如何获取RowDetails里面的按钮控件？

Question

 RowDetailsTemplate：

<data:DataGrid.RowDetailsTemplate>
  <DataTemplate>
    <Border BorderThickness="10"  BorderBrush="Black" CornerRadius="6" HorizontalAlignment="Stretch" VerticalAlignment="Center" Margin="20 10 20 10">
      <Grid Background="White" HorizontalAlignment="Stretch" VerticalAlignment="Center" >
        <Grid.RowDefinitions>
          <RowDefinition Height="0.2*"/>
          <RowDefinition Height="0.2*"/>
          <RowDefinition Height="0.2*"/>
          <RowDefinition Height="0.2*"/>
          <RowDefinition Height="0.2*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
          <ColumnDefinition Width="Auto" />
          <ColumnDefinition Width="Auto" />
          <ColumnDefinition Width="Auto" />
          <ColumnDefinition Width="Auto" />
          <ColumnDefinition Width="Auto" />
       </Grid.ColumnDefinitions>
       <TextBlock Grid.Row="1" Grid.Column="0" Text="编 号：" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding pid}" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="1" Grid.Column="2" Text="类 型："  Margin="50 5 5 5"/>
       <TextBlock Grid.Row="1" Grid.Column="3" Text="{Binding ptype}" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="2" Grid.Column="0" Text="产 地："  Margin="50 5 5 5"/>
       <TextBlock Grid.Row="2" Grid.Column="1" Text="{Binding parea}" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="2" Grid.Column="2" Text="价 格："  Margin="50 5 5 5"/>
       <TextBlock Grid.Row="2" Grid.Column="3" Text="{Binding pprice}" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="3" Grid.Column="0" Text="描 述：" Margin="50 5 5 5"/>
       <TextBlock Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="3" Text="{Binding pexplian}" Margin="50 5 5 5"/>
       <Border Grid.RowSpan="4" Grid.Column="5" CornerRadius="5" BorderBrush="Black" BorderThickness="3" Margin="50 10 10 10">
         <Image x:Name="rowImage" Width="160" Height="160" Source="/GoodsSilverlight;Component/Imgs/test.jpg" Stretch="Fill" />
       </Border>
       <StackPanel Grid.Row="5" Grid.Column="5" Orientation="Horizontal" Margin="50 5 5 10">
         <Button x:Name="edButton"   Content="修 改 资 料" Width="80" Height="25" Margin="10" Opacity="0.8" Click="edButton_Click"/>
         <Button x:Name="levButton"  Content="收 起 页 面" Width="80" Height="25" Margin="10" Opacity="0.8" Click="levButton_Click"/>
       </StackPanel>
      </Grid>
    </Border>			
  </DataTemplate>
</data:DataGrid.RowDetailsTemplate>

为DataGrid添加LoadingRow事件里面，怎么获取每行显示的RowDetails里面两个按钮，为其赋予Tag值，然后为两个按钮写事件。不知道这样说能不能说清楚，请高手赐教。