[HttpException (0x80004005): 控件包含代码块(即 <% ... %>),因此无法修改控件集合。]
System.Web.UI.ControlCollection.Add(Control child) +247
_Default.Page_Load(Object sender, EventArgs e) +35214
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
System.Web.UI.Control.OnLoad(EventArgs e) +79
System.Web.UI.Control.LoadRecursive() +130
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2852
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