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    “/”應用程序中的服務器錯誤。

    序列不包含任何元素

    說明: 執行當前 Web 請求期間,出現未處理的異常。請檢查堆棧跟蹤信息 ,以了解有關該錯誤以及代碼中導緻錯誤的出處的詳細信息。

    異常詳細信息: System.InvalidOperationException: 序列不包含任何元素

    源錯誤:

    
    行 471:        classlist lll = null;
    行 472:        if (Id != 0) 
    行 473:            ll = dl.classlist.First(a => a.Id == Id);
    行 474:        if(Id==0 && cid==0)
    行 475:            str.Append("<label><a href=\"/\">首頁</a><i>></i><a href=\""+Url+"\">" + GetTitle(FId) + "</a></label>");

    源文件: f:\usr\localuser\qxw1608790003\App_Code\operate.cs    行: 473

    堆棧跟蹤:

    
    [InvalidOperationException: 序列不包含任何元素]
       System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) +847
       System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +113
       System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +344
       System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute(Expression expression) +49
       System.Linq.Queryable.First(IQueryable`1 source, Expression`1 predicate) +301
       operate.GetDaoHang(Int32 Id, Int32 cid, Int32 FId, String Url) in f:\usr\localuser\qxw1608790003\App_Code\operate.cs:473
       ASP.productlist_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in f:\usr\localuser\qxw1608790003\productList.aspx:68
       System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +256
       System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
       System.Web.UI.Page.Render(HtmlTextWriter writer) +29
       System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
       System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
       System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
       System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266
    


    版本信息: Microsoft .NET Framework 版本:2.0.50727.8669; ASP.NET 版本:2.0.50727.5491
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