——发上贴时，报了这个错：

Server Error in '/' Application.
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Specified cast is not valid.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: Specified cast is not valid.

Source Error:


Line 237:
Line 238: // 在显示的贴子后面跟贴
Line 239: ForumSystem.AddMessage( board.BoardName, message.MessageGlobalID, SecureSystem.CurrentUser, msgcontent );
Line 240: Response.Redirect( ForumSystem.GetBoardUrl( board ) );
Line 241:


Source File: d:\zhaix\websites\cndev.org#www\_addon\ForumSystem\msg.aspx.cs Line: 239

Stack Trace:


[InvalidCastException: Specified cast is not valid.]
NoxForum.Framework.ForumSystem.AddMessage(String BoardName, ForumMessage messageParent, ICurrentUser CurrentUser, ForumMessageContent msgcontent) +1098
NoxForum.Framework.ForumSystem.AddMessage(String BoardName, Int32 nParentMessageID, ICurrentUser CurrentUser, ForumMessageContent msgcontent) +131
msg_aspx.doActionView() in d:\zhaix\websites\cndev.org#www\_addon\ForumSystem\msg.aspx.cs:239
msg_aspx.Page_Load(Object sender, EventArgs e) in d:\zhaix\websites\cndev.org#www\_addon\ForumSystem\msg.aspx.cs:56
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +34
System.Web.UI.Control.OnLoad(EventArgs e) +99
NoxForum.Framework.Pages.BasePage.OnLoad(EventArgs e) +79
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061




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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210