求助!!!

protected void Page_Load(object sender, EventArgs e)
    {
        DataSet ds = GetDataItem("select * from news");
        DataRow[] row = ds.Tables[0].Select("id"+Request.QueryString["id"]);
        foreach (DataRow rs in row)
        {
            this.Page.Title = rs["classnew"].ToString();
            Label1.Text = rs["classnew"].ToString();
            Label2.Text = "      " + rs["classnn"].ToString();
        }
    }



显示错误   错误    1    “GetDataItem”方法没有采用“1”个参数的重载    C:\Documents and Settings\Administrator\桌面\web\showNew.aspx.cs    17    22    C:\...\web\
是什么意思啊???


要怎么改正呢?