c#多语言实现

也许你会有多语言这样的需求，后期方便添加语言，基于这样的需求写了个辅助类；

先看代码：

public class LanguageHelper
{
    private static Dictionary<string, string> m_lstLanguage = new Dictionary<string, string>();
    private static Dictionary<string, FontFamily[]> m_lstLanguageFontFamily = new Dictionary<string, FontFamily[]>();
    /// <summary>
    /// 语言改变事件委托
    /// </summary>
    /// <param name="lang">语言</param>
    public delegate void LanguageChangedHandler(string lang);
    /// <summary>
    /// 语言改变事件
    /// </summary>
    public static event LanguageChangedHandler LanguageChanged;
    /// <summary>
    /// 当前语言
    /// </summary>
    public static string Language { get; private set; }
    /// <summary>
    /// 语言文件所在文件夹
    /// </summary>
    public static string LanguageDirectory { get; private set; } = "Language";
    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="langDirectory">语言文件所在文件夹</param>
    public static void InitLanguage(string langDirectory)
    {
        LanguageDirectory = langDirectory;
    }
    /// <summary>
    /// 初始化语言对应使用的字体样式（可多次调用设置）
    /// </summary>
    /// <param name="language">语言</param>
    /// <param name="fontFamily">字体样式列表，0：常规字体，1：加粗字体（可空）</param>
    public static void InitLanguageFont(string language, FontFamily[] fontFamily)
    {
        m_lstLanguageFontFamily[language] = fontFamily;
    }
    /// <summary>
    /// 加载语言文件
    /// </summary>
    /// <param name="lang">语言文件名称，如zh-CN，UTF-8编码</param>
    /// <returns>是否加载成功</returns>
    public static bool LoadLanguage(string lang = "zh-CN")
    {
        if (File.Exists(Path.Combine(LanguageDirectory, lang + ".json")))
        {
            Language = lang;
            m_lstLanguage = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(File.ReadAllText(Path.Combine(LanguageDirectory, lang + ".json"), Encoding.UTF8));
            if (LanguageChanged != null)
            {
                LanguageChanged(lang);
            }
            return true;
        }
        return false;
    }

    /// <summary>
    /// 使用关键词获取语言文本
    /// </summary>
    /// <param name="strKey">关键词</param>
    /// <returns>文本内容</returns>
    public static string GetLanguageText(string strKey)
    {
        if (m_lstLanguage.ContainsKey(strKey))
        {
            return m_lstLanguage[strKey];
        }
        return strKey;
    }

    /// <summary>
    /// 根据语言获取对应的字体
    /// </summary>
    /// <param name="lang">语言</param>
    /// <param name="blnBold">是否粗体</param>
    /// <returns></returns>
    public static FontFamily GetFontFamilyByLanguage(string lang, bool blnBold = false)
    {
        if (m_lstLanguageFontFamily.ContainsKey(lang))
        {
            var fs = m_lstLanguageFontFamily[lang];
            if (blnBold)
            {
                if (fs.Length > 1)
                {
                    return fs[1];
                }
            }
            return fs[0];
        }
        return new FontFamily("微软雅黑");
    }
    /// <summary>
    /// 根据语言获取对应的字体，以1080为基准进行计算
    /// </summary>
    /// <param name="size"></param>
    /// <param name="lang"></param>
    /// <returns></returns>
    public static Font GetFontByLanguage(float size, string lang)
    {
        return GetFontByLanguage(size, lang, 1080);
    }
    /// <summary>
    /// 根据语言和显示宽度获取对应的字体
    /// </summary>
    /// <param name="size">原始文字大小</param>
    /// <param name="lang">语言</param>
    /// <param name="width">当前缩放后界面显示宽度，根据原始宽度来进行比例缩放</param>
    /// <param name="oldWidth">原始宽度</param>
    /// <param name="blnBold">是否加粗</param>
    /// <returns>字体</returns>
    public static Font GetFontByLanguage(float size, string lang, int width, float oldWidth = 1080.0f, bool blnBold = false)
    {
        var ff = GetFontFamilyByLanguage(lang, blnBold);
        return new Font(ff, size * width / oldWidth, blnBold ? FontStyle.Bold : FontStyle.Regular);
    }
    /// <summary>
    /// 根据字体和显示宽度获取对应的字体
    /// </summary>
    /// <param name="font">原始文字字体</param>
    /// <param name="width">当前缩放后界面显示宽度，根据原始宽度来进行比例缩放</param>
    /// <param name="oldWidth">原始宽度</param>
    /// <returns>字体</returns>
    public static Font GetFontByFont(Font font, int width, float oldWidth = 1080.0f)
    {
        return new Font(font.FontFamily, font.Size * width / oldWidth, font.Style);
    }
}

调用代码

//多语言测试
LanguageHelper.InitLanguage("Language");
//设置语言对应字体的时候，也可以使用FontHelper类加载的文件字体
LanguageHelper.InitLanguageFont("zh-CN", new System.Drawing.FontFamily[] { new System.Drawing.FontFamily("微软雅黑"), new System.Drawing.FontFamily("微软雅黑") })
LanguageHelper.InitLanguageFont("zh-TW", new System.Drawing.FontFamily[] { new System.Drawing.FontFamily("微软雅黑"), new System.Drawing.FontFamily("微软雅黑") })
LanguageHelper.LanguageChanged += (lang) =>
{
    Console.WriteLine("语言改变：" + lang);
    Console.WriteLine("-------------------");
    //重新加载语言
    Console.WriteLine(LanguageHelper.GetLanguageText("欢迎"));
    Console.WriteLine(LanguageHelper.GetLanguageText("无操作时间"));
    Console.WriteLine(LanguageHelper.GetLanguageText("等待时间"));
    Console.WriteLine(LanguageHelper.GetLanguageText("退出系统"));
    Console.WriteLine(LanguageHelper.GetLanguageText("错误提示"));
    //根据语言设置字体，一般用于语言切换，节目大小改变时，重新设置字体
    Font f1 = LanguageHelper.GetFontByLanguage(15, "zh-CN", 800, 1080, true);//原始15号字体，中文，界面宽度800，设计时原始宽度1080，是否加粗
    Console.WriteLine("缩放后字体：" + f1);
};
Console.WriteLine();
LanguageHelper.LoadLanguage("zh-CN");
Console.WriteLine();
LanguageHelper.LoadLanguage("zh-TW");
Language.LanguageHelper.LoadLanguage("zh-TW");

多语言文件格式

 语言配置文件为json格式，如zh-CN.json，UTF-8编码；
 格式为：{"key1":"value1","key2":"value2"}；

{
  "欢迎": "欢迎",
  "无操作时间": "无操作时间/秒",
  "等待时间": "等待时间/秒",
  "退出系统": "退出系统",
  "错误提示": "错误提示"
}

你可以在界面上注册事件LanguageChanged，在事件中修改界面的文字，配合GetFontByLanguage函数可以进行方便设置字体，效果更好