<DataGrid 
          ItemsSource="{Binding ItemsSource}"
          Style="{StaticResource DataGridStyle}"
          SelectedItem="{Binding SelectedItem}"
          ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}"
          RowStyle="{StaticResource CapResultStyle}"
          >
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseDoubleClick">
            <i:InvokeCommandAction
                Command="{Binding DataContext.QueryCmd,
              RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"/>
        </i:EventTrigger>
　　</i:Interaction.Triggers>
    <DataGrid.Columns>
        <DataGridTextColumn Header="序号" Width="60" Binding="{Binding Disp}"
                     ElementStyle="{StaticResource DataGridContentCenterSytle}" />
        <DataGridTextColumn Header="时间" Width="160" Binding="{Binding DateTime}"
                     ElementStyle="{StaticResource DataGridContentCenterSytle}" />
        <DataGridTextColumn Header="处理结果" Width="80" 
　　　　　　　　　　　　Binding="{Binding ResultStr}"
　　　　　　　　　　　　ElementStyle="{StaticResource DataGridContentCenterSytle}"/>　　　　 </DataGrid.Columns> 

</DataGrid>