sqlHelper类问题
本人下载了一个网站源代码，使用了sqlHelper类，但是使用的sqlHelper.dll而不是sqlHelper.cs
使用了语句sqlHelper.RunProc("Pr_GetUserLogin", paramList, out dr); dr老是为null
我觉得sqlHelper.RunProc肯定是调用了web.config中的appSettings，但可能是和web.config中的appSettings名字不同
所以造成了错误，请问我怎么看sqlHelper.dll中的RunProc函数定义啊
[解决办法]
sqlhelper提供源代码呀。下载看看就可以了。还有sqlHelper.RunProc("Pr_GetUserLogin", paramList, out dr); dr是需要你定义的呀。你不定义当然就是null
[解决办法]
用dll反编译工具
[解决办法]
http://topic.csdn.net/u/20080924/08/01355563-3db6-4e63-a6c3-cf3dfcdab616.html
http://topic.csdn.net/u/20080925/17/647c91c7-bfd6-402a-b6ba-409d8a4d8881.html
[解决办法]
using System.Data;using System.Data.SqlClient;using System.Configuration;using System.ComponentModel;namespace SQLHelper{ /// <summary> /// SQLHelper类封装对SQL Server数据库的添加、删除、修改和选择等操作 /// </summary> public class SQLHelper { /// 连接数据源 private 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(ConfigurationManager.ConnectionStrings["gzma03578ConnectionString"].ConnectionString); } 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; }
[解决办法]
/// <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(); } } /// <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); 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; }
[解决办法]
[code=C#]/// <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();
}
}
code]
[解决办法]
很明显是调用了存储过程"Pr_GetUserLogin",你到数据库中找一下有没有这个存储过程吧.
sqlHelper.RunProc("Pr_GetUserLogin", paramList, out dr)
"Pr_GetUserLogin" ----存储过程
paramList --------传入参数列表
out dr -------应该是返回一个DataReader