Why won't IsChecked change on this toggle button?

Posted by cjroebuck on Stack Overflow See other posts from Stack Overflow or by cjroebuck
Published on 2011-01-06T17:47:05Z Indexed on 2011/01/06 17:53 UTC
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wpf

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togglebutton

|

ischecked

I have the following xaml for a toggle button:

<ToggleButton Margin="0,3" Grid.Row="3" Grid.ColumnSpan="2" Command="{Binding DataContext.SelectAllCommand, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}">
  <ToggleButton.Style>
   <Style TargetType="{x:Type ToggleButton}">
       <Setter Property="Content" Value="Select All"/>
       <Style.Triggers>
            <Trigger Property="IsChecked" Value="True">
                <Setter Property="Content" Value="Select None"/>
                <Setter Property="Command" Value="{Binding DataContext.SelectNoneCommand, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"/>
            </Trigger>
          </Style.Triggers>
      </Style>
  </ToggleButton.Style>
</ToggleButton>

But the IsChecked property never gets updated when clicking the button.

If I use snoop and force the IsChecked to True then the trigger kicks in.

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