WPF DataTemplate Binding奇怪的问题

Question

大家好
我在DataTemplate中定义了一个Buton,然后给Button的Command调用一个路由命令，这样这个路由命令始终不会触发
但是我在DataTemplate外面定义一个Buton，同样的方式调用那个路由命令就可以了 
不知道这是为什么！

Answer 1

<DockPanel>
  <Canvas>
    <thriple:ContentControl3D  x:Name="Ctrl3D1">
    </thriple:ContentControl3D>
    <!--这里调用thriple:ContentControl3D.RotateCommand是可以触发的-->
    <Button Command="thriple:ContentControl3D.RotateCommand" 
            CommandTarget="{Binding ElementName=Ctrl3D1}"
    </Button>  </Canvas>
        
        
  <local:NodeCoorator x:Name="NodeContor1" Graph="{Binding Path=.}">
    <ItemsControl Background="DarkCyan" ItemsSource="{Binding Path=Nodes }">
      <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
          <jas:DragCanvas/>
        </ItemsPanelTemplate>
      </ItemsControl.ItemsPanel>                    
      <ItemsControl.ItemTemplate>
        <DataTemplate>
          <Border Width="30" Height="40">            <thriple:ContentControl3D  x:Name="Ctrl3D2">
            </thriple:ContentControl3D>
            
            <!--这里调用thriple:ContentControl3D.RotateCommand就不能触发的-->
            <Button Width="28" Height="18" 
                  Command="thriple:ContentControl3D.RotateCommand" 
                  CommandTarget="{Binding ElementName=Ctrl3D2}">
            </Button>
                                    
           </Border>
         </DataTemplate>
       </ItemsControl.ItemTemplate>    </ItemsControl>
  </local:NodeConnectionAdornerDecorator>
</DockPanel>

Answer 2

WPF还在我的学习计划中，现在只能帮忙顶了！

Answer 3

this is because 
<ItemsControl Background="DarkCyan" ItemsSource="{Binding Path=Nodes }">
you already bind an object,  I guess<Button Width="28" Height="18" 
  Command="thriple:ContentControl3D.RotateCommand" 
  CommandTarget="{Binding ElementName=Ctrl3D2}">
  </Button>the binding target is not included in Nodes