Column footer on hierarchy not updating

[Darryn]

I setup a hierarchy template on my bound GridView. Inside of the hierarchy I have column footer to sum all the values. I have an event that fires in the background that updates the values inside the hierarchy template. However, the sum in the column footer of the hierarchy template does not update. I tried calling CalculateAggregates() on the GridView, but it doesn't seem to do anything for the hierarchy.

[Dimitrina]

Hi,

The AggregateResults in the RadGridView will be updated once a collectionchanged event has been received. How do you edit the value? Would you please follow the editing approach from this help article?
 

Regards,
Didie
Telerik

[Darryn]

The hierarchy template is bound to an ObservableCollection of an custom class that implements INotifyPropertyChanged. The values in the bound collection are being updated by a separate thread. 

The values in the cells are being updated on the screen, its just the sum in the column footer that does not update.

[Dimitrina]

Hello,

As a PropertyChanged notification is received by the GridView, the values in its cells are updated. In order to get the aggregates updated, then a CollectionChanged should be raised from the source collection. You can perform a simple test - would you please sort any of the columns after updating the values from code? Does the aggregate value update?

Regards,
Didie
Telerik

[Darryn]

Sorting does update the value in the sum column.

Is there a recommended way of firing the CollectionChanged event on the collection?

[Dimitrina]

Hello,

Here I have listed the options you have in order to get the GridView's aggregates updated when a value is changed from the source:
1. Invoke a GridView.Rebind()
2. Use the approach demonstrated in this help article for editing the items.
3. Raise a CollectionChanged event for your source collection.
4. Invoke CalculateAggregates() for the GridView in the hierarchy. 
 
Do any of those options work for you?

Regards,
Didie
Telerik

[Darryn]

How do I call CalculateAggregates() on the gridview in the hierarchy?

[Dimitrina]

Hi,

You could find the Hierarchy GridView similar to:

GridViewRow row = this.clubsGrid.GetRowForItem(this.clubsGrid.Items[2]);
var grid = row.ChildrenOfType<RadGridView>().FirstOrDefault();
if (grid != null)
{
    grid.CalculateAggregates();
}

I hope this helps.

Regards,
Didie
Telerik