关于Net异步页面问题

Question

查询的资料上都是用异步页面调用SqlCommand的BeginExecuteReader、BeginExecuteNonQuery方法,Oracle数据库没有办法通过NET异步调用吗?

Answer 1

protected void Page_Load(object sender, EventArgs e)
        {
            AddOnPreRenderCompleteAsync(
    new BeginEventHandler(BeginAsyncOperation),
    new EndEventHandler(EndAsyncOperation)
);
        }
IAsyncResult BeginAsyncOperation(object sender, EventArgs e, AsyncCallback cb, object state)
        {
            string sql = "SELECT TOP 10 * FROM dbo.Card_Ext";
            SqlConnection _conn = new SqlConnection(ConfigurationManager.             AppSettings["DataAccessContionStringRead"].ToString());            _conn.Open();
            SqlCommand cmd = new SqlCommand(sql, _conn);
            IAsyncResult rIsynResult = cmd.BeginExecuteReader(cb, cmd,             CommandBehavior.CloseConnection);            return rIsynResult;
        }
        void EndAsyncOperation(IAsyncResult IResult)
        {
            if (!IResult.IsCompleted)
            {
                IResult.AsyncWaitHandle.WaitOne();
            }
            else
            {
                SqlDataReader dr = (IResult.AsyncState as SqlCommand).EndExecuteReader(IResult);
                if (!dr.IsClosed)
                {
                    List<string> _list = new List<string>();
                    while (dr.Read())
                    {
                        _list.Add(dr[0].ToString());
                    }
                    this.GridView1.DataSource = _list;
                    this.GridView1.DataBind();
                }
                dr.Close();
            }
        }这是代码,但是Oracle里没有 cmd.BeginExecuteReader()这个方法。