Cancelling Grouping and Grouped

[ErrolM]

Hello folks,

I read in http://www.telerik.com/help/silverlight/gridview-events-grouping.html that Grouping can be selectively canceled by setting cancel=true. I was not expecting the Grouped event to fire when I canceled but in my situation it does.

Is this by design or could I be doing something additional that causes the Grouped event to fire?

Cheers,
Errol

[Vanya Pavlova]

Hello Errol,

 

May you please elaborate a little bit more about your current settings?
As described in our online documentation you may disable grouping functionality within RadGridView's Grouping event handler as shown below:

private void RadGridView_Grouping(object sender, Telerik.Windows.Controls.GridViewGroupingEventArgs e)
      {
         e.Cancel=true;
      }

Using this snippet you will not be able to perform grouping in RadGridView.
I believe that there is something specific in your case. Any additional information will be highly appreciated.

Regards,
Vanya Pavlova
the Telerik team

[Christian]

Hi,
I have the same issue.
I have a RadGridView listening two events: Grouping & Grouped.
When I cancel the grouping in the Grouping event, the grid doesn't continue with the grouping, but the Grouped event always is fired.
How I can know, in the Grouped event, if the grouping was cancelled in the previous event?

Thanks,
Christian

[Nick]

Hi Chistian,

Here is a simple approach you can take:

void GridView_Grouped(object sender, Telerik.Windows.Controls.GridViewGroupedEventArgs e)
{
    if (this.isGroupingCanceled)
    {
        this.isGroupingCanceled = false;
        return;
    }
}

private bool isGroupingCanceled = false;
private int counter = 0;
void GridView_Grouping(object sender, Telerik.Windows.Controls.GridViewGroupingEventArgs e)
{
    if (counter++ % 2 == 0)
    {
        e.Cancel = this.isGroupingCanceled = true;
    }
}

Hope it helps!  Greetings,
Nik
the Telerik team

[Christian]

Hi Nick,

Thanks for your suggestion; it's a little clumsy, but works.