如何正確停止以編程方式聲明的故事板

Question

我有一個WPF應用程序，當數據源中的值已更新並且工作正常時，它會執行單元格閃爍。

我注意到，當我執行更新的應用程序分析真的很快，內存越來越大。由於我以這種方式啓動故事板

private static DoubleAnimation blink = 
     new DoubleAnimation() 
     { 
      From = 0, 
      To = 1, 
      Duration = TimeSpan.FromSeconds(0.2), 
      FillBehavior = FillBehavior.Stop 
     }; 
private void Items_ItemChanged(object sender, ItemChangedEventArgs<ExpandoObject> e) 
    { 
     var club = e.Item; 
     var row = grid.ItemContainerGenerator.ContainerFromItem(club) as Telerik.Windows.Controls.GridView.GridViewRow; 
     if (row != null) 
     { 
      var column = grid.Columns[e.PropertyName]; 
      var cell = row.Cells.FirstOrDefault(c => c.Column == column); 
      if (cell != null) //In case of virtualization I won't have all the columns 
      { 
       Storyboard.SetTarget(blink, cell.Content as TextBlock); 
       Storyboard.SetTargetProperty(blink, new PropertyPath(Button.OpacityProperty)); 
       var sb = new Storyboard(); 
       sb.Children.Add(blink); 
       sb.Begin(); 
      } 
     } 
    } 

我懷疑我必須停止動畫，但我不知道我該怎麼做呢？

感謝

Answer 1

從Items_ItemChanged取出Storyboard。

Storyboard sb = new Storyboard(); 
    private void Items_ItemChanged(object sender, ItemChangedEventArgs<ExpandoObject> e) 
    { 
     sb.Stop(); 
     sb.Children.Clear(); 

     sb.Children.Add(blink); 

     var club = e.Item; 
     var row = grid.ItemContainerGenerator.ContainerFromItem(club) as Telerik.Windows.Controls.GridView.GridViewRow; 
     if (row != null) 
     { 
      var column = grid.Columns[e.PropertyName]; 
      var cell = row.Cells.FirstOrDefault(c => c.Column == column); 
      if (cell != null) //In case of virtualization I won't have all the columns 
      { 
       Storyboard.SetTarget(blink, cell.Content as TextBlock); 
       Storyboard.SetTargetProperty(blink, new PropertyPath(Button.OpacityProperty)); 

       sb.Begin(); 
      } 
     } 
    } 

Answer 2

的問題是，你每次都創建一個新的故事板，而不是項目變化重新使用現有的一個：

var sb = new Storyboard(); 

如果你真的必須這樣做，那麼你需要處理的情節提要完成事件並將其從小區中移除。