[Solved] RadGridView crash

[Dan]

I have a RadGridView control with it's ItemSource set to this ItemsSource="{Binding PagedSource, ElementName=radDataPager}" then I set the .Source of the dataPages to my Collection. This works great I can go to pages etc no problem. Until I try to group by columns. If I'm on the first page everythig works fine. If I switch to a page 2 and beyond I get a crash. Could anyone help me with this issue?

Here is the stack trace:

____ An unhandled exception (‘Unhandled Error in Silverlight Application
 Code: 4004
 Category: ManagedRuntimeError
 Message: SystemJnvalidCastException: Unable to cast object of type
 ‘myUI.l.Changel isV to type Telerik.Windows.DataJGroup’.
 at System.Linq.Enumerable.<Castlterator>d_bl’1.MoveNexto
 at Telerik.Windows.Data.GroupExtensions.LeaflndexOf(IEnumerable’1
 groups, Object item)
 at
 Telerik.Windows.Data.QueryableCollectionView.G roupedlndexOf(Object
 item)
 at Telerik.Windows.Data.QueryableCollectionViewlnternallndexOf(Object
 item)
 at Telerik.Wi ndows.Data.QueryableCollectionViewJndexOf(Object item)
 at Telerik.Wi ndows.Data.QueryableCollectionView.MoveCu rrentTo(Object
 item)
 at Telerik.Wi ndows.Data.DataltemCol lection.MoveCu rrentTo(Object item)
 at
 Telerik.Windows.Data.DataltemCollection.UpdateCurrentltemFromSource...
 at
 Telerik.Windows.Data.DataltemCollection.HandleCu rrenthemChangeOfSo...
 sender, EventArgs args)
 at
 Telerik.Windows.Data.DataltemCol lection,Telerik.Wi ndows.Data.lWeakEve...
 sender, EventArgs args)

[Dan]

This is actually blocking our deployment and I'm wondering why Telerik people are showing no interest in this bug.

[Rossen Hristov]

Hi Dan,

Can you try to bind them in the opposite way. In other words, bind the grid to the original collection and then bind the pager to RadGridView.Items. Is the behavior different?

Greetings,
Ross
the Telerik team