绑定到WPF中的祖先 [英] Binding to an ancestor in WPF

问题描述

我在一个程序集中有一个窗口，它有一个TextBlock控件，我想绑定到一个属性的属性值，该属性是该Windows父属的DataContext的属性。作为DataContext的类只在第二个程序集中定义。我的问题是我需要指定什么类型作为我的约束语句中的类型。我可以使用DataContext属性在两个程序集之间通用的属性，还是需要使用DataContext的类型？

下面是一个原型我认为它应该工作，但由于我不是很困惑的东西：）

装配＃1

窗口

 < TextBlock 
 Text ={Binding RelativeSource = {RelativeSource 
 AncestorType = {x ：键入client：Client}}，Path = Name}/> 
  

程序集＃2

应用程序Shell

  class Shell 
 {
 public Client Client {get {return client; } set {client = value; }} 
 OnStartup（）
 {
 NavigationWindow window = new NavigationWindow（）; 
 window.DataContext = this; 
 window.Navigate（GetHomeView（））; 
} 
} 
  

解决方案

以下应该工作：

 < TextBlock Text ={Binding RelativeSource = {RelativeSource Mode = FindAncestor，
 AncestorType = {x：Type Window}}，
 Path = DataContext.Client.Name}/> 
  

I have a window in one assembly that has a TextBlock control that I want to bind to the value of a Property of a class that is the property of the DataContext of that windows parent. The class that is serving as the DataContext is only defined within the second assembly. My question is what type do I need to specify as the Type in my binding statement. Can I just use the type of the DataContext's property that is common between the two assemblies or do I need to use the type of the DataContext?

The below is a prototype of how I think it should work but since it isn't I am confused about something :)

Assembly #1
Window

<TextBlock 
    Text="{Binding RelativeSource={RelativeSource 
        AncestorType={x:Type client:Client}}, Path=Name }"/>

Assembly #2
Application Shell

class Shell 
{
     public Client Client { get { return client; } set { client = value; } }
     OnStartup()
     {
          NavigationWindow window = new NavigationWindow();
          window.DataContext = this;
          window.Navigate(GetHomeView());
     }
}

解决方案

the following should work :

<TextBlock Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor,
                                                         AncestorType={x:Type Window}},
                                                         Path=DataContext.Client.Name}" />

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