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 74:            
Line 75:             int memberId = Convert.ToInt32(Request.QueryString["mid"].ToString());
Line 76:             var memberDetails = (from m in _CarmelContext.MemberModel
Line 77:                                  join ma in _CarmelContext.MemberAddressModel on m.id equals ma.member_id
Line 78:                                  join mc in _CarmelContext.MemberCategoryModel on m.member_category_id equals mc.id

Source File: g:\pleskvhosts\chavaralibrary.in\Webs\cmicarmel.org\SentGreetings.aspx.cs    Line: 76

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.Single(IEnumerable`1 source) +320
   System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__3(IEnumerable`1 sequence) +40
   System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +60
   System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +113
   System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +113
   System.Linq.Queryable.Single(IQueryable`1 source) +220
   SentGreetings.LoadMemberDetails() in g:\pleskvhosts\chavaralibrary.in\Webs\cmicarmel.org\SentGreetings.aspx.cs:76
   SentGreetings.Page_Load(Object sender, EventArgs e) in g:\pleskvhosts\chavaralibrary.in\Webs\cmicarmel.org\SentGreetings.aspx.cs:65
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0