发布一个操作oracle的c#类

说明，这个好用

要在引入处自己加入System.Data.OracleClient

 

using System;
using System.Data;
using System.Data.OracleClient;
using System.Web.UI.WebControls; namespace SiFenManager.Util
{
/// <summary>
/// 数据库通用操作类
/// </summary>
public class Database
{
protected  OracleConnection con;//连接对象

public Database()
{
con=new OracleConnection(DafangFramework.AppConfig.DataBaseConnectionString);
}
public Database(string constr)
{
con=new OracleConnection(constr);
}
#region 打开数据库连接
/// <summary>
/// 打开数据库连接
/// </summary>
  private  void Open()
{
//打开数据库连接
   if(con.State==ConnectionState.Closed)
{
try
{
//打开数据库连接
     con.Open();
}
catch(Exception e)
{
throw e;
}
}
}
#endregion
#region 关闭数据库连接
/// <summary>
/// 关闭数据库连接
/// </summary>
  private  void Close()
{
//判断连接的状态是否已经打开
   if(con.State==ConnectionState.Open)
{
con.Close();
}
}
#endregion
#region 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对OracleDataReader进行Close )
/// <summary>
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对OracleDataReader进行Close )
/// </summary>
/// <param name="sql">查询语句</param>
/// <returns>OracleDataReader</returns>  
  public  OracleDataReader ExecuteReader(string sql)
{
OracleDataReader myReader;
Open();
OracleCommand cmd = new OracleCommand(sql, con);
myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
#endregion
#region 执行带参数的SQL语句  
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="sql">SQL语句</param>
/// <returns>影响的记录数</returns>  
  public  int ExecuteSql(string sql, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
{
try
{
PrepareCommand(cmd, con, null, sql, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.OracleClient.OracleException e)
{
throw e;
}
}
}
#endregion

#region 执行带参数的SQL语句   /// <summary>/// 执行不带参数的SQL语句/// </summary>/// <param name="sql">SQL语句</param>       public  void ExecuteSql(string sql){OracleCommand cmd = new OracleCommand(sql,con);try{Open();cmd.ExecuteNonQuery();Close();}catch (System.Data.OracleClient.OracleException e){Close();throw e;}}#endregion#region 执行SQL语句，返回数据到DataSet中/// <summary>/// 执行SQL语句，返回数据到DataSet中/// </summary>/// <param name="sql">sql语句</param>/// <returns>返回DataSet</returns>  public  DataSet GetDataSet(string sql){DataSet ds=new DataSet();try{Open();//打开数据连接    OracleDataAdapter adapter=new OracleDataAdapter(sql,con);adapter.Fill(ds);}catch//(Exception ex)   {}finally{Close();//关闭数据库连接   }return ds;}#endregion#region 执行SQL语句，返回数据到自定义DataSet中/// <summary>/// 执行SQL语句，返回数据到DataSet中/// </summary>/// <param name="sql">sql语句</param>/// <param name="DataSetName">自定义返回的DataSet表名</param>/// <returns>返回DataSet</returns>  public  DataSet GetDataSet(string sql,string DataSetName){DataSet ds=new DataSet();Open();//打开数据连接   OracleDataAdapter adapter=new OracleDataAdapter(sql,con);adapter.Fill(ds,DataSetName);Close();//关闭数据库连接   return ds;}#endregion#region 执行Sql语句,返回带分页功能的自定义dataset/// <summary>/// 执行Sql语句,返回带分页功能的自定义dataset/// </summary>/// <param name="sql">Sql语句</param>/// <param name="PageSize">每页显示记录数</param>/// <param name="CurrPageIndex">当前页</param>/// <param name="DataSetName">返回dataset表名</param>/// <returns>返回DataSet</returns>  public  DataSet GetDataSet(string sql,int PageSize,int CurrPageIndex,string DataSetName){DataSet ds=new DataSet();Open();//打开数据连接   OracleDataAdapter adapter=new OracleDataAdapter(sql,con);adapter.Fill(ds,PageSize * (CurrPageIndex - 1), PageSize,DataSetName);Close();//关闭数据库连接   return ds;}#endregion#region 执行SQL语句，返回记录总数/// <summary>/// 执行SQL语句，返回记录总数/// </summary>/// <param name="sql">sql语句</param>/// <returns>返回记录总条数</returns>  public  int GetRecordCount(string sql){int recordCount = 0;Open();//打开数据连接   OracleCommand command = new OracleCommand(sql,con);OracleDataReader dataReader = command.ExecuteReader();while(dataReader.Read()){recordCount++;}dataReader.Close();Close();//关闭数据库连接   return recordCount;}#endregion

#region 统计某表记录总数 /// <summary>/// 统计某表记录总数/// </summary>/// <param name="KeyField">主键/索引键</param>/// <param name="TableName">数据库.用户名.表名</param>/// <param name="Condition">查询条件</param>/// <returns>返回记录总数</returns>   public  int GetRecordCount(string keyField, string tableName, string condition){int RecordCount = 0;string sql = "select count(" + keyField + ") as count from " + tableName + " " + condition;DataSet ds = GetDataSet(sql);if (ds.Tables[0].Rows.Count > 0){RecordCount =Convert.ToInt32(ds.Tables[0].Rows[0][0]);}ds.Clear();ds.Dispose();return RecordCount;}/// <summary>/// 统计某表记录总数/// </summary>/// <param name="Field">可重复的字段</param>/// <param name="tableName">数据库.用户名.表名</param>/// <param name="condition">查询条件</param>/// <param name="flag">字段是否主键</param>/// <returns>返回记录总数</returns>   public  int GetRecordCount(string Field, string tableName, string condition, bool flag){int RecordCount = 0;if (flag){RecordCount = GetRecordCount(Field, tableName, condition);}else{string sql = "select count(distinct(" + Field + ")) as count from " + tableName + " " + condition;DataSet ds = GetDataSet(sql);if (ds.Tables[0].Rows.Count > 0){RecordCount = Convert.ToInt32(ds.Tables[0].Rows[0][0]);}ds.Clear();ds.Dispose();}return RecordCount;}#endregion#region 统计某表分页总数 /// <summary>/// 统计某表分页总数/// </summary>/// <param name="keyField">主键/索引键</param>/// <param name="tableName">表名</param>/// <param name="condition">查询条件</param>/// <param name="pageSize">页宽</param>/// <param name="RecordCount">记录总数</param>/// <returns>返回分页总数</returns>   public  int GetPageCount(string keyField, string tableName, string condition, int pageSize, int RecordCount){int PageCount = 0;PageCount = (RecordCount % pageSize) > 0 ? (RecordCount / pageSize) + 1 : RecordCount / pageSize;if (PageCount < 1) PageCount = 1;return PageCount;}/// <summary>/// 统计某表分页总数/// </summary>/// <param name="keyField">主键/索引键</param>/// <param name="tableName">表名</param>/// <param name="condition">查询条件</param>/// <param name="pageSize">页宽</param>/// <returns>返回页面总数</returns>   public  int GetPageCount(string keyField, string tableName, string condition, int pageSize, ref int RecordCount){RecordCount = GetRecordCount(keyField, tableName, condition);return GetPageCount(keyField, tableName, condition, pageSize, RecordCount);}/// <summary>/// 统计某表分页总数/// </summary>/// <param name="Field">可重复的字段</param>/// <param name="tableName">表名</param>/// <param name="condition">查询条件</param>/// <param name="pageSize">页宽</param>/// <param name="flag">是否主键</param>/// <returns>返回页页总数</returns>   public  int GetPageCount(string Field, string tableName, string condition, ref int RecordCount, int pageSize, bool flag){RecordCount = GetRecordCount(Field, tableName, condition, flag);return GetPageCount(Field, tableName, condition, pageSize, ref RecordCount);}#endregion 

#region Sql分页函数 /// <summary>/// 构造分页查询SQL语句/// </summary>/// <param name="KeyField">主键</param>/// <param name="FieldStr">所有需要查询的字段(field1,field2...)</param>/// <param name="TableName">库名.拥有者.表名</param>/// <param name="where">查询条件1(where ...)</param>/// <param name="order">排序条件2(order by ...)</param>/// <param name="CurrentPage">当前页号</param>/// <param name="PageSize">页宽</param>/// <returns>SQL语句</returns>   public  string JoinPageSQL(string KeyField, string FieldStr, string TableName, string Where, string Order, int CurrentPage, int PageSize){string sql = null;if (CurrentPage == 1){sql = "select  " + CurrentPage * PageSize + " " + FieldStr + " from " + TableName + " " + Where + " " + Order + " ";}else{sql = "select * from (";sql += "select  " + CurrentPage * PageSize + " " + FieldStr + " from " + TableName + " " + Where + " " + Order + ") a ";sql += "where " + KeyField + " not in (";sql += "select  " + (CurrentPage - 1) * PageSize + " " + KeyField + " from " + TableName + " " + Where + " " + Order + ")";}return sql;}/// <summary>/// 构造分页查询SQL语句/// </summary>/// <param name="Field">字段名(非主键)</param>/// <param name="TableName">库名.拥有者.表名</param>/// <param name="where">查询条件1(where ...)</param>/// <param name="order">排序条件2(order by ...)</param>/// <param name="CurrentPage">当前页号</param>/// <param name="PageSize">页宽</param>/// <returns>SQL语句</returns>   public  string JoinPageSQL(string Field, string TableName,string Where, string Order, int CurrentPage, int PageSize){string sql = null;if (CurrentPage == 1){sql = "select rownum " + CurrentPage * PageSize + " " + Field + " from " + TableName + " " + Where + " " + Order + " group by " + Field;}else{sql = "select * from (";sql += "select rownum " + CurrentPage * PageSize + " " + Field + " from " + TableName + " " + Where + " " + Order + " group by " + Field + " ) a ";sql += "where " + Field + " not in (";sql += "select rownum " + (CurrentPage - 1) * PageSize + " " + Field + " from " + TableName + " " + Where + " " + Order + " group by " + Field + ")";}return sql;}#endregion#region 根据系统时间动态生成各种查询语句(现已经注释掉，以备以后使用)//  #region 根据查询时间的条件，动态生成查询语句//  /// <summary>//  /// 根据查询时间的条件，动态生成查询语句//  /// </summary>//  /// <param name="starttime">开始时间</param>//  /// <param name="endtime">结束时间</param>//  /// <param name="dw">单位</param>//  /// <param name="startxsl">开始线损率</param>//  /// <param name="endxsl">结束线损率</param>//  /// <param name="danwei">单位字段</param>//  /// <param name="xiansunlv">线损率字段</param>//  /// <param name="tablehz">表后缀</param>//  /// <returns>SQL语句</returns>//  public  string SQL(DateTime starttime,DateTime endtime,string dw,float startxsl,float endxsl,string danwei,string xiansunlv,string tablehz)//  {////   string sql=null;//   //将输入的时间格式转换成固定的格式"yyyy-mm-dd"//   string zstarttime=starttime.GetDateTimeFormats('D')[1].ToString();//   string zendtime=endtime.GetDateTimeFormats('D')[1].ToString();//   string nTime=DateTime.Now.GetDateTimeFormats('D')[1].ToString();//////   //取日期值的前六位，及年月值//   string sTime=zstarttime.Substring(0,4)+zstarttime.Substring(5,2);//   string eTime=zendtime.Substring(0,4)+zendtime.Substring(5,2);//   string nowTime=nTime.Substring(0,4)+nTime.Substring(5,2);//   //分别取日期的年和月//   int sy=Convert.ToInt32(zstarttime.Substring(0,4));//   int ey=Convert.ToInt32(zendtime.Substring(0,4));//   int sm=Convert.ToInt32(zstarttime.Substring(5,2));//   int em=Convert.ToInt32(zendtime.Substring(5,2));//   //相关变量定义//   int s;//   int e;//   int i;//   int j;//   int js;//   int nz;//   string x;//   //一，取当前表生成SQL语句//   if(sTime==nowTime&&eTime==nowTime)//   {//    sql="select  * from "+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" ";//   }//    //二，取当前表和其他表生成SQL语句//   else if(sTime==nowTime&&eTime!=nowTime)//   {//    sql="select  * from "+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//    //如果年份相等//    if(sy==ey)//    {//     s=Convert.ToInt32(sTime);//     e=Convert.ToInt32(eTime);//     for(i=s+1;i<e;i++)//     {//      i=i++;//      sql+="select  * from "+i.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//     }//     sql+="select  * from "+e.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" ";//    }//     //结束年份大于开始年份//    else//    {//     //1，先循环到起始时间和起始时间的12月//     s=Convert.ToInt32(sTime);//     x=zstarttime.Substring(0,4)+"12";//     nz=Convert.ToInt32(x);//     for(i=s+1;i<=nz;i++)//     {//      i=i++;//      sql+="select  * from "+i.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//     }//     //2，循环两者相差年份//     for(i=sy+1;i<ey;i++)//     {////      for(j=1;j<=12;j++)//      {//       if(j<10)//       {//        sql+="select  * from "+i.ToString()+"0"+j.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//       }//       else//       {//        sql+="select  * from "+i.ToString()+j.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//       }//      }//     }//     //3，循环到结束的月份//     js=Convert.ToInt32(zendtime.Substring(0,4)+"00");//     for(i=js;i<Convert.ToInt32(eTime);i++)//     {//      i++;//      sql+="select  * from "+i.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";////     }//     sql+="select  * from "+eTime.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" ";////    }//   }//    //三，取其他表生成生成SQL语句//   else//   {//    //1，先循环到起始时间和起始时间的12月//    s=Convert.ToInt32(sTime);//    x=zstarttime.Substring(0,4)+"12";//    nz=Convert.ToInt32(x);//    for(i=s;i<=nz;i++)//    {//     i=i++;//     sql+="select  * from "+i.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//    }//    //2，循环两者相差年份//    for(i=sy+1;i<ey;i++)//    {////     for(j=1;j<=12;j++)//     {//      if(j<10)//      {//       sql+="select  * from "+i.ToString()+"0"+j.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//      }//      else//      {//       sql+="select  * from "+i.ToString()+j.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";//      }//     }//    }//    //3，循环到结束的月份//    js=Convert.ToInt32(zendtime.Substring(0,4)+"00");//    for(i=js;i<Convert.ToInt32(eTime);i++)//    {//     i++;//     sql+="select  * from "+i.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" "+"union"+" ";////    }//    sql+="select  * from "+eTime.ToString()+'_'+tablehz+" "+"where"+" "+danwei+"="+dw+" "+" "+"and"+" "+xiansunlv+">="+startxsl+" "+"and"+" "+xiansunlv+"<="+endxsl+" ";////   }//   return sql;//  }//  #endregion

////  #region 根据查询时间的条件，动态生成查询语句//  /// <summary>//  /// 根据查询时间的条件，动态生成查询语句//  /// </summary>//  /// <param name="starttime">开始时间</param>//  /// <param name="endtime">结束时间</param>//  /// <param name="zhiduan">查询字段</param>//  /// <param name="tiaojiao">查询条件</param>//  /// <param name="tablehz">表后缀</param>//  /// <returns>SQL语句</returns>//  public  string SQL(DateTime starttime,DateTime endtime,string zhiduan,string tiaojiao,string tablehz)//  {////   string sql=null;//   //将输入的时间格式转换成固定的格式"yyyy-mm-dd"//   string zstarttime=starttime.GetDateTimeFormats('D')[1].ToString();//   string zendtime=endtime.GetDateTimeFormats('D')[1].ToString();//   string nTime=DateTime.Now.GetDateTimeFormats('D')[1].ToString();//////   //取日期值的前六位，及年月值//   string sTime=zstarttime.Substring(0,4)+zstarttime.Substring(5,2);//   string eTime=zendtime.Substring(0,4)+zendtime.Substring(5,2);//   string nowTime=nTime.Substring(0,4)+nTime.Substring(5,2);//   //分别取日期的年和月//   int sy=Convert.ToInt32(zstarttime.Substring(0,4));//   int ey=Convert.ToInt32(zendtime.Substring(0,4));//   int sm=Convert.ToInt32(zstarttime.Substring(5,2));//   int em=Convert.ToInt32(zendtime.Substring(5,2));//   //相关变量定义//   int s;//   int e;//   int i;//   int j;//   int js;//   int nz;//   string x;//   //一，取当前表生成SQL语句//   if(sTime==nowTime&&eTime==nowTime)//   {//    sql="select"+" "+zhiduan+" "+"from"+" "+tablehz+" "+"where"+" "+tiaojiao+" ";////   }//    //二，取当前表和其他表生成SQL语句//   else if(sTime==nowTime&&eTime!=nowTime)//   {//    sql="select"+" "+zhiduan+" "+"from"+" "+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////    //如果年份相等//    if(sy==ey)//    {//     s=Convert.ToInt32(sTime);//     e=Convert.ToInt32(eTime);//     for(i=s+1;i<e;i++)//     {//      i=i++;//      sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////     }//     sql+="select"+" "+zhiduan+" "+"from"+" "+e.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" ";////    }//     //结束年份大于开始年份//    else//    {//     //1，先循环到起始时间和起始时间的12月//     s=Convert.ToInt32(sTime);//     x=zstarttime.Substring(0,4)+"12";//     nz=Convert.ToInt32(x);//     for(i=s+1;i<=nz;i++)//     {//      i=i++;//      sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////     }//     //2，循环两者相差年份//     for(i=sy+1;i<ey;i++)//     {////      for(j=1;j<=12;j++)//      {//       if(j<10)//       {//        sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+"0"+j.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////       }//       else//       {//        sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+j.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";//       }//      }//     }//     //3，循环到结束的月份//     js=Convert.ToInt32(zendtime.Substring(0,4)+"00");//     for(i=js;i<Convert.ToInt32(eTime);i++)//     {//      i++;//      sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////     }//     sql+="select"+" "+zhiduan+" "+"from"+" "+eTime.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" ";////    }//   }//    //三，取其他表生成生成SQL语句//   else//   {//    //1，先循环到起始时间和起始时间的12月//    s=Convert.ToInt32(sTime);//    x=zstarttime.Substring(0,4)+"12";//    nz=Convert.ToInt32(x);//    for(i=s;i<=nz;i++)//    {//     i=i++;//     sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////    }//    //2，循环两者相差年份//    for(i=sy+1;i<ey;i++)//    {////     for(j=1;j<=12;j++)//     {//      if(j<10)//      {//       sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+"0"+j.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////      }//      else//      {//       sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+j.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";//      }//     }//    }//    //3，循环到结束的月份//    js=Convert.ToInt32(zendtime.Substring(0,4)+"00");//    for(i=js;i<Convert.ToInt32(eTime);i++)//    {//     i++;//     sql+="select"+" "+zhiduan+" "+"from"+" "+i.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" "+"union"+" ";////    }//    sql+="select"+" "+zhiduan+" "+"from"+" "+eTime.ToString()+'_'+tablehz+" "+"where"+" "+tiaojiao+" ";////   }//   return sql;//  }//  #endregion

 

 

 

 

以下是另一个地址的

 

/***********************************************************************
 * Module:  OraHelper.cs
 * Author:  hellopj
 * Purpose: Definition of the Class OraHelper
 ***********************************************************************/

using System;
using System.Data;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;
using System.Collections;
using System.Configuration;
namespace OraHelper
{
 public abstract class OraHelper
 {
   public static readonly string CONN_STRING_NON_DTC = ConfigurationSettings.AppSettings["ConnStr"].Trim();
  public static OracleConnection conn = new OracleConnection(CONN_STRING_NON_DTC);

  public static void OpenConnection()
  {
   if (conn.State != ConnectionState.Open)
    conn.Open();
  }
  public static void CloseConnection()
  {
   if (conn.State == ConnectionState.Open)
    conn.Close();
  }
  public static DataSet getDataSet(string cmdText)
  {
   
   OracleDataAdapter Adapter = new OracleDataAdapter(cmdText,conn);
   DataSet Data = new DataSet();
   Adapter.Fill(Data);
   return Data;
  }
  public static OracleDataReader ExecuteReader(string cmdText)
  {
   
   OracleCommand cmd = new OracleCommand();
   cmd.Connection=conn;
   cmd.CommandText=cmdText;
   OracleDataReader rdr = cmd.ExecuteReader();
   cmd.Parameters.Clear();
   return rdr;
  }
  public static int ExecuteNonQuery(string cmdText)
  {
   try
   {
    OracleCommand comm=new OracleCommand(cmdText,conn);
    comm.ExecuteNonQuery();
    return 1;
   }
   catch
   {
    return 0;
   }
  }
  public static void ExecuteNonQuery(string cmdText,OracleConnection conn)
  {
   try
   {
    OracleCommand comm=new OracleCommand(cmdText,conn);
    comm.ExecuteNonQuery();
   }
   catch
   {
    
   }
  }
  public static string ExecuteScalar(string cmdText)
  {
   string status="";
   try
   {
    OracleCommand comm=new OracleCommand(cmdText,conn);
    status=comm.ExecuteScalar().ToString();
    return status;
   }
   catch(Exception err)
   {
    //return "-1";
    return err.Message.ToString();
    
   }
  }
  private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
  public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   OracleCommand cmd = new OracleCommand();
   cmd.Connection = conn;
   cmd.Parameters.Clear();
   cmd.CommandText=cmdText;
   foreach (OracleParameter parm in cmdParms)
    cmd.Parameters.Add(parm);
   int val=cmd.ExecuteNonQuery();
   cmd.Parameters.Clear();
   return val;
  }

  public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   OracleCommand cmd = new OracleCommand();
   PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms);
   int val = cmd.ExecuteNonQuery();
   cmd.Parameters.Clear();
   return val;
  }

  
  public static OracleDataReader ExecuteReader(CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   
   OracleCommand cmd = new OracleCommand();
   try
   {
    PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
    OracleDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
    cmd.Parameters.Clear();
    return rdr;
   
   }
   catch (Exception e)
   {
    conn.Close();
    throw e;
   } 
  }
  
 
  public static object ExecuteScalar(string connString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   OracleCommand cmd = new OracleCommand();
   PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
   object val = cmd.ExecuteScalar();
   cmd.Parameters.Clear();
   return val;
  }

  
  public static object ExecuteScalar(CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   
   OracleCommand cmd = new OracleCommand();
   PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
   object val = cmd.ExecuteScalar();
   cmd.Parameters.Clear();
   return val;
  }
  
  public static int getScalar(CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
  {
   
   OracleCommand cmd = new OracleCommand();
   PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
   object val = cmd.ExecuteScalar();
   cmd.Parameters.Clear();
   int nVal  = Convert.ToInt32(val);
   return nVal;
   
  }

  
  
  public static void CacheParameters(string cacheKey, params OracleParameter[] cmdParms)
  {
   parmCache[cacheKey] = cmdParms;
  }

  
  public static OracleParameter[] GetCachedParameters(string cacheKey)
  {
   OracleParameter[] cachedParms = (OracleParameter[])parmCache[cacheKey];
   
   if (cachedParms == null)
    return null;
   
   
   OracleParameter[] clonedParms = new OracleParameter[cachedParms.Length];

   
   for (int i = 0, j = cachedParms.Length; i < j; i++)
    clonedParms[i] = (OracleParameter)((ICloneable)cachedParms[i]).Clone();

   return clonedParms;
  }

  
  private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] cmdParms)
  {
   
   if (conn.State != ConnectionState.Open)
    conn.Open();
   cmd.Connection = conn;
   cmd.CommandText = cmdText;
   cmd.CommandType = cmdType;
   //if (trans != null)
   //cmd.Transaction = trans;
   if (cmdParms != null)
   {
    foreach (OracleParameter parm in cmdParms)
     cmd.Parameters.Add(parm);
   }
  }

  public static int GetID(string SeqName) //得到序列的nextval
  {
   OracleCommand cmd = new OracleCommand();
   using (OracleConnection conn = new OracleConnection(CONN_STRING_NON_DTC))
   {
    string SqlText="select "+SeqName+".nextval from dual";
    
    PrepareCommand(cmd, conn, null, CommandType.Text,SqlText,null);
    int val = Convert.ToInt32(cmd.ExecuteScalar());
    cmd.Parameters.Clear();
    return val;
   }
  }
   }
}