GridView with custom filter

[Paul]

I am attempting to persist a gridview with custom filteringer.  I am using the GridViewCustomPropertyProvider class in your example and see that I am hitting the ProvideValue method but in the if condition for FilterDescriptors I have no ColumnFilterDescriptor which IsActive is true.  If I remove my custom filter I do find the IsActive column.

 

My custom filter does function get applied to the grid as I am implementing the IFIlteringControl.  I also do have an IsActive DependencyProperty on my class.  In fact, the basis for my custom control was from your example code as well.

Is there some issue with using the PersistanceManagers Save method when the filter is a custom filter or am I missing something?

Thanks

Paul

[Paul]

I created ticket 676488 to include a sample project.

Thanks

Paul

[Tina Stancheva]

Hi Paul,

We posted a reply in the support thread you stared. Basically, in order to persist the custom filter, you need to customize the GridViewCustomPropertyProvider. You need to slightly change the ProvideValue() and RestoreValue() methods to save/load the settings of your custom filtering control.

And as we suggested in the support thread, you can access the columns FilteringControl and if it's not null and it is active, then you can make sure to save its settings (the properties of the custom CategoricalCustomFilterControl). You can try to extend the current logic of the ProvideValue() method - when saving the FilterDescriptors like so:

if (settings.Count == 0)
{
    foreach (GridViewDataColumn column in gridView.Columns
        .OfType<GridViewDataColumn>())
    {
        FilterSetting setting = new FilterSetting();

        setting.ColumnUniqueName = column.UniqueName;

        if (column.FilteringControl != null && column.FilteringControl.IsActive)
        {
            var customDescr = column.FilteringControl as CategoricalCustomFilterControl;
            if (customDescr != null)
            {
                //save the customDescr properties in the setting object
            }
        }
    }
}

Let us know if that helps or if we can further assist you.

Regards,
Tina Stancheva
the Telerik team

[Paul]

I am using the FilterControl now and do get my categorical results which I manage the same way the Distinct values are.  I have additional filter controls, numeric, date and textual, which use a composite filter.  I expect to use the Filter1 and Filter2 objects to persist those values.

Thanks

Paul

[Paul]

The implementation went in place very well. This recommendation did resolve my problem.

Thank you for your assistance.

Paul