WPF语言切换，国际化

winform语言切换在每个窗口下面有一个.resx结尾的资源文件，在上面添加新字符串就好了；

WPF语言切换跟winform不一样的地方在于需要自己添加资源文件，并且这个资源文件可以写一个，也可以写多个。

// 英文资源文件：enus.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 ="label_text_1">Click the button to change language.</sys:String>

    <sys:String x:Key="button_text_1">Change</sys:String>

    <sys:String x:Key ="label_text_2">Click the button to change language.</sys:String>

    <sys:String x:Key="button_text_2">Change2222</sys:String>

</ResourceDictionary>

// 中文资源文件：zhcn.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="label_text_1">点击按钮更换语言</sys:String>

    <sys:String x:Key="button_text_1">更换</sys:String>

    <sys:String x:Key ="label_text_2">点击按钮更换语言.</sys:String>

    <sys:String x:Key="button_text_2">更换2222</sys:String>

</ResourceDictionary>

// 项目默认资源添加：App.xaml

    <Application.Resources>

        <ResourceDictionary>

            <ResourceDictionary.MergedDictionaries>

                <!--绝对地址，不容易报错-->

                <!--<ResourceDictionary Source="pack://application:,,,/{工程名字};component{资源文件地址}"/>-->

                <ResourceDictionary Source="pack://application:,,,/ChangeLanguages;component/Languages/zhcn.xaml"/>

                <!--普通引用，跨工程容易找不到-->

                <!--<ResourceDictionary Source="Languages/enus.xaml"/>-->

            </ResourceDictionary.MergedDictionaries>

        </ResourceDictionary>

    </Application.Resources>

// 前台绑定使用

        <Label Height="" Content="{DynamicResource label_text_1}" VerticalAlignment="Top" x:Name="lable"/>

        <Button Name="btnChange" Content="{DynamicResource button_text_1}" Height="" Width="" Click="btnChange_Click" />

        <Button Name="btn_1" Click="btn_1_Click" Height="" Width="" Content="{Binding ElementName=root,Path=ContentTypeProperty}"/>

// 后台绑定方法1,添加到当前页的资源字典，适合资源文件分开的情况同winform

string windowCurrentLanguageFile = "Languages\\enus.xaml";

        private void setLanguage()

        {

            windowCurrentLanguageFile = windowCurrentLanguageFile == "Languages\\enus.xaml"

                ? "Languages\\zhcn.xaml"

                : "Languages\\enus.xaml";

            var rd = new ResourceDictionary() { Source = new Uri(windowCurrentLanguageFile, UriKind.RelativeOrAbsolute) };

            if (this.Resources.MergedDictionaries.Count == )

                this.Resources.MergedDictionaries.Add(rd);

            else

                this.Resources.MergedDictionaries[] = rd;

        }

//  后台绑定方法2，添加到App.xaml中指定的资源，demo中就是0，App.xaml中字典中默认的条数是多少，从0开始

string windowCurrentLanguageFile = "Languages\\enus.xaml";

        private void setLanguage()

        {

            windowCurrentLanguageFile = windowCurrentLanguageFile == "Languages\\enus.xaml"

                  ? "Languages\\zhcn.xaml"

                  : "Languages\\enus.xaml";

            Application.Current.Resources.MergedDictionaries[] = new ResourceDictionary() { Source = new Uri(windowCurrentLanguageFile, UriKind.RelativeOrAbsolute) };

//windowCurrentLanguageFile = windowCurrentLanguageFile == "enus.xaml"
              // ? "zhcn.xaml"
              // : "enus.xaml";
              //Application.Current.Resources.MergedDictionaries[0] = new ResourceDictionary() { Source = new Uri(string.Format("pack://application:,,,/ChangeLanguages;component/Languages/{0}", windowCurrentLanguageFile), UriKind.Absolute) };

        }

// 后台绑定方法3，添加到App.xaml中指定的资源，通过查找来进行替换，防止报索引的错，该查找方法只支持绝对地址，2,3方法方便全局设置，即设置一次全局改变

string windowCurrentLanguageFile = "enus.xaml";

        private void setLanguage()

        {

            windowCurrentLanguageFile = windowCurrentLanguageFile == "enus.xaml"

                  ? "zhcn.xaml"

                  : "enus.xaml";

            Application.Current.Resources.MergedDictionaries.FirstOrDefault(s => s.Source.AbsoluteUri.Contains("Languages")).Source = new Uri(string.Format("pack://application:,,,/ChangeLanguages;component/Languages/{0}", windowCurrentLanguageFile), UriKind.Absolute);

        }

示例代码