[NullReferenceException: 未将对象引用设置到对象的实例。]
MyControl.DataClass.getSortValue(Int32 ID, String Field) in D:\myWebApp\田氏家族\WebApp\Code\myControl.cs:110
WebApp.Menu.Page_Load(Object sender, EventArgs e) in D:\myWebApp\田氏家族\WebApp\Menu.aspx.cs:37
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.EventHandler.Invoke(Object sender, EventArgs e) +0
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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