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 409:
Line 410:    Public Function GetFile(ByVal ID_File As Integer) As File
Line 411:        Return (From f In Files Where f.ID_File = ID_File).First
Line 412:    End Function
Line 413:

Source File: D:\Data\www\www.bibliothecaEconomica.cz\App_Code\BEDataContext.vb    Line: 411

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) +1217
   System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +120
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +360
   System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +58
   System.Linq.Queryable.First(IQueryable`1 source) +220
   BEDataContext.GetFile(Int32 ID_File) in D:\Data\www\www.bibliothecaEconomica.cz\App_Code\BEDataContext.vb:411
   download.Page_Load(Object sender, EventArgs e) in D:\Data\www\www.bibliothecaEconomica.cz\library\file\download.aspx.vb:11
   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