当页面的数据上下文用于其他绑定时，如何绑定到 WPF 依赖项属性？
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How to bind to a WPF dependency property when the datacontext of the page is used for other bindings?
提问by Thomas Bratt
How to bind to a WPF dependency property when the datacontext of the page is used for other bindings? (Simple question)
当页面的数据上下文用于其他绑定时，如何绑定到 WPF 依赖项属性？（简单的问题）
回答by Thomas Bratt
The datacontext of the element needed to be set.
需要设置的元素的数据上下文。
XAML:
XAML：
<Window x:Class="WpfDependencyPropertyTest.Window1" x:Name="mywindow">
<StackPanel>
<Label Content="{Binding Path=Test, ElementName=mywindow}" />
</StackPanel>
</Window>
C#:
C＃：
public static readonly DependencyProperty TestProperty =
DependencyProperty.Register("Test",
typeof(string),
typeof(Window1),
new FrameworkPropertyMetadata("Test"));
public string Test
{
get { return (string)this.GetValue(Window1.TestProperty); }
set { this.SetValue(Window1.TestProperty, value); }
}
Also see this related question:
另请参阅此相关问题：
回答by itowlson
In XAML:
在 XAML 中：
Something="{Binding SomethingElse, ElementName=SomeElement}"
In code:
在代码中：
BindingOperations.SetBinding(obj, SomeClass.SomethingProperty, new Binding {
Path = new PropertyPath(SomeElementType.SomethingElseProperty), /* the UI property */
Source = SomeElement /* the UI object */
});
Though usually you will do this the other way round and bind the UI property to the custom dependency property.
尽管通常您会反过来执行此操作并将 UI 属性绑定到自定义依赖项属性。
