Binding RelativeSource={
    RelativeSource Mode=FindAncestor, AncestorType={x:Type ItemType}
}
...

RelativeSource的默认属性是Mode属性。这里给出了一组完整的有效值(来自MSDN):

PreviousData Allows you to bind the previous data item (not that control that contains the data item) in the list of data items being displayed. TemplatedParent Refers to the element to which the template (in which the data-bound element exists) is applied. This is similar to setting a TemplateBindingExtension and is only applicable if the Binding is within a template. Self Refers to the element on which you are setting the binding and allows you to bind one property of that element to another property on the same element. FindAncestor Refers to the ancestor in the parent chain of the data-bound element. You can use this to bind to an ancestor of a specific type or its subclasses. This is the mode you use if you want to specify AncestorType and/or AncestorLevel.

我没有阅读每个答案，但我只是想添加这个信息，以防按钮的相对源命令绑定。

当你使用Mode= find祖宗的相对源时，绑定必须像这样:

Command="{Binding Path=DataContext.CommandProperty, RelativeSource={...}}"

如果你没有在你的路径中添加DataContext，在执行时它不能检索属性。

Binding RelativeSource={
    RelativeSource Mode=FindAncestor, AncestorType={x:Type ItemType}
}
...

RelativeSource的默认属性是Mode属性。这里给出了一组完整的有效值(来自MSDN):

PreviousData Allows you to bind the previous data item (not that control that contains the data item) in the list of data items being displayed. TemplatedParent Refers to the element to which the template (in which the data-bound element exists) is applied. This is similar to setting a TemplateBindingExtension and is only applicable if the Binding is within a template. Self Refers to the element on which you are setting the binding and allows you to bind one property of that element to another property on the same element. FindAncestor Refers to the ancestor in the parent chain of the data-bound element. You can use this to bind to an ancestor of a specific type or its subclasses. This is the mode you use if you want to specify AncestorType and/or AncestorLevel.

值得注意的是，对于那些无意中发现Silverlight的想法的人:

Silverlight只提供了这些命令的一个简化子集

下面是MVVM架构的一个更直观的解释:

一些有用的小片段:

以下是如何主要在代码中做到这一点:

Binding b = new Binding();
b.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, this.GetType(), 1);
b.Path = new PropertyPath("MyElementThatNeedsBinding");
MyLabel.SetBinding(ContentProperty, b);

我很大程度上复制了这从绑定相对源在代码后面。

同样，就示例而言，MSDN页面也很不错:RelativeSource Class