Silverlight - 使用 MVVM 动态地将椭圆添加到 Canvas

Question

我想在 Canvas 上添加动态数量的椭圆并设置椭圆位置(canvas.top、canvas.left)。我尝试绑定(bind)到 ItemsControl，但它的每个项目(椭圆)都有一个容器，所以我无法直接设置省略号的位置。我不想要一个项目容器，我只想要一个包含省略号的 Canvas 。

这可以做到吗？

Answer 1

试试这个 - 对我有用 - 我用它在 Canvas 上自由放置文本 block 。

Re: Re: Positioning Items when Canvas is the ItemsPanel of an ItemsControl 02-26-2010 7:17 AM |

There is an alternative simpler solution that does work in silverlight 3.

 
 <Canvas>
  <ItemsControl ItemsSource={Binding MyItems}>
    <ItemsControl.ItemTemplate>
      <DataTemplate>
        <Canvas>
          <TextBlock Canvas.Left={Binding Left} Canvas.Top={Binding Top} Text={Binding Text} />
        </Canvas>
      </DataTemplate>
    </ItemsControl.ItemTemplate>
  </ItemsControl>
</Canvas>

If the MyItems is a list of items that are of a class that has Left, Top and Text public properties, this works fine. I have also tested with Line and Border to draw simple bar graph graphics in silverlight 3.

从这篇文章的底部: http://forums.silverlight.net/forums/p/29753/450510.aspx#450510

将它与 Silverlight DataTemplateSelector 结合使用，您可以根据 View 模型属性更改绘制的对象:

http://www.codeproject.com/KB/silverlight/SLTemplateSelector.aspx