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 23:         Dim getid = CInt(Request.QueryString("idx"))
Line 24:         'caso senza parametri
Line 25:         immo = (From immobili In dbcontext.pkproperty
Line 26:                 Where immobili.idimmobile = getid
Line 27:                 Order By immobili.idimmobile Descending

Source File: D:\inetpub\webs\andromedafortedeimarmiit\webpdftest2.aspx.vb    Line: 25

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.First(IEnumerable`1 source) +405
   System.Data.Objects.ELinq.<>c__11`1.<GetElementFunction>b__11_0(IEnumerable`1 sequence) +38
   System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +60
   System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +134
   System.Linq.Queryable.First(IQueryable`1 source) +211
   webpdftest2.Page_Load(Object sender, EventArgs e) in D:\inetpub\webs\andromedafortedeimarmiit\webpdftest2.aspx.vb:25
   System.Web.UI.Control.OnLoad(EventArgs e) +79
   System.Web.UI.Control.LoadRecursive() +130
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2850


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4667.0