlCommand对象
return cmd;
}
/// <summary>
/// 创建一个SqlCommand对象以此来执行存储过程
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回SqlCommand对象</returns>
private SqlCommand CreateSQLCommand(string cmdText, SqlParameter[] prams)
{
///打开数据库连接
Open();
///设置Command
SqlCommand cmd = new SqlCommand(cmdText, myConnection);
///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
cmd.Parameters.Add(parameter);
}
}
///添加返回参数ReturnValue
cmd.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
///返回创建的SqlCommand对象
return cmd;
}
/// <summary>
/// 创建一个SqlDataAdapter对象,用此来执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回SqlDataAdapter对象</returns>
private SqlDataAdapter CreateProcDataAdapter(string procName, SqlParameter[] prams)
{
///打开数据库连接
Open();
///设置SqlDataAdapter对象
SqlDataAdapter da = new SqlDataAdapter(procName, myConnection);
da.SelectCommand.CommandType = CommandType.StoredProcedure;
///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
da.SelectCommand.Parameters.Add(parameter);
}
}
///添加返回参数ReturnValue
da.SelectCommand.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
///返回创建的SqlDataAdapter对象
return da;
}
/// <summary>
/// 创建一个SqlDataAdapter对象,用此来执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回SqlDataAdapter对象</returns>
private SqlDataAdapter CreateSQLDataAdapter(string cmdText, SqlParameter[] prams)
{
///打开数据库连接
Open();
///设置SqlDataAdapter对象
SqlDataAdapter da = new SqlDataAdapter(cmdText, myConnection);
///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
da.SelectCommand.Parameters.Add(parameter);
}
}
///添加返回参数ReturnValue
da.SelectCommand.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
///返回创建的SqlDataAdapter对象
return da;
}
/// <summary>
/// 生成存储过程参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <param name="Direction">参数方向</param>
/// <param name="Value">参数值</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
{
SqlParameter param;
///当参数大小为0时,不使用该参数大小值
if (Size > 0)
{
param = new SqlParameter(ParamName, DbType, Size);
}
else
{
///当参数大小为0时,不使用该参数大小值
param = new SqlParameter(ParamName, DbType);
}
///创建输出类型的参数
param.Direction = Direction;
if (!(Direction == ParameterDirection.Output && Value == null))
{
param.Value = Value;
}
///返回创建的参数
return param;
}
/// <summary>
/// 传入输入参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param></param>
/// <param name="Size">参数大小</param>
/// <param name="Value">参数值</param>
/// <returns>新的parameter 对象</returns>
public SqlParameter CreateInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}
/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateOutParam(string ParamName, SqlDbType DbType, int Size)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}
/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateReturnParam(string ParamName, SqlDbType DbType, int Size)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
}
}