WPF应用程序(.Net Framework 4.8) 国际化

1、新建两个资源字典文件zh-CN.xaml和en-US.xaml，分别存储中文模板和英文模板

(1) zh-CN.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:sys="clr-namespace:System;assembly=mscorlib">
    <sys:String x:Key="labelLanguage">语言:</sys:String>
    <sys:String x:Key="comboEnglish">英语</sys:String>
    <sys:String x:Key="comboChinese">中文</sys:String>
    <sys:String x:Key="BtnContent">确定</sys:String>
    <sys:String x:Key="textboxContent">这是语言切换测试文本内容</sys:String>
</ResourceDictionary>

(2) en-US.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:sys="clr-namespace:System;assembly=mscorlib">
    <sys:String x:Key="labelLanguage">Language:</sys:String>
    <sys:String x:Key="comboEnglish">English</sys:String>
    <sys:String x:Key="comboChinese">Chinese</sys:String>
    <sys:String x:Key="BtnContent">OK</sys:String>
    <sys:String x:Key="textboxContent">This is the language switching test text content.</sys:String>
</ResourceDictionary>

2、在App.xaml文件内，引入默认使用的语言对应的资源字典，在此默认语言为中文

<Application x:Class="LanguageChangeDemo.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:LanguageChangeDemo"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="zh-CN.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

3、在MainWindow.xaml中添加中英文单选按钮和切换按钮，以及测试文本；并使用`{DynamicResource x:Key}`动态引用资源字典

<Window x:Class="LanguageChangeDemo.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:LanguageChangeDemo"
        mc:Ignorable="d"
        Title="{DynamicResource International}" Height="250" Width="395" WindowStartupLocation="CenterScreen">
    <Grid>
        <Label Content="{DynamicResource labelLanguage}"  HorizontalAlignment="Left" Margin="34,54,0,0" VerticalAlignment="Top" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
        <RadioButton x:Name="cn" Content="{DynamicResource comboChinese}" GroupName="LanguangeChoice" HorizontalAlignment="Left" Margin="106,60,0,0" VerticalAlignment="Top" HorizontalContentAlignment="Left" VerticalContentAlignment="Center" Checked="RadioButton_Checked" IsChecked="True"/>
        <RadioButton x:Name="en" Content="{DynamicResource comboEnglish}" GroupName="LanguangeChoice" HorizontalAlignment="Left" Margin="198,60,0,0" VerticalAlignment="Top" HorizontalContentAlignment="Left" VerticalContentAlignment="Center" Checked="RadioButton_Checked"/>
        <Button Visibility="Hidden" Content="{DynamicResource BtnContent}" HorizontalAlignment="Left" Margin="274,54,0,0" VerticalAlignment="Top" Height="25" Width="60" Click="Button_Click"/>
        <TextBox Text="{DynamicResource textboxContent}" HorizontalAlignment="Center" Margin="0,132,0,0" TextWrapping="Wrap" VerticalAlignment="Top" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Width="395" BorderThickness="0"/>
    </Grid>
</Window>

4、MainWindow.xaml.cs中添加切换逻辑

namespace LanguageChangeDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        string selectItem = "";
        string languageType = "";

        public MainWindow()
        {
            InitializeComponent();
        }


        private void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
            RadioButton radioButton = sender as RadioButton;
            if (radioButton.IsChecked == true)
            {
                selectItem = radioButton.Content.ToString();
                switch (selectItem)
                {
                    case "中文":
                        languageType = "zh-CN";
                        Change();
                        break;
                    case "英语":
                        languageType = "en-US";
                        Change();
                        break;
                    case "Chinese":
                        languageType = "zh-CN";
                        Change();
                        break;
                    case "English":
                        languageType = "en-US";
                        Change();
                        break;
                    default:
                        break;
                }
            }
        }





        private void Button_Click(object sender, RoutedEventArgs e)
        {
            改版前
            //if (languageType != null)
            //{
            //    ResourceDictionary langRd = null;
            //    try
            //    {
            //        //根据名字载入语言文件
            //        langRd = Application.LoadComponent(new Uri(languageType + ".xaml", UriKind.Relative)) as ResourceDictionary;
            //    }
            //    catch (Exception e2)
            //    {
            //        MessageBox.Show(e2.Message);
            //    }

            //    if (langRd != null)
            //    {
            //        //如果已使用其他语言,先清空
            //        if (this.Resources.MergedDictionaries.Count > 0)
            //        {
            //            this.Resources.MergedDictionaries.Clear();
            //        }
            //        this.Resources.MergedDictionaries.Add(langRd);
            //    }
            //}
        }

        public void Change()
        {
            if (languageType != null)
            {
                ResourceDictionary langRd = null;
                try
                {
                    //根据名字载入语言文件
                    langRd = Application.LoadComponent(new Uri(languageType + ".xaml", UriKind.Relative)) as ResourceDictionary;
                }
                catch (Exception e2)
                {
                    MessageBox.Show(e2.Message);
                }

                if (langRd != null)
                {
                    //如果已使用其他语言,先清空
                    if (this.Resources.MergedDictionaries.Count > 0)
                    {
                        this.Resources.MergedDictionaries.Clear();
                    }
                    this.Resources.MergedDictionaries.Add(langRd);
                }
            }
        }
    }
}

5、效果