具有DataContext和DependencyProperty的UserControl

本文介绍了具有DataContext和DependencyProperty的UserControl的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想将DependencyProperty和DataContext绑定到我的UserControl。 DataContext工作正常，但是设置DependencyProperty无效。这是我的UserControl：

I want to bind a DependencyProperty and DataContext to my UserControl. DataContext is working, but Setting the DependencyProperty has no effect. This is my UserControl:

<MyProperty:MyPropertyControl DataContext="{Binding SelectedPerson}" IsEnabled="True"/>

这是我的UserControl的代码背后：

And this is the CodeBehind of my UserControl:

public static readonly DependencyProperty IsEnabledProperty = DependencyProperty.Register( "IsEnabled", typeof(Boolean), typeof(MyProperty:MyPropertyControl), new FrameworkPropertyMetadata() { DefaultValue = false, BindsTwoWayByDefault = false, DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged, }); public MyPropertyControl() { InitializeComponent(); } public Boolean IsEnabled { get { return (Boolean)GetValue(IsEnabledProperty); } set { SetValue(IsEnabledProperty, value); NotifyPropertyChanged("IsEnabled"); } }

我可以将属性IsEnabled设置为true或false，

I can set the property IsEnabled to true or false, but it has no effect.

用户控制代码：

<Button Content="Test" Width="100" Height="30" IsEnabled="{Binding IsEnabled}" />

推荐答案

您必须设置绑定到UserControl，例如像这样：

You'll have to set the source object of the Binding to the UserControl, e.g. like this:

<Button ... IsEnabled="{Binding IsEnabled, RelativeSource={RelativeSource AncestorType=UserControl}}" />