WPF:StackPanel中的不同内容取决于DataContext的类型 [英] WPF: Different content in StackPanel dependent on the DataContext's type

问题描述

大家好！
自上次WPF代码以来已经过去了很长时间，所以这可能是一个简单的问题，我只是不知道答案.
我有一个包含不同类型的TreeView:里程碑，问题，ProjectTask 等.
现在，取决于所选的项目，我想填充一个信息面板.
我想到了这样的东西:

Hello guys!
It''s a pretty long time since my last WPF code, so this is probably an easy question I just don''t know the answer to.
I have a TreeView that contains different types: Milestone, Issue, ProjectTask, etc.
Now dependent on the selected item I want to get an info panel filled.
I thought of something like this:

<StackPanel Orientation="Vertical" Grid.Column="1" DataContext="{Binding ElementName=ProjectTaskTreeView, Path=SelectedItem}">
    <TextBlock Text="{Binding Id}"></TextBlock>
</StackPanel>

这对于问题来说很好用，但是当我选择 MileStone 时，我想显示属性 DisplayText 而不是 Id >和另一个附加的TextBlock.
如何以最简单"或最佳实践"的方式实现这一目标?
是否可能与以下内容类似?

This works fine for an Issue, but when I select a MileStone I want to show the property DisplayText instead of Id and another additional TextBlock.
How can I achieve this the "most easy" or "best practice" way?
Is something similar to the following possible?

<StackPanel Orientation="Vertical" Grid.Column="1" DataContext="{Binding ElementName=ProjectTaskTreeView, Path=SelectedItem}">
 <Content DataType="...Issue...">
  <TextBlock Text="{Binding Id}"></TextBlock>
 </Content>
 <Content DataType="...MileStone...">
  <TextBlock Text="{Binding DisplayText}"></TextBlock>
  <TextBlock Text="{Binding AnotherPropertyOfMileStone}"></TextBlock>
 </Content>
</StackPanel>

谢谢你的帮助！ Markus

Thanks for your help! Markus

推荐答案

因此，我在这里找到了针对我的问题的解决方案:

So, I found a solution for my question here: http://stackoverflow.com/questions/1152128/wpf-databind-to-a-stackpanel-using-datatemplates[^]

Replacing the StackPanel with a ContentPresenter and instead of DataContext using the Content property worked for me.

Probably it will help someone else :)

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