.Net Core 多语言

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllerRoute(
            name: "default",
            pattern: "{controller=Home}/{action=Index}/{id?}");
        endpoints.MapControllerRoute(
                name: "Localization",
                pattern: "{lang=cn}/{controller=Home}/{action=Index}/{id?}");
    });
}

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    string defaultLang = "cn";
    string cookieKey = "VipSoft.CurrentUICulture";
    var lang = filterContext.RouteData.Values["lang"];
    if (lang == null || string.IsNullOrWhiteSpace(lang.ToString()))
    {
        //如果URL中没有语言 看 Cookie 中有没有，都没有默认 en
        var cookie = filterContext.HttpContext.Request.Cookies[cookieKey];
        if (cookie == null)
        {
            lang = defaultLang;
        }
        else
        {
            lang = cookie;
        }
        ///把语言值设置到路由值里
        filterContext.RouteData.Values["lang"] = lang;
    }
    try
    {
        Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang.ToString());
    }
    catch (Exception e)
    {
        Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(defaultLang);
    }
    CacheCenter.CurrentLang = Thread.CurrentThread.CurrentUICulture.Name == "en-US" ? "en" : defaultLang;
    /// 把设置保存进cookie
    CookieOptions cookieOptions = new CookieOptions();
    cookieOptions.Expires = DateTime.Now.AddYears(1);
    filterContext.HttpContext.Response.Cookies.Append(cookieKey, Thread.CurrentThread.CurrentUICulture.Name, cookieOptions);
    base.OnActionExecuting(filterContext);
}