[InvalidOperationException: 可為 Null 的物件必須具有值。]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +56
System.Nullable`1.get_Value() +12770166
tw_about_index.Page_Load(Object sender, EventArgs e) in d:\userdata\vhosts\iesstudy.com.tw\httpdocs\page\about\index.aspx.cs:23
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
System.EventHandler.Invoke(Object sender, EventArgs e) +0
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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