Silverlight 中 自定义的 ListBoxItem如何自适应ListBox的宽度

 1 <ListBox x:Name="xxx">
 2   <ListBox.ItemContainerStyle>
 3     <Style TargetType="ListBoxItem">
 4       <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
 5     </Style>
 6   </ListBox.ItemContainerStyle>
 7   <ListBox.ItemTemplate>
 8     <DataTemplate>
 9       <StackPanel>
10         <Grid>
11           <TextBlock Text="www.tech-labs.net" HorizontalAlignment="Left"/>
12           <TextBlock Text="维思实验室" HorizontalAlignment="Right"/>
13         </Grid>
14       </StackPanel>
15     </DataTemplate>
16   </ListBox.ItemTemplate>
17  </ListBox>