复杂的DataTemplate

Question

我在这里实现了 CustomDataTemplateSelector ：Implementing Windows Phone 7 DataTemplateSelector and CustomDataTemplateSelector。但在我的解决方案中，只有一个部分在所有DataTemplates中发生变化，DataTemplates的其他部分很常见：

<local:MyTemplateSelector Content="{Binding}">
    <local:MyTemplateSelector.OneTemplate>
        <DataTemplate>
            <Grid Orientation="Horizontal" >
                <Grid x:Name="Grid1">
                    <Image Height="60" Width="60" Source="{Binding Photo}"/>
                </Grid>
                <Grid>
                    <TextBlock Text="{Binding TextValue1}">
                    <TextBlock Text="{Binding TextValue2}">
                </Grid>
            </Grid>
        </DataTemplate>
    </local:MyTemplateSelector.OneTemplate>
    <local:MyTemplateSelector.AnotherTemplate>
        <DataTemplate>
            <Grid Orientation="Horizontal" >
                <Grid x:Name="Grid2">
                    <Image Height="30" Width="60" Source="{Binding Photos[0]}"/>
                    <Image Height="30" Width="60" Source="{Binding Photos[1]}"/>
                </Grid>
                <Grid>
                    <TextBlock Text="{Binding TextValue1}">
                    <TextBlock Text="{Binding TextValue2}">
                </Grid>
            </Grid>
        </DataTemplate>
    </local:MyTemplateSelector.AnotherTemplate>
</local:MyTemplateSelector>

这里 Grid1 和 Grid2 是不同的部分。是否可以“拆分”这些DataTemplates？

Answer 1

尝试将您的公共部分声明为Resource并将其绑定到ContentPresenter：

<DataTemplate x:Key="CommonPart">
   <Grid >
      <TextBlock Text="{Binding TextValue1}">
      <TextBlock Text="{Binding TextValue2}">
   </Grid>
</DataTemplate>

<local:MyTemplateSelector Content="{Binding}">
<local:MyTemplateSelector.OneTemplate>
<DataTemplate>
   <Grid Orientation="Horizontal" >
      <Grid x:Name="Grid1">
         <Image Height="60" Width="60" Source="{Binding Photo}"/>
      </Grid>
      <ContentPresenter ContentTemplate="{StaticResource CommonPart}" />                
   </Grid>
</DataTemplate>
</local:MyTemplateSelector.OneTemplate>
<local:MyTemplateSelector.AnotherTemplate>
<DataTemplate>
   <Grid Orientation="Horizontal" >
      <Grid x:Name="Grid2">
         <Image Height="30" Width="60" Source="{Binding Photos[0]}"/>
         <Image Height="30" Width="60" Source="{Binding Photos[1]}"/>
      </Grid>
      <ContentPresenter ContentTemplate="{StaticResource CommonPart}" /> 
   </Grid>
</DataTemplate>
</local:MyTemplateSelector.AnotherTemplate>
</local:MyTemplateSelector>