Server Error in '/' Application.

Sequence contains no elements

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.InvalidOperationException: Sequence contains no elements

Source Error:


Line 157:    {
Line 158:        thegioisimsoDataContext db = new thegioisimsoDataContext();
Line 159:        Menu mn = db.Menus.Single(m => m.Mod == menuMod);
Line 160:        return mn.MenuName;
Line 161:    }

Source File: d:\inetpub\simsoviettel.vn\httpdocs\App_Code\BAL\controls.cs    Line: 159

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) +3266
   System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +189
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +428
   System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute(Expression expression) +51
   controls.ReturnMenuName(String menuMod) in d:\inetpub\simsoviettel.vn\httpdocs\App_Code\BAL\controls.cs:159
   index.Page_Load(Object sender, EventArgs e) in d:\inetpub\simsoviettel.vn\httpdocs\index.aspx.cs:28
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4654.0