C#如何保证一个WPF控件的满载

Question

我有一个添加了自定义行为的控件。

该行为有两个 DependencyProperties:

public SomeObject Player {
    get { return (e)GetValue(PlayerProperty); }
    set { SetValue(PlayerProperty, value); }
}

// Using a DependencyProperty as the backing store for Player.  This enables animation, styling, binding, etc...
public static readonly DependencyProperty PlayerProperty =
    DependencyProperty.Register("Player", typeof(IVideoPlayerDTO), typeof(PlayerStreamBehavior), new UIPropertyMetadata(null));

public IntPtr Handle {
    get { return (IntPtr)GetValue(HandleProperty); }
    set { SetValue(HandleProperty, value); }
}

// Using a DependencyProperty as the backing store for Handle.  This enables animation, styling, binding, etc...
public static readonly DependencyProperty HandleProperty =
        DependencyProperty.Register("Handle", typeof(IntPtr), typeof(PlayerStreamBehavior), new UIPropertyMetadata(IntPtr.Zero, OnHandleChanged));

每个都绑定(bind)到 WPF 中的某个对象。问题在于，在具有该行为的控件完全加载之前，Handle 属性的 OnHandleChanged 被激活，这会在尝试向控件添加 HwndHost 时引发异常。在尝试添加 HwndHost 之前如何确保控件已完全加载？P.s: 尝试使用 OnAttached()，但这没有用...

Answer 1

试试这个:

public MyControl()
{
    this.Loaded += MyControl_Loaded;
}

private void MyControl_Loaded(object sender, RoutedEventArgs e)
{
   // Control is full loaded
}