急急急！求Oracle异步查询示例……

[w19891130]

private void BindDataWithCallBack()
{
string connStr = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
string sql = "select count(*) from wfm_procinst where procid in (select pid from wfm_process where mid in (select mid from wfm_model where type = '土地登记')) and prjstate = '已完成'";
using (OracleConnection MyCon = new OracleConnection(connStr))
{
OracleCommand SupCmd = new OracleCommand(sql, MyCon);
OracleDataReader SupDr;
IAsyncResult SupIsynResult;
MyCon.Open();
AsyncCallback Callback = new AsyncCallback(CallBackMethod);
SupIsynResult = SupCmd.BeginExecuteReader(Callback, SupCmd, CommandBehavior.CloseConnection);
System.Threading.Thread.Sleep(100);
MyCon.Dispose();
SupCmd.Dispose();
}

}
//回调方法
public void CallBackMethod(IAsyncResult IResult)
{
OracleCommand Command = (OracleCommand)IResult.AsyncState;
OracleDataReader dr = Command.EndExecuteReader(IResult);
}

编译报错：
不包含 BeginExecuteReader 和 EndExecuteReader 的定义

[w19891130]

自己顶一下，求高手……

[w19891130]

高手来啊……

[w19891130]

为什么还是没有人……

[仙剑]

Oracle 貌似不支持异步查询，OracleCommand并没有BeginExecuteReader方法