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RadGridView Extended Selection with Additive Row Selection

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Bob
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Bob asked on 05 Jun 2012, 06:14 PM
Hello,

I have a RadGridView for which I'd like to take advantage of the extended selection mode (shift-click, ctl-click, etc...), but also need the act of clicking on a row to add it to the list of selected rows without clearing out the other entries.  I would also like the act of clicking on a row that is already selected to remove it from the list of selected rows - much the same way Multiple selection mode behaves.

Is there a way to implement this behavior?

Thanks

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Dimitrina
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answered on 06 Jun 2012, 11:48 AM
Hello,

 Unfortunately the different SelectionModes cannot be mixed. You could use the one you find more convenient for your solution.

Kind regards,
Didie
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Bob
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answered on 06 Jun 2012, 11:55 AM
Thanks for your response.

I haven't found an event I can hook into yet that would really meet this need (i.e. the additive row selection / deselection) - the closest I've found is the CurrentCellChanged event; however, that seems to fire more often than I would like / can be fired due to a programmatic selection change / doesn't fire at all if you click on the current cell again.

Are there any plans to include a RowClick event in the future, or is there one exposed now that I have simply not yet found?

Thanks
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Dimitrina
Telerik team
answered on 06 Jun 2012, 03:58 PM
Hi,

 The events that you could use in order to control selection are: 
SelectedCellsChanging and SelectionChanging.

In order to control the click on a row, I would suggest you the following way:

public MainWindow()
       {...
           this.RadGridView.CanUserSelect = false;
           this.AddHandler(FrameworkElement.MouseDownEvent, new System.Windows.Input.MouseButtonEventHandler(OnMouseDown), true);
       }
    
       private void OnMouseDown(object sender, MouseButtonEventArgs e)
       {
           var s = e.OriginalSource as FrameworkElement;
           var parentRow = s.ParentOfType<GridViewRow>();
           if (parentRow != null)
           {
           if (Keyboard.Modifiers == ModifierKeys.Control)
           {
               parentRow.IsSelected = false;
           }
           else
           {
               parentRow.IsSelected = true;
           }
    }
}

I hope this is helpful.

Greetings,
Didie
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Bob
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answered on 06 Jun 2012, 07:41 PM
This works quite well actually, thank you.  With some modifications I think I'll be able to use it as a stepping stone to achieve the behavior I'm looking for.

Thanks for your responses
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