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升级后，后台编辑版块出现如下错误，望指教Server Error in '/' Application. Specified argument was out of the range of valid values. Parameter name: 4 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.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. Parameter name: 4

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentOutOfRangeException: Specified argument was out of the range of valid values.Parameter name: 4]  System.Web.UI.WebControls.ListControl.set_SelectedValue(String value) +151  Discuz.ForumPage.Admin.Forums.EditForums.LoadCurrentForumInfo(Int32 fid) +335  Discuz.ForumPage.Admin.Forums.EditForums.InitializeComponent() +401  Discuz.ForumPage.Admin.Forums.EditForums.OnInit(EventArgs e) +13  System.Web.UI.Control.InitRecursive(Control namingContainer) +241  System.Web.UI.Page.ProcessRequestMain() +197

Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032

找到原因了，结帖