如何正确停止以编程方式声明的故事板

Question

我有一个WPF应用程序，当数据源中的值已更新并且工作正常时，它会执行单元格闪烁。

我注意到，当我执行更新的应用程序分析真的很快，内存越来越大。由于我以这种方式启动故事板

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(); 
      } 
     } 
    } 

我怀疑我必须停止动画，但我不知道我该怎么做呢？

感谢

Answer 1

从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

的问题是，你每次都创建一个新的故事板，而不是项目变化重新使用现有的一个：

var sb = new Storyboard(); 

如果你真的必须这样做，那么你需要处理的情节提要完成事件并将其从小区中移除。