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:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   CategoryPage.OnCategory(Object sender, LinqDataSourceSelectEventArgs e) +782
   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.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:4.8.4700.0