[NullReferenceException: Object reference not set to an instance of an object.]
product_Category.OnCategory(Object sender, LinqDataSourceSelectEventArgs e) +2092
System.Web.UI.WebControls.LinqDataSourceView.OnSelecting(LinqDataSourceSelectEventArgs e) +91
System.Web.UI.WebControls.LinqDataSourceView.GetSource(QueryContext context) +136
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() +103
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +76
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +114
System.Web.UI.WebControls.ListView.CreateChildControls() +52
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
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