C# WPF实现动画渐入暗黑明亮主题切换效果

**WPF 动画渐入暗黑明亮主题切换效果**

在 WPF 应用程序中，主题是指应用程序的外观和感觉。暗黑主题和明亮主题是两种常见的主题风格。在本文中，我们将使用 C# 和 WPF 来实现动画渐入暗黑明亮主题切换效果。

**主题定义**

首先，我们需要定义两个主题：暗黑主题和明亮主题。我们可以使用 XAML 文件来定义这些主题。

xml
 
 



 
 

csharp// ThemeAnimator.csusing System.Windows;
using System.Windows.Media.Animation;

public class ThemeAnimator : DependencyObject{
 public static readonly DependencyProperty ThemeProperty = DependencyProperty.RegisterAttached(
 "Theme",
 typeof(string),
 typeof(ThemeAnimator),
 new FrameworkPropertyMetadata("Dark", FrameworkPropertyMetadataOptions.Inherits));

 public static string GetTheme(DependencyObject dependencyObject)
 {
 return (string)dependencyObject.GetValue(ThemeProperty);
 }

 public static void SetTheme(DependencyObject dependencyObject, string value)
 {
 dependencyObject.SetValue(ThemeProperty, value);
 }

 public static void ChangeTheme(object sender, RoutedEventArgs e)
 {
 var theme = GetTheme(sender as FrameworkElement);
 if (theme == "Dark")
 {
 SetTheme(sender as FrameworkElement, "Light");
 }
 else {
 SetTheme(sender as FrameworkElement, "Dark");
 }

 // 动画效果 var storyboard = new Storyboard();
 var animation = new ColorAnimation(Colors.Black, Colors.White, TimeSpan.FromSeconds(1));
 Storyboard.SetTarget(animation, sender as FrameworkElement);
 Storyboard.SetTargetProperty(animation, new PropertyPath("(0).(1)"));
 storyboard.Children.Add(animation);
 storyboard.Begin();
 }
}

xml
 Title="WPF Theme Switcher" Height="350" Width="525">
 
 
 


// MainWindow.xaml.csusing System.Windows;

public partial class MainWindow : Window{
 public MainWindow()
 {
 InitializeComponent();
 }

 private void ChangeTheme_Click(object sender, RoutedEventArgs e)
 {
 ThemeAnimator.ChangeTheme(this, e);
 }
}