Aggregates not working on collection of an interface

[Karl Farrand]

Hi,

Some time ago I had an issue where I was binding to a CollectionSourceView that was an ObservableCollection<I>
ie (ObservableCollection<IBenefit> where IBenefit could be the following types
a) Benefit
b) BenefitMotorVehicle (which inherits from Benefit, but extends it's functionality and overrides certain properties, Including Excl GST and Incl GST)

Link to original issue
http://www.telerik.com/community/forums/silverlight/gridview/binding-radgridview-to-collectionviewsource.aspx#1792736

This issue was resolved when I used a newer version of the RadGridView, now all items show in grid.

However the aggregation of these numbers does not seem to be working correctly.
Scenario 1 - Only items of type BenefitMotorVehciles are in the list, totals work fine.
Scenario 2 - I have mixed items of type Benefit and BenefitMotorVehicle, the aggregate only totals those objects of type Benefit

See screenshot attached

I am using v2013 Q1 and binding using MVVM

Is there a way I can get all the items totalling?

Cheers

[Dimitrina]

Hello,

I have tested such a scenario setting an ItemsSource as described in Scenario 2. Still, the SumFunction calculated the aggregate result right.

Would it be possible for you to isolate the issue in a sample project and send it to us?
 

Kind regards,
Didie
the Telerik team