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Oracle数据库操作类(c#)


  用OracleConnection连接Oracle
  
  在Web.config中配置 <add key="Oracle" value="Data Source=xxx;User ID=xxx;Password=xxx"/>
  
  public System.Data.OracleClient.OracleConnection cnn;
  
  /// <summary>
  /// 打开数据库连接
  /// </summary>
  public void Open()
  {
  cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
  cnn.Open();
  }
  
  /// <summary>
  /// 打开数据库连接,返回cnn
  /// </summary>
  public OracleConnection OpenCnn()
  {
  cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
  cnn.Open();
  return(cnn);
  }
  
  /// <summary>
  /// 关闭数据库连接
  /// </summary>
  public void Close()
  {
  cnn.Close();
  }
  
  /// <summary>
  /// 返回DataSet
  /// </summary>
  /// <param name="CmdString"></param>
  /// <param name="TableName"></param>
  /// <returns></returns>
  public DataSet GetDataSet(string CmdString,string TableName)
  {
  Open();
  OracleDataAdapter myDa =new OracleDataAdapter();
  myDa.SelectCommand = new OracleCommand(CmdString,cnn);
  DataSet myDs =new DataSet();
  myDa.Fill(myDs,TableName);
  Close();
  return myDs;
  }
  
  /// <summary>
  /// 返回OleDbDataReader
  /// </summary>
  /// <param name="CmdString"></param>
  /// <returns></returns>
  public OracleDataReader GetDataReader(string CmdString)
  {
  Open();
  OracleCommand myCmd =new OracleCommand(CmdString,cnn);
  OracleDataReader myDr =myCmd.ExecuteReader();
  return myDr;
  }
  
  /// <summary>
  /// 返回影响数据库的行数
  /// </summary>
  /// <param name="CmdString"></param>
  /// <returns></returns>
  public int ExecuteSQL(string CmdString)
  {
  Open();
  OracleCommand myCmd =new OracleCommand(CmdString,cnn);
  int Cmd =myCmd.ExecuteNonQuery();
  Close();
  return Cmd;
  }
  
  /// <summary>
  /// 邦定DroDownList
  /// </summary>
  /// <param name="DroDList"></param>控件名
  /// <param name="sql"></param>连接字符串
  /// <param name="TableName"></param>表名
  /// <param name="DataTextFd"></param>提供文本内容的数据源字段
  /// <param name="DataValueFd"></param>为列表项提供值的数据源字段
  public void DroList(DropDownList DroDList,string sql,string TableName,string DataTextFd,string DataValueFd)
  {
  Open();
  OracleDataAdapter myDa =new OracleDataAdapter(sql,cnn);
  myDa.SelectCommand.CommandType = CommandType.Text;
  DataSet myDs =new DataSet();
  try
  {
  myDa.Fill(myDs,TableName);
  DroDList.DataSource = myDs.Tables[TableName];
  DroDList.DataTextField = DataTextFd;
  DroDList.DataValueField = DataValueFd;
  DroDList.DataBind();
  }
  catch(Exception e)
  {
  Response.Write(e.Message);
  }
  finally
  {
  Close();
  }
  }
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