當我們要顯示一個控件的時候，不僅僅要顯示這個控件，還要有動畫的效果。

主要用到了DoubleAnimation類。

 public static void ShowAnimation(object control)
        {
            Type type = control.GetType();
            switch (type.Name)
            {
                case "Border":
                    {
                        Border newBorder 
 
= (Border)control;
                        #region 高、寬變化動畫

                        DoubleAnimation widthAnimation = new DoubleAnimation(0, newBorder.Width, new Duration(TimeSpan.FromSeconds(0.5)));
                        newBorder.BeginAnimation(Border.WidthProperty, widthAnimation, HandoffBehavior.Compose);

                        DoubleAnimation heightAnimation 
 
= new DoubleAnimation(0, newBorder.Height, new Duration(TimeSpan.FromSeconds(0.5)));
                        newBorder.BeginAnimation(Border.HeightProperty, heightAnimation, HandoffBehavior.Compose);
                        #endregion
                    }
                    break;

                
 
default:
                    break;
            }
        }

調用的時候也簡單。

private void button_Click(object sender, RoutedEventArgs e)
        {
            bord1.Visibility = Visibility.Visible;
            ShowAnimation(bord1);
        }

效果如下：

WPF 動畫顯示控件