C＃如何確保一個WPF控件的全部負載

Question

我有一個控件，我添加了一個自定義行爲。

行爲有兩個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)); 

每一個綁定到WPF中某些對象。 問題是，Handle屬性的OnHandleChanged在具有行爲的控件完全加載之前被激活，這會在嘗試向控件添加HwndHost時引發異常。 我如何確保在我嘗試添加HwndHost之前控件已完全加載？ P.S：儘量選用OnAttached()，然而這並沒有工作...

Answer 1

試試這個：

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

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