FilterExpressions throws "index error" on postback

[Jason Horspool]

I have assigned multiple Group FilterExpressions to my ListView and am receiving the following error on postback:

"Index was out of range. Must be non-negative and less than the size of the collection."

Wondering if this indeed a bug or if I'm databinding my Listview incorrectly?  I'm using the NeedDataSource function of the ListView to load the data.  I have a button to "Apply Filter" that calls the RadListView1.Rebind method.  I've tried to trace but the error is thrown before any databinding occurs on the Listview (something to do with the Viewstate for the FilterExpressions on the ListView)?

Thanks for any help,
Jason

[Veli]

Hi Jason,

We are unable to identify the cause of this issue from the description you provided. Can you show us some sample code related to the RadListView initialization, databinding and filtering. Also, if your listview is in a user control, can you also specify how do you instantiate the user control on your page.

Veli
the Telerik team

[Jason Horspool]

The RadListView is hosted within a user control that is loaded using the Page.LoadControl method and added to a PlaceHolder in the hosting pages Init function:

Dim ctlTasks As Object = Page.LoadControl("/Controls/TasksControl.ascx")
Me.PlaceHolder1.Controls.Add(ctlTasks)

The user control then uses the NeedDataSource to databind the ListView.  It works fine until I assign any FilterExpressions to the ListView, once I do that, I cannot do any postback or I get the FilterExpressions error.

[Veli]

Can you send us the stack trace of the exception? As far as you describe, the user control is initialized properly, so is RadListView. If this issue persists, consider opening a regular support ticket where you can send us a stripped down runnable project we can debug locally. This will help us better identify the cause of this issue.

Veli
the Telerik team