WPF中全局开启或关闭动画效果

公司开发的WPF项目中，要求有这样一个业务：用户可以开启或关闭动画效果。WPF的绚丽之处就是3D、动画、特效等等，给人非常炫的感觉，但是机器配置较差的用户可能需要关闭动画特效。
我甚至遇到一个3D特效在显卡不好机器上，导致应用程序崩溃的情况。可见WPF对机器的要求还是比较高的。如果才能做到呢？需要以下几步就能轻松完成。

初始状态：

鼠标移动到矩形上颜色更改


1.建立两个资源字典，分别为Storyboards.xaml和NonStoryboards.xaml
见项目文件截图：

Storyboards.xaml里放有动画的内容
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Storyboard x:Key="Storyboard1"> <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="rectangle"> <EasingColorKeyFrame KeyTime="0:0:0.5" Value="Yellow"/> </ColorAnimationUsingKeyFrames> </Storyboard> <Storyboard x:Key="Storyboard2"> <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="rectangle"> <EasingColorKeyFrame KeyTime="0" Value="Yellow"/> <EasingColorKeyFrame KeyTime="0:0:0.5" Value="#FF6B6B9B"/> </ColorAnimationUsingKeyFrames> </Storyboard> </ResourceDictionary>
NonStoryboards.xaml里放有没有动画的内容，并保证Key一致
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Storyboard x:Key="Storyboard1"> </Storyboard> <Storyboard x:Key="Storyboard2"> </Storyboard> </ResourceDictionary>

2.在App.xaml.cs增加一个静态方法，加载资源字典，定义在App中，好处是应用程序级别设置，而不是针对某个窗体
using System; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Linq; using System.Windows; namespace AnimationSwitch { /// <summary> /// App.xaml 的交互逻辑 /// </summary> public partial class App : Application { protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); App.LoadResources(true); } public static void LoadResources(bool allowStoryboard) { string resFilename = "/Res/" + (allowStoryboard ? "Storyboards.xaml" : "NonStoryboards.xaml"); ResourceDictionary resDic = new ResourceDictionary { Source = new Uri(resFilename, UriKind.Relative) }; Application.Current.Resources.MergedDictionaries.Clear(); Application.Current.Resources.MergedDictionaries.Add(resDic); } } }

3.在窗体设置对象与对象的动画，以及动画效果的CheckBox开关
这里要注意的是：Storyboard="{DynamicResource Storyboard1}必须使用DynamicResource（动态资源），如果使用了StaticResource则第一次加载后，不会更改。
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="AnimationSwitch.MainWindow" Title="MainWindow" Height="350" Width="525"> <Window.Resources> </Window.Resources> <Window.Triggers> <EventTrigger RoutedEvent="Mouse.MouseEnter" SourceName="rectangle"> <BeginStoryboard Storyboard="{DynamicResource Storyboard1}"/> </EventTrigger> <EventTrigger RoutedEvent="Mouse.MouseLeave" SourceName="rectangle"> <BeginStoryboard Storyboard="{DynamicResource Storyboard2}"/> </EventTrigger> </Window.Triggers> <Grid> <Rectangle x:Name="rectangle" HorizontalAlignment="Left" Margin="79,43,0,0" Stroke="Black" Width="162" Fill="#FF6B6B9B" Height="99" VerticalAlignment="Top" RadiusY="22.5" RadiusX="22.5" d:LayoutOverrides="VerticalAlignment" /> <CheckBox Content="动画效果" HorizontalAlignment="Left" Margin="99,178,0,0" VerticalAlignment="Top" IsChecked="True" Width="80" Click="CheckBox_Click" /> </Grid> </Window>
CheckBox事件：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace AnimationSwitch { /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void CheckBox_Click(object sender, RoutedEventArgs e) { CheckBox checkBox=sender as CheckBox; App.LoadResources(checkBox.IsChecked.Value); } } }

到此大功告成！
源代码下载：http://download.csdn.net/source/3349597

来源：CSDN

作者：qing2005

链接：https://blog.csdn.net/qing2005/article/details/6532918