你如何從不同的線索開始故事板？

Question

問題

我試圖從不同的線程播放StoryBoard，但在WindowsBase.dll中引發'System.InvalidOperationException'。

我有一個自定義控制，InfoBar，它有一個StoryBoard關閉它和一個System.Timers.Timer對象要幾秒鐘後這樣做。

那麼，如何從另一個線程調用BeginStoryboard()？

錯誤消息

扔在BeginStoryboard(sb)的異常：

An exception of type 'System.InvalidOperationException' occurred in WindowsBase.dll but was not handled in user code

Additional information: The calling thread cannot access this object because a different thread owns it.

我（簡化）代碼

private int TimerSeconds; 
private System.Timers.Timer t; 

public InfoBar() 
{ 
    this.InitializeComponent(); 
    TimerSeconds = 0; 
    t = new System.Timers.Timer(1000); 
    t.Elapsed += t_Elapsed; 
} 

void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e) 
{ 
    if(TimerSeconds==3) 
    { 
     t.Stop(); 
     TimerSeconds = 0;  
     System.Windows.Media.Animation.Storyboard sb = (System.Windows.Media.Animation.Storyboard)FindResource("sbClose"); 
     BeginStoryboard(sb);  
    } 
    else 
    { 
     TimerSeconds++; 
    } 
} 

Answer 1

把代表對UI dispatcher它會自動把你的東西到UI線程。你只能在UI線程上做UI的東西。

App.Current.Dispatcher.Invoke((Action)delegate 
{ 
     System.Windows.Media.Animation.Storyboard sb = 
      (System.Windows.Media.Animation.Storyboard)FindResource("sbClose"); 
     BeginStoryboard(sb); 
});