how to display the BusyIndicator that hang ExpandAll () runs a RadTreeView

[bouda]

Hello ,

I am using Silverlight application and I have a Telerik RadTreeView. I like display the BusyIndicator hang the methode ExpnadAll() runs.
Note : (My RadTreeView contains many elements)

My code looks like this :

 

 

private void Button_ExpandAll(object sender, RoutedEventArgs e)

 

 

 

 

{

 

 

 

 

 

 

 

 

    this.MyBusy = true;

 

 

 

 

 

    this.MytreeView.ExpandAll();

 

 

 

 

 

    this.MyBusy = false;
}

But the BusyIndicator is never displayed.

 

 

 

Cordially
Theo

[Kiril Stanoev]

Hi bouda,

Unfortunately this approach is not supported for the moment. RadTreeView's ExpandAll operation is UI operation, thus it has to be done on the UI thread which leads to blockit it. Therefore, using the BackgroundWorker class will not help. I've added an item in our PITS under the name "TreeView: Do not block the UI thread during ExpandAll" which will be available for tracking and voting tomorrow the latest. If the item gathers enough popularity, we will definitely consider implementing it. I've also updated your Telerik points accordingly.

All the best,
Kiril Stanoev
the Telerik team