Checkbox in Header

[Betsy]

WPF 4.0, VB, 2010.3.110.40

If I put a button in the Header and click on it the IsExpanded property of the expander does not change (as I expected).
If I put a checkbox in the Header and click on it the IsExpanded property DOES change (as well as the IsChecked of the checkbox.  How can I have a checkbox in my header but not have it process as if the Expander Headerbar was clicked?

<telerik:RadExpander IsExpanded="True">
  <telerik:RadExpander.Header>
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="*" />
      </Grid.ColumnDefinitions>
      <Label Content="Filter Options" />
      <Button Grid.Column="1" Content="Test" />
      <CheckBox Name="showgrouppanel" Content="Show GroupBy Area" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Right" />
    </Grid>
  </telerik:RadExpander.Header>

[Petar Mladenov]

Hi Heather,

Unfortunately, this appears to be a bug in the RadExpander. I have logged it in our PITS system ( Expander: Checkbox in the Expander`s Header fires the Expand/Collapse event of the expander). I updated your points accordingly.

Greetings,
Petar Mladenov
the Telerik team

[David]

I am having the same issue with a ComboBox in the header of an Expander. I was hoping to get a status update on this issue. We're hoping to launch a product at the beginning of April and would really like to be able to use this particular UI.

[Tina Stancheva]

Hello David,

The issue should be fixed with the upcoming Q1 2011 official release. I hope this time frame is acceptable for you.

Regards,
Tina Stancheva
the Telerik team