Cannot open ContextMenu from inside DataGrid CellEditing Template?

[Rob]

I am having a problem trying to open a ContextMenu inside a DataGrid...

The following code works properly when it exists other places in my application.

<ToggleButton Grid.Column="1" Content="Click Me!" Height="20" Width="100" IsChecked="{Binding IsOpen, ElementName=rcm, Mode=TwoWay}" >
  <telerik:RadContextMenu.ContextMenu>
    <telerik:RadContextMenu x:Name="rcm" Placement="Bottom">
      <telerik:RadMenuItem Header="Item1" />
      <telerik:RadMenuItem Header="Item2" />
      <telerik:RadMenuItem Header="Item3" />
    </telerik:RadContextMenu>
  </telerik:RadContextMenu.ContextMenu>
</ToggleButton>

However if I place this code inside a DataGrid (specifically a CellEditingTemplate of a DataGridTemplateColumn, it does not work - i.e: the menu never opens.

<sdk:DataGrid RowHeight="100" AutoGenerateColumns="False" ItemsSource="{Binding Collection}" >
  <sdk:DataGrid.Columns>
    <sdk:DataGridTemplateColumn>
      <sdk:DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
          <TextBlock Foreground="Red" Text="{Binding Property1}" />
        </DataTemplate>
      </sdk:DataGridTemplateColumn.CellTemplate>
      <sdk:DataGridTemplateColumn.CellEditingTemplate>
        <DataTemplate>
          <Grid>
            <Grid.ColumnDefinitions>
              <ColumnDefinition Width="1*" />
              <ColumnDefinition Width="1*" />
            </Grid.ColumnDefinitions>
            <TextBox Foreground="Red" Text="{Binding Property1, Mode=TwoWay}" />
            <ToggleButton Grid.Column="1" Content="Button" Height="20" Width="100" IsChecked="{Binding IsOpen, ElementName=rcm, Mode=TwoWay}" >
              <telerik:RadContextMenu.ContextMenu>
                <telerik:RadContextMenu x:Name="rcm" Placement="Bottom" >
                  <telerik:RadMenuItem Header="Item1" />
                  <telerik:RadMenuItem Header="Item2" />
                  <telerik:RadMenuItem Header="Item3" />
                </telerik:RadContextMenu>
              </telerik:RadContextMenu.ContextMenu>
            </ToggleButton>
          </Grid>
        </DataTemplate>
      </sdk:DataGridTemplateColumn.CellEditingTemplate>
    </sdk:DataGridTemplateColumn>
  </sdk:DataGrid.Columns>
</sdk:DataGrid>

asdasd
asdasd

[Hristo]

Hello Rob,

This looks like problem in the DataGrid control. When RadContextMenu opens it will take focus so that keyboard navigation works but this cause DataGrid to think that edited row lost focus and will return the cells to cell template which will cause RadContextMenu to unload and close.

I will let you know if I find a workaround for this case.

Kind regards,
Hristo
the Telerik team