C#WPF自定义控件在设计时没有响应XAML属性？

我创建了一个UserControl,它本质上是一个按钮.它上面有一个Image和一个Label,我创建了两个属性来设置Image的源和Label的文本,如下所示:

        public ImageSource Icon
    {
        get { return (ImageSource)this.GetValue(IconProperty); }
        set { this.SetValue(IconProperty, value); icon.Source = value; }
    }
    public static readonly DependencyProperty IconProperty = DependencyProperty.Register("Icon", typeof(ImageSource), typeof(NavigationButton));

    public string Text
    {
        get { return (string)this.GetValue(TextProperty); }
        set { this.SetValue(TextProperty, value); label.Content = value; }
    }

    public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(NavigationButton));

但是,当我将控件添加到我的页面时,控件不会响应我在XAML中设置的任何属性,例如public ImageSource Icon { get { return (ImageSource)this.GetValue(IconProperty); } set { this.SetValue(IconProperty, value); } } public static readonly DependencyProperty IconProperty = DependencyProperty.Register("Icon", typeof(ImageSource), typeof(NavigationButton), new FrameworkPropertyMetadata(OnIconChanged)); private static void OnIconChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e) { //do whatever you want here - the first parameter is your DependencyObject }

编辑

public YourControl()
{
    InitializeComponent();
    //bindings without an explicit source will look at their DataContext, which is this control
    DataContext = this;
}