Telerik Silverlight RadGridView-需要单击两次按钮

除了UI行为,其他一切都正常工作。

简化的XAML:

<StackPanel Orientation="Horizontal">
  <Button Content="Save" Command="{Binding SaveCommand}" />
  <Button Content="Close" Command="{Binding CloseCommand}" />
</StackPanel>
<telerik:RadGridView ItemsSource="{Binding StockItems,Mode=TwoWay}"
                     AutoGenerateColumns="False"
                     IsFilteringAllowed="False"
                     ShowGroupPanel="False">
  <telerik:RadGridView.Columns>
    <telerik:GridViewDataColumn DataMemberBinding="{Binding LabelGroup,Mode=TwoWay}"
                                Header="Label Group" />
    <telerik:GridViewDataColumn DataMemberBinding="{Binding Message,Mode=TwoWay}"
                                Header="Message" />
  </telerik:RadGridView.Columns>
</telerik:RadGridView>

吉姆