【WPF】通过动态/静态资源实现语言切换

一、动态切换

1、根据需要创建语言资源(en-US和zh-CN),导入命名空间

xmlns:sys="clr-namespace:System;assembly=mscorlib

<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="txtLanguage">Language</sys:String>
    <sys:String x:Key="txtStandard">RF Standard</sys:String>
    <sys:String x:Key="txtBandWidth">BandWidth</sys:String>
    <sys:String x:Key="txtCenterFreq">CenterFreq</sys:String>
    <sys:String x:Key="contChinese">Chinese</sys:String>
    <sys:String x:Key="contEnglish">English</sys:String>
</ResourceDictionary>

<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="txtLanguage">语言</sys:String>
    <sys:String x:Key="txtStandard">射频标准</sys:String>
    <sys:String x:Key="txtBandWidth">带宽</sys:String>
    <sys:String x:Key="txtCenterFreq">中心频点</sys:String>
    <sys:String x:Key="contChinese">中文</sys:String>
    <sys:String x:Key="contEnglish">英文</sys:String>
</ResourceDictionary>

2、在前端引用

 <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <TextBlock Grid.Row="0" Grid.Column="0" Text="{DynamicResource txtLanguage}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"></TextBlock>
        <TextBlock Grid.Row="1" Grid.Column="0" Text="{DynamicResource txtStandard}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        <TextBlock Grid.Row="2" Grid.Column="0" Text="{DynamicResource txtBandWidth}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        <TextBlock Grid.Row="3" Grid.Column="0" Text="{DynamicResource txtCenterFreq}" FontSize="30" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        <ComboBox Grid.Row="0" Grid.Column="1" Name="languageCombobox" FontSize="20" Height="50" Width="200" Margin="0 0 0 10" SelectionChanged="languageCombobox_SelectionChanged">
            <ComboBoxItem Content="{DynamicResource contChinese}"/>
            <ComboBoxItem Content="{DynamicResource contEnglish}"/>
        </ComboBox>
        <ComboBox Grid.Row="1" Grid.Column="1" Name="standardCombobox" FontSize="20" Height="50" Width="200" Margin="0 0 0 10" SelectionChanged="standardCombobox_SelectionChanged"/>
        <ComboBox Grid.Row="2" Grid.Column="1" Name="bandWidthCombobox" FontSize="20" Height="50" Width="200" Margin="0 0 0 10"/>
        <ComboBox Grid.Row="3" Grid.Column="1" Name="centerFreCombobox" FontSize="20" Height="50" Width="200" Margin="0 0 0 10"/>
    </Grid>

3、语言切换,key值一样,前端会应用最新添加的资源

     private void languageCombobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (!(sender is ComboBox combobox)) return;
            
            var languageType = "";
            var selectItem = (combobox.SelectedItem as ComboBoxItem).Content;          

            switch (selectItem)
            {
                case "中文":
                    languageType = "zh-CN";
                    break;
                case "英文":
                    languageType = "en-US";                 
                    break;
                case "Chinese":
                    languageType = "zh-CN";                 
                    break;
                case "English":
                    languageType = "en-US";
                    break;
                default:
                    break;
            }
            
            //更换资源文件
            List<ResourceDictionary> dictionaryList = new List<ResourceDictionary>();
            foreach (ResourceDictionary dictionary in Application.Current.Resources.MergedDictionaries)
            {
                 dictionaryList.Add(dictionary);
            }
            string requestedCulture = string.Format(@"Resource\{0}.xaml", languageType);
            ResourceDictionary resourceDictionary = dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture));
            if (resourceDictionary == null)
            {
                requestedCulture = @"Resource\zh-CN.xaml";
                resourceDictionary = dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture));
            }
             if (resourceDictionary != null)
             {
                 Application.Current.Resources.MergedDictionaries.Remove(resourceDictionary);
                 Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);
             }
             
        }

二、静态切换

 1. 在Properties下的Resources.rexs里添加key,value,访问修饰符改为public

2.再添加一个rexs文件,添加完再重命名(添加时重命名可能会缺少文件,切换失败),同样添加key,value,修改访问修饰符3.

 3.Setting里新建一条记录,给一个默认值

 4.应用

 前端应用的话需要引入properties的命名空间,然后赋值,例如 Text/Content={x:static res:Resources.Language },不晓得是什么原因,我前段找不到资源,就在后端赋值了

    <Grid>
        <TextBlock Name="texLanguage" Height="50" Width="100" FontSize="20" HorizontalAlignment="Left" Margin="30 0 0 0"/>
        <ComboBox Name="languageCbb" Height="50" Width="100" FontSize="20" HorizontalAlignment="Left" Margin="200 0 0 0" SelectionChanged="ComboBox_SelectionChanged">
            <ComboBoxItem Name="chineseItem"/>
            <ComboBoxItem Name="englishItem"/>
        </ComboBox>
    </Grid>

languageCbb.SelectedIndex = Thread.CurrentThread.CurrentUICulture.Name == "zh-CN" ? 0 : 1;

texLanguage.Text = Properties.Resources.Language;
chineseItem.Content = Properties.Resources.Chinese;
englishItem.Content = Properties.Resources.English;

5.启动时应用语言设置,并获取对应的资源配置

    public partial class App : Application
    {
        private ResourceManager currentResource;
        public App()
        {
            var cultureName = Settings.Default.CultureName;
            if (!string.IsNullOrEmpty(cultureName))
            {
                try
                {
                    CultureInfo cultureInfo = new CultureInfo(cultureName);
                    CultureInfo.DefaultThreadCurrentCulture = cultureInfo;
                    CultureInfo.DefaultThreadCurrentUICulture = cultureInfo;
                }
                catch (CultureNotFoundException ex)
                {
                    MessageBox.Show(ex.Message);
                }

                Settings.Default.CultureName = Thread.CurrentThread.CurrentUICulture.Name;
                Settings.Default.Save();

                //获得当前的Resource配置
                currentResource = new ResourceManager("Language.Properties.Resources", typeof(Properties.Resources).Assembly);
            }
        }
    }

6.切换语言时修改配置并重启

        private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (!(sender is ComboBox combobox)) return;
            if(e.RemovedItems.Count != 0)
            {
                Properties.Settings.Default.CultureName = Thread.CurrentThread.CurrentUICulture.Name == "zh-CN" ? "en-US" : "zh-CN";
                Properties.Settings.Default.Save();

                Task.Delay(500);

                Process.Start(Application.ResourceAssembly.Location);
                Application.Current.Shutdown();                
            }
        }