SortDescriptors collection of RadGridView is Empty

[Max]

We have a grid where we have enabled custom sorting and have hooked into the OnGridSorting event. This is getting called when someone clicking on a column header to sort it, as expected. However, the grid's SortDescriptors collection is null.

 I would like to be able to add a SortDescriptor for the column that is being sorted that uses an expression, if it's a particular type of data. However, the collection is empty, which suggests there is a problem.

 Thanks.

Max

 

[Max]

NB as shown in the example here:

http://docs.telerik.com/devtools/silverlight/controls/radgridview/sorting/how-to/generic-descriptor

 

[Max]

Actually the collection is empty. Not null:

private static void OnGridSorting(object sender, GridViewSortingEventArgs e)
 {

            TelerikBoundColumnGridView gridView = sender as TelerikBoundColumnGridView;

            if (gridView.SortDescriptors != null)
            {
                      // SortDescriptors collection is empty, but GridViewSortingEventArgs has info about the column being sorted
            }
}

[Max]

Typically, I've just discovered I can do what I need to do. However, I'm still curious to know why there are no SortDescriptors already set up.

[Stefan]

Hi Max,

The described behavior would be expected since you have subscribed to the Sorting event of RadGridView. This event is raised just before the control is being sorted, so the corresponding SortDescriptor is not yet added to the SortDescriptors collection. If you subscribe to the Sorted event,  which is raised just after RadGridView is sorted, you will notice that the SortDescriptor is already added to the SortDescriptors collection.

Please check our documentation on Sorting events for further reference.

Best Regards,
Stefan
Telerik