WPF实现多语言切换

WPF实现多语言切换完整指南

一、基础实现方案

1. 资源文件准备

首先创建不同语言的资源文件：

Resources/
├── Strings.resx          // 默认语言(英语)
├── Strings.zh-CN.resx    // 简体中文
└── Strings.ja-JP.resx    // 日语

​​Strings.resx​​ (默认英语):

<data name="WelcomeMessage" xml:space="preserve">
  <value>Welcome to our application!</value>
</data>
<data name="Exit" xml:space="preserve">
  <value>Exit</value>
</data>

​​Strings.zh-CN.resx​​ (简体中文):

<data name="WelcomeMessage" xml:space="preserve">
  <value>欢迎使用我们的应用程序！</value>
</data>
<data name="Exit" xml:space="preserve">
  <value>退出</value>
</data>

2. 创建资源管理类

// LocalizationManager.cs
using System.Globalization;
using System.Threading;
using System.Windows;

public class LocalizationManager
{
    private static readonly CultureInfo _defaultCulture = new CultureInfo("en-US");
    
    public static void Initialize()
    {
        // 设置默认语言
        SetLanguage(_defaultCulture);
    }
    
    public static void SetLanguage(CultureInfo culture)
    {
        if (culture == null)
            throw new ArgumentNullException(nameof(culture));
            
        Thread.CurrentThread.CurrentUICulture = culture;
        Thread.CurrentThread.CurrentCulture = culture;
        
        // 更新所有已加载的资源字典
        var mergedDictionaries = Application.Current.Resources.MergedDictionaries;
        var resourceDict = mergedDictionaries.FirstOrDefault(d => d.Source != null && 
            d.Source.OriginalString.Contains("Resources/Strings."));
            
        if (resourceDict != null)
        {
            mergedDictionaries.Remove(resourceDict);
        }
        
        // 添加新的语言资源
        var newResourceDict = new ResourceDictionary
        {
            Source = new Uri($"/YourAssemblyName;component/Resources/Strings.{culture.Name}.xaml", 
                            UriKind.Relative)
        };
        
        mergedDictionaries.Insert(0, newResourceDict);
        
        // 更新界面
        foreach (Window window in Application.Current.Windows)
        {
            var context = window.DataContext as INotifyPropertyChanged;
            if (context != null)
            {
                context.OnPropertyChanged(string.Empty); // 触发所有绑定重新评估
            }
        }
    }
    
    public s