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

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This is a migrated thread and some comments may be shown as answers.
bouda
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bouda asked on 12 May 2011, 04:23 PM
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

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Kiril Stanoev
Telerik team
answered on 17 May 2011, 09:34 AM
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
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bouda
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Kiril Stanoev
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