如何在ASP.NET Core 3.1中创建本地化路由和语言选择器？

作为一名新手，我想做三件事：

创建本地化路由，如： www.mywebsite.com/fr/controller/action/在URL中隐藏区域性如果 默认文化（英文）www.mywebsite.com/controller/action/

将用户区域性首选项保存在cookie中，以便在下次访问时自动使用

创建语言选择器

我可以让这3点分开工作，但我不能把它们全部用在一起。我真的不知道如何继续。（使用控制器或过滤器…）

对于我在下面所做的路由，除了默认语言仍然出现在url中之外，它似乎正在工作。对我来说似乎不是很干净，很确定有更好的方法来实现这一点

    public class CultureFilter : IRequestCultureProvider
{
    private readonly CultureInfo defaultCulture;
    private readonly CultureInfo defaultUICulture;

    public CultureFilter(RequestCulture requestCulture)
    {
        this.defaultCulture = requestCulture.Culture;
        this.defaultUICulture = requestCulture.UICulture;
    }

    public Task<ProviderCultureResult> DetermineProviderCultureResult(HttpContext httpContext)
    {
        //Parsing language from url path, which looks like "/en/home/index"
        PathString url = httpContext.Request.Path;

        // Test any culture in route
        if (url.ToString().Length <= 1)
        {
            // Set default Culture and default UICulture
            return Task.FromResult<ProviderCultureResult>(new ProviderCultureResult(this.defaultCulture.TwoLetterISOLanguageName, this.defaultUICulture.TwoLetterISOLanguageName));
        }

        var parts = httpContext.Request.Path.Value.Split('/');
        var culture = parts[1];

        // Test if the culture is properly formatted
        if (!Regex.IsMatch(culture, @"^[a-z]{2}(-[A-Z]{2})*$"))
        {
            // Set default Culture and default UICulture
            return Task.FromResult<ProviderCultureResult>(new ProviderCultureResult(this.defaultCulture.TwoLetterISOLanguageName, this.defaultUICulture.TwoLetterISOLanguageName));
        }

        // Set Culture and UICulture from route culture parameter
        return Task.FromResult<ProviderCultureResult>(new ProviderCultureResult(culture, culture));
    }
}

Startup.cs

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddRouting(options => options.LowercaseUrls = true);
        services.AddLocalization(options => options.ResourcesPath = "Resources");

        services
            .AddControllersWithViews()
            .AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
            .AddDataAnnotationsLocalization();

        services.Configure<RequestLocalizationOptions>(options =>
        {
            var cultures = new[]
            {
                new CultureInfo("en"),
                new CultureInfo("fr"),
                new CultureInfo("es")
            };

            options.DefaultRequestCulture = new RequestCulture(culture: "en", uiCulture: "en");
            options.SupportedCultures = cultures;
            options.SupportedUICultures = cultures;

            options.RequestCultureProviders.Insert(0, new CultureFilter(options.DefaultRequestCulture));
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseRequestLocalization();

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Static/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();
        app.UseRouting();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "localization",
                pattern: "{culture=en}/{controller=Static}/{action=Index}/{id?}");

            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Static}/{action=Index}/{id?}");
        });
    }
}

公共类启动
{
公共启动（IConfiguration配置）
{
配置=配置；
}
公共IConfiguration配置{get；}
//此方法由运行时调用。请使用此方法将服务添加到容器中。
public void配置服务（IServiceCollection服务）
{
services.AddRouting（options=>options.LowercaseUrls=true）；
services.AddLocalization（options=>options.ResourcesPath=“Resources”）；
服务
.AddControllersWithViews（）
.AddViewLocalization（LanguageViewLocationExpanderFormat.后缀）
.AddDataAnnotationsLocalization（）；
配置（选项=>
{
var cultures=new[]
{
新文化信息（“en”），
新文化资讯（“fr”），
新文化信息（“es”）
};
options.DefaultRequestCulture=新的RequestCulture（区域性：“en”，uiCulture：“en”）；
options.SupportedCultures=文化；
options.supporteducultures=文化；
Insert（0，新的CultureFilter（options.DefaultRequestCulture））；
});
}
//此方法由运行时调用。请使用此方法配置HTTP请求管道。
public void配置（IApplicationBuilder应用程序、IWebHostEnvironment环境）
{
app.UseRequestLocalization（）；
if（env.IsDevelopment（））
{
app.UseDeveloperExceptionPage（）；
}
其他的
{
app.UseExceptionHandler（“/Static/Error”）；
//默认的HSTS值为30天。您可能希望在生产场景中更改此值，请参阅https://aka.ms/aspnetcore-hsts.
app.UseHsts（）；
}
app.UseHttpsRedirection（）；
app.UseStaticFiles（）；
app.UseRouting（）；
app.UseAuthorization（）；
app.UseEndpoints（端点=>
{
endpoints.MapControllerRoute(
名称：“本地化”，
模式：“{culture=en}/{controller=Static}/{action=Index}/{id？}”）；
endpoints.MapControllerRoute(
名称：“默认”，
模式：“{controller=Static}/{action=Index}/{id？}”）；
});
}
}

---

感谢您的帮助。

在ASP.NET Core中有一个可用于处理本地化的扩展：

Microsoft.Extensions.localization

：在ASP.NET Core中有一个可用于处理本地化的扩展：

Microsoft.Extensions.localization

：

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddRouting(options => options.LowercaseUrls = true);
        services.AddLocalization(options => options.ResourcesPath = "Resources");

        services
            .AddControllersWithViews()
            .AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
            .AddDataAnnotationsLocalization();

        services.Configure<RequestLocalizationOptions>(options =>
        {
            var cultures = new[]
            {
                new CultureInfo("en"),
                new CultureInfo("fr"),
                new CultureInfo("es")
            };

            options.DefaultRequestCulture = new RequestCulture(culture: "en", uiCulture: "en");
            options.SupportedCultures = cultures;
            options.SupportedUICultures = cultures;

            options.RequestCultureProviders.Insert(0, new CultureFilter(options.DefaultRequestCulture));
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseRequestLocalization();

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Static/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();
        app.UseRouting();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "localization",
                pattern: "{culture=en}/{controller=Static}/{action=Index}/{id?}");

            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Static}/{action=Index}/{id?}");
        });
    }
}