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:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

  <%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
   <system.web>
       <compilation debug="true"/>
   </system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

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.Table`1.System.Linq.IQueryProvider.Execute(Expression expression) +58
   System.Linq.Queryable.First(IQueryable`1 source, Expression`1 predicate) +260
   kzcr.konference.poplatkyControl.get_CID() in F:\Projects\kzcr2016x\kzcr2016x\konference\admin\poplatkyControl.ascx.cs:178
   kzcr.konference.poplatkyControl.set_Editable(Boolean value) in F:\Projects\kzcr2016x\kzcr2016x\konference\admin\poplatkyControl.ascx.cs:27
   ASP.konference_prihlaska_aspx.__BuildControl__control173() +81
   ASP.konference_prihlaska_aspx.__BuildControl__control172(Control __ctrl) +90
   System.Web.UI.CompiledBindableTemplateBuilder.InstantiateIn(Control container) +15
   System.Web.UI.WebControls.TemplateField.InitializeCell(DataControlFieldCell cell, DataControlCellType cellType, DataControlRowState rowState, Int32 rowIndex) +159
   System.Web.UI.WebControls.DetailsView.InitializeRow(DetailsViewRow row, DataControlField field) +266
   System.Web.UI.WebControls.DetailsView.CreateDataRowsFromFields(Object dataItem, Boolean dataBinding, TableRowCollection rows) +360
   System.Web.UI.WebControls.DetailsView.CreateDataRows(Boolean dataBinding, TableRowCollection rows, Object dataItem) +75
   System.Web.UI.WebControls.DetailsView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +1403
   System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +67
   System.Web.UI.WebControls.DetailsView.PerformDataBinding(IEnumerable data) +14
   System.Web.UI.WebControls.DetailsView.EnsureDataBound() +208
   System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +76
   System.Web.UI.Control.EnsureChildControls() +97
   System.Web.UI.WebControls.DetailsView.get_Rows() +38
   kzcr.konference.prihlaska.SetVals() in F:\Projects\kzcr2016x\kzcr2016x\konference\prihlaska.aspx.cs:277
   kzcr.konference.prihlaska.Page_Load(Object sender, EventArgs e) in F:\Projects\kzcr2016x\kzcr2016x\konference\prihlaska.aspx.cs:118
   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:4.8.4690.0