列“productName”不属于表 Product。

[ArgumentException: 列“productName”不属于表 Product。] System.Data.DataRow.GetDataColumn(String columnName) +1986649 System.Data.DataRow.get_Item(String columnName) +13 Users_login.Page_Load(Object sender, EventArgs e) in e:\suzrb_epaper\suzrb2012.3.16\subao\kuaiqianweb\Users\login.aspx.cs:58 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627