WPF实现无刷新动态切换多语言(国际化)

1. 在WPF中国际化使用的是 .xaml文件的格式

如图：Resource Dictionary (WPF)

2. 创建默认的语言文件和其他语言文件

这里以英语为默认语言，新建一个 Resource Dictionary (WPF)文件，并命名为DefaultLanguage.xaml,内容如下：

<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"><!--这行新增加的-->
    <sys:String x:Key="OK">
        OK
    </sys:String>
    <sys:String x:Key="Cancel">
        Cancel
    </sys:String>
</ResourceDictionary>

　　默认语言文件的 BuildAction要设置为 Page，如图：

为了便于管理，一般将所有的语言文件都放在一个目录下，这里创建lang目录，

然后在创建另一个语言文件，这里是中文，命名为 zh_CN.xaml，内容如下：

<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="OK">
        确定
    </sys:String>

    <sys:String x:Key="Cancel">
        取消
    </sys:String>
</ResourceDictionary>

其他非默认语言的设置应该如下：

BuildAction设置为：Content ；CopyToOutputDirectory设置为：Copy if newer (先这样做吧，原因未清)

3.在App.xaml中配置默认语言：

<Application x:Class="LanTest.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary><!--这个节点就是配置默认语言的-->
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="langDefaultLanguage.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

4.实际使用(敲代码了)　

4.1. 界面效果如下：

4.2. 界面的.xaml代码

 1 <Window x:Class="LanTest.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         Title="MainWindow" Height="350" Width="525">
 5     <Grid>
 6         <!--这里的{DynamicResource OK}就是动态调用 资源中的key为OK的内容-->
 7         <Button Content="{DynamicResource OK}" HorizontalAlignment="Left" Margin="134,161,0,0" VerticalAlignment="Top" Width="104" Height="38"/>
 8         <Button Content="{DynamicResource Cancel}" HorizontalAlignment="Left" Margin="278,161,0,0" VerticalAlignment="Top" Width="100" Height="38"/>
 9         <Button Content="Button" HorizontalAlignment="Left" Margin="287,59,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click" Loaded="Button_Loaded"/>
10         <ComboBox Name="cbLang" HorizontalAlignment="Left" Margin="118,59,0,0" VerticalAlignment="Top" Width="120">
11         </ComboBox>
12 
13     </Grid>
14 </Window>

View Code

4.3. 后台逻辑代码：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Globalization;
 4 using System.Linq;
 5 using System.Text;
 6 using System.Threading.Tasks;
 7 using System.Windows;
 8 using System.Windows.Controls;
 9 using System.Windows.Data;
10 using System.Windows.Documents;
11 using System.Windows.Input;
12 using System.Windows.Media;
13 using System.Windows.Media.Imaging;
14 using System.Windows.Navigation;
15 using System.Windows.Shapes;
16 
17 namespace LanTest
18 {
19     /// <summary>
20     /// Interaction logic for MainWindow.xaml
21     /// </summary>
22     public partial class MainWindow : Window
23     {
24         public MainWindow()
25         {
26             InitializeComponent();
27         }
28 
29         //定义ComboBox选项的类，存放Name和Value
30         public class CategoryInfo
31         {
32             public string Name
33             {
34                 get;
35                 set;
36             }
37             public string Value
38             {
39                 get;
40                 set;
41             }
42 
43         }
44 
45         //切换语言
46         private void btnChangeLang_Click(object sender, RoutedEventArgs e)
47         {
48             object selectedName = cbLang.SelectedValue;
49             if (selectedName != null)
50             {
51                 string langName = selectedName.ToString();
52                 //英语的语言文件名为:DefaultLanguage,所有这里要转换一下
53                 if (langName == "en_US")
54                     langName = "DefaultLanguage";
55                 //根据本地语言来进行本地化,不过这里上不到
56                 //CultureInfo currentCultureInfo = CultureInfo.CurrentCulture;
57 
58                 ResourceDictionary langRd = null;
59                 try
60                 {
61                     //根据名字载入语言文件
62                     langRd = Application.LoadComponent(new Uri(@"lang" + langName + ".xaml", UriKind.Relative)) as ResourceDictionary;
63                 }
64                 catch(Exception e2)
65                 {
66                     MessageBox.Show(e2.Message);
67                 }
68 
69                 if (langRd != null)
70                 {
71                     //如果已使用其他语言,先清空
72                     if (this.Resources.MergedDictionaries.Count > 0)
73                     {
74                         this.Resources.MergedDictionaries.Clear();
75                     }
76                     this.Resources.MergedDictionaries.Add(langRd);
77                 }
78             }
79             else
80                 MessageBox.Show("Please selected one Language first.");
81         }
82 
83         //控件载入时，为ComboBox赋值
84         private void cbLang_Loaded(object sender, RoutedEventArgs e)
85         {
86             List<CategoryInfo> categoryList = new List<CategoryInfo>();
87             categoryList.Add(new CategoryInfo() { Name = "English", Value = "en_US" });
88             categoryList.Add(new CategoryInfo() { Name = "中文", Value = "zh_CN" });
89             
90             cbLang.ItemsSource = categoryList;//绑定数据，真正的赋值
91             cbLang.DisplayMemberPath = "Name";//指定显示的内容
92             cbLang.SelectedValuePath = "Value";//指定选中后的能够获取到的内容
93         }
94     }
95 }

View Code