[Solved] Adding DelegateFilterDescriptor to FiltersDescriptors collection doesn't update column

[Patrick]

In order to improve its use, I save user's sorts, groups and filters in the event "OnNavigatedFrom" of the page containing the grid.

In the event "OnNavigatedTo" I retrieve the saved descriptors and add them to the collections GroupDescriptors , SortDescriptors , FilterDescriptors to display the grid in its previous state.

This works well for standard descriptors ( PropertyGroupDescriptor , PropertySortDescriptor , PropertyFilterDescriptor ) , the grid is displayed correctly and graphics UI(column and group headers) are updated.

But when I add a custom descriptor ( DelegateFilterDescriptor ) which corresponds to a list of checkboxes in the filtering UI, the rows filter is ok ​​but the column header is not updated (the rectangle in the bottom of the header is not displayed to show that there is an active filter on the column) and there is not descriptor associated to the column. 

What do you think of this behavior ?

Regards

Patrick

[Ivaylo Gergov]

Hi,

I confirm the current version of RadDataGrid does not show the rectangle in the column header when a delegate filter descriptor has been applied. As a workaround I can suggest that you add a dummy PropertyFilterDescriptor when you add DelegateFilterDescriptor/s (this will cause the RadDataGrid to show the rectangle) and respectively remove it when you remove the DelegateFilterDescriptor/s.
For example you can create a class that derives from the TextFilterDescriptor and override it's PassesFilterOverride method to always return true(thus all items will pass the filter):

public class PropertyDescriptor : TextFilterDescriptor
 {
     protected override bool PassesFilterOverride(object itemValue)
     {
         return true;
     }
 }

<local:PropertyDescriptor  PropertyName="PropertyName"/>

Let me know if this works for you.

Regards,
Ivaylo Gergov
Telerik