厚度動畫麻煩？ （帶開始功能參數）

Question

有其上有一個按鈕和控制，並且還StackPanel的主框架上。試圖從XAML移動合作的動畫.CS我已經寫了下一個很酷的功能））：

private void ToggleButton_Checked(object sender, RoutedEventArgs e) 
     { 
int heightBottom = 100; 

System.Windows.Thickness th = stackPanel1.Margin; 
      th.Top = stackPanel1.Margin.Top + heightBottom; 
ThicknessAnimation animStackPanel1 = new ThicknessAnimation 
      { 
       From = stackPanel1.Margin, 
       To = th, 
       AccelerationRatio = 0.2, 
       FillBehavior = FillBehavior.Stop, 
       DecelerationRatio = 0.8, 
       Duration = DURATION 
      }; 
System.Windows.Thickness th2 = fxPSEditorView.Margin; 
      th2.Right = fxPSEditorView.Margin.Right - heightBottom; 
      th2.Bottom = fxPSEditorView.Margin.Bottom - heightBottom; 

      ThicknessAnimation animPSEditorView = new ThicknessAnimation 
      { 
       From = fxPSEditorView.Margin, 
       To = th2, 
       AccelerationRatio = 0.2, 
       FillBehavior = FillBehavior.Stop, 
       DecelerationRatio = 0.8, 
       Duration = DURATION 
      }; 
Storyboard.SetTarget(animPSEditorView, fxPSEditorView); 
      Storyboard.SetTargetProperty(fxPSEditorView, new PropertyPath(MarginProperty)); 
      sb.Children.Add(animPSEditorView); 
Storyboard.SetTarget(animStackPanel1, stackPanel1); 
      Storyboard.SetTargetProperty(stackPanel1, new PropertyPath(MarginProperty)); 
      sb.Children.Add(animStackPanel1); 
sb.Begin();//null reference error here! 
}; 

據我瞭解，我必須爲sb.Begin指定兩個參數 - 一個用於stackPanel1，另一個是fxPSEditorView。但是它不會將一組對象作爲第一個參數。 任何想法如何運行這個動畫將是很好的！謝謝

Answer 1

你並不需要兩個參數，但你應該通過它包含正在被動畫（這需要在相同的名稱，範圍）的控件。閱讀Begin(FrameworkElement)的文檔。