Code breaks, after upgrading to 2012 Q1

[Aracna]

Hi,

I have used grouping and filtering programmatically in my  application by following the post below.
http://www.telerik.com/community/forums/wpf/gridview/group-aggregate-without-displaying-the-group-panel.aspx 

But after I upgraded my controls to 2012 Q1, the grouping event is not triggered at all.

[Aracna]

Awaiting a reply on this...

[Vera]

Hello Aracna,

 
Actually, this is by design. The Grouping event is raised when the data in RadGridView is grouped from the UI. You can use GroupDescriptors_CollectionChanging event instead.

I hope this helps.

Kind regards,
Vera
the Telerik team

[Aracna]

The GroupDescriptor_CollectionChanged event is never raised either.

[Vera]

Hello Aracna,

 
I have modified the project attached in the forum thread using binaries from Q2 2012. Please take a look at it.

Let me know in case further assistance is needed.

Kind regards,
Vera
the Telerik team

[Aracna]

In my codes I had some thing like
private void Button1_Click(object sender, RoutedEventArgs e)
        {
_groupview = new QueryableCollectionView(FODListGrid.Items);
            var descriptor = new GroupDescriptor() { Member = "Country" };
            descriptor.AggregateFunctions.Add(new CountFunction());
            this.ListGrid.GroupDescriptors.Add(descriptor);
}

Then when I wish to display these groups I have code like:

 foreach (QueryableCollectionViewGroup catgroup in _groupview.Groups)
 {
}

But the _groupview.Groups is null

[Vera]

Hi Aracna,

 
Actually, the groups are expected to be null. In order to get the groups you can use e.NewItems and e.OldItems of GroupDescriptors_CollectionChanged event. See the code bellow:

foreach (GroupDescriptor item in e.NewItems
{

}

I hope this helps.

Regards,
Vera
the Telerik team