Cannot group, sort and filter a specific column

PROBLEM

You cannot sort, group and/or filter a column even if the all three properties are true: CanUserSortColumns, IsFilteringAllowed, ShowGroupPanel.

CAUSE

Probably you are using a CellTemplate for that particular column and you have not specified the DataMemberBinding property of it like this:

XAML

	<telerik:GridViewDataColumn Header="FirstName" >
	    <telerik:GridViewDataColumn.CellTemplate>
	        <DataTemplate>
	            <TextBlock Text="{Binding FirstName}" />
	        </DataTemplate>
	    </telerik:GridViewDataColumn.CellTemplate>
	</telerik:GridViewDataColumn>

SOLUTION

Set the DataMemberBinding property of the column to the field that you want the gridview to sort, group and filter on.

XAML

	<telerik:GridViewDataColumn Header="FirstName" DataMemberBinding="{Binding FirstName}" >
	    <telerik:GridViewDataColumn.CellTemplate>
	        <DataTemplate>
	            <TextBlock Text="{Binding FirstName}" />
	        </DataTemplate>
	    </telerik:GridViewDataColumn.CellTemplate>
	</telerik:GridViewDataColumn>