“/”应用程序中的服务器错误。

序列不包含任何元素

说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.InvalidOperationException: 序列不包含任何元素

源错误:


行 532:        var site1 = (from a in dl.website select a).First();
行 533:        sitTitle1 = site1.Title;
行 534:        var site = (from a in dl.classlist where a.Id == stype select a).First();
行 535:        title1 = site.STitle;
行 536:        key1 = site.SKeys;

源文件: f:\usr\localuser\qxw1608150077\App_Code\operate.cs    行: 534

堆栈跟踪:


[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.DataQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +49
   System.Linq.Queryable.First(IQueryable`1 source) +269
   operate.siteweb(Int32 stype) in f:\usr\localuser\qxw1608150077\App_Code\operate.cs:534
   ASP.cishan_list_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in f:\usr\localuser\qxw1608150077\cishan\list.aspx:10
   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