Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 68:         }
Line 69:         var nowtag = TagList.Where(t => t.visible && t.url == Name).FirstOrDefault();
Line 70:         var parenttag = TagList.Where(t => t.visible && t.id == nowtag.parentid).FirstOrDefault();
Line 71: 
Line 72:         if (TagList.Any(t => t.parentid == nowtag.id)) divTag.Visible = true;

Source File: c:\inetpub\vhosts\u0942566.plsk.regruhosting.ru\oboicrimea.ru\catalog\default.aspx.cs    Line: 70

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   <>c__DisplayClassd.<LinqDataSource1_Selecting>b__5(OneTag t) in c:\inetpub\vhosts\u0942566.plsk.regruhosting.ru\oboicrimea.ru\catalog\default.aspx.cs:70
   System.Linq.WhereListIterator`1.MoveNext() +77
   System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source) +168
   Catalog_Default.LinqDataSource1_Selecting(Object sender, LinqDataSourceSelectEventArgs e) in c:\inetpub\vhosts\u0942566.plsk.regruhosting.ru\oboicrimea.ru\catalog\default.aspx.cs:70
   System.Web.UI.WebControls.LinqDataSourceView.OnSelecting(LinqDataSourceSelectEventArgs e) +116
   System.Web.UI.WebControls.LinqDataSourceView.GetSource(QueryContext context) +143
   System.Web.UI.WebControls.LinqDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +64
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +22
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +151
   System.Web.UI.WebControls.ListView.PerformSelect() +104
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +76
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +114
   System.Web.UI.WebControls.ListView.CreateChildControls() +56
   System.Web.UI.Control.EnsureChildControls() +97
   System.Web.UI.Control.PreRenderRecursiveInternal() +42
   System.Web.UI.Control.PreRenderRecursiveInternal() +163
   System.Web.UI.Control.PreRenderRecursiveInternal() +163
   System.Web.UI.Control.PreRenderRecursiveInternal() +163
   System.Web.UI.Control.PreRenderRecursiveInternal() +163
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +906


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0