WPF程序实现多语言支持 动态加载资源词典

1. 创建资源词典，首先新建两个词典文件en-us.xaml、zh-cn.xaml

   zh-cn.xaml：

   <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                       xmlns:local="clr-namespace:GPIO_TOOL_WIN"
                       xmlns:s="clr-namespace:System;assembly=mscorlib">
       <s:String x:Key="buttonTest1">测试按钮1</s:String>
       <s:String x:Key="buttonTest2">测试按钮2</s:String>
       <s:String x:Key="buttoncn">中文</s:String>
       <s:String x:Key="buttonen">英文</s:String>
   </ResourceDictionary>

   en-us.xaml:

   <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                       xmlns:local="clr-namespace:TEST_TOOL_WIN"
                       xmlns:s="clr-namespace:System;assembly=mscorlib">
       <s:String x:Key="buttonTest1">Button TEST1</s:String>
       <s:String x:Key="buttonTest2">Button TEST2</s:String>
       <s:String x:Key="buttoncn">Chinese</s:String>
       <s:String x:Key="buttonen">English</s:String>
   </ResourceDictionary>

2. 将两个资源词典添加到App.xaml中

   <Application x:Class="GPIO_TOOL_WIN.App"
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:TEST_TOOL_WIN"
                StartupUri="MainWindow.xaml">
       <Application.Resources>
           <ResourceDictionary>
               <ResourceDictionary.MergedDictionaries>
                   <ResourceDictionary Source="Resources\en-us.xaml" />
                   <ResourceDictionary Source="Resources\zh-cn.xaml" />
               </ResourceDictionary.MergedDictionaries>
           </ResourceDictionary>
       </Application.Resources>
   </Application>

3. 在界面设计器中需要显示的位置添加动态资源，例如：

   <Window x:Class="GPIO_TOOL_WIN.MainWindow"
           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"
           xmlns:local="clr-namespace:TEST_TOOL_WIN"
           mc:Ignorable="d"
           Title="WPF TEST" Height="450" Width="800">
       <Grid>
           <Button x:Name="buttonTest1" Content="{DynamicResource buttonTest1}" HorizontalAlignment="Left" Margin="20,20,0,0" VerticalAlignment="Top" Width="100"/>
           <Button x:Name="buttonTest2" Content="{DynamicResource buttonTest2}" HorizontalAlignment="Left" Margin="20,50,0,0" VerticalAlignment="Top" Width="100"/>
           <Button x:Name="buttoncn" Content="{DynamicResource buttoncn}" HorizontalAlignment="Left" Margin="20,150,0,0" VerticalAlignment="Top" Width="75" Click="Buttoncn_Click"/>
           <Button x:Name="buttonen" Content="{DynamicResource buttonen}" HorizontalAlignment="Left" Margin="120,150,0,0" VerticalAlignment="Top" Width="75" Click="Buttonen_Click"/>
       </Grid>
   </Window>

4. 切换语言代码如下：

   List<ResourceDictionary> dictionaryList = new List<ResourceDictionary>();
               foreach (ResourceDictionary dictionary in Application.Current.Resources.MergedDictionaries)
               {
                   dictionaryList.Add(dictionary);
               }
               string requestedCulture = @"Resources\en-us.xaml";
               ResourceDictionary resourceDictionary = dictionaryList.Find(d => d.Source.OriginalString.Equals(requestedCulture));
               Application.Current.Resources.MergedDictionaries.Remove(resourceDictionary);
               Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);

5. 测试效果如下图：