C# .NET MVC Core 3.1本地化和#x27；我不能接受当前的文化

我正在将.NET4.7应用程序转换为.NETCore3.1。我正在更新本地化部分。我举了一些例子，比如

它工作得很好，但我没有找到一种方法使UrlHelper.Action在没有精确文化的情况下工作。 我想自动设置区域性参数。它应该来自userclaims、以前的请求区域性或默认区域性

例如，如果URL为“/Home/Contact”，则生成链接的UrlHelper或HtmlHelper将为/Home/About。 如果当前URL为“/en/Home/Contact”，则链接将生成为“/en/Home/About”。 如果用户经过身份验证，则应为“/userCulture/Home/About”

但是我不能强制我的路由模板仅为“{culture=en}/{controller=Home}/{action=Welcome}/{id？}”，因为根url必须是可访问的，并且API url应该保持lile“API/SomeStuff”

Startup.cs：

var supportedCultures = CultureHelper.Cultures.Select(a => new CultureInfo(a)).ToArray();
var requestLocalizationOptions = new RequestLocalizationOptions();
requestLocalizationOptions.SupportedCultures = supportedCultures;
services.AddLocalization();
services.Configure<RequestLocalizationOptions>(options =>
{
    options.DefaultRequestCulture = new RequestCulture("fr", "fr");
    options.SupportedCultures = supportedCultures;
    options.SupportedUICultures = supportedCultures;
    options.RequestCultureProviders.Insert(0, new RouteValueRequestCultureProvider() { Options = requestLocalizationOptions });
});

//......................................

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

---

如果缺少区域性，是否有方法使Urlhelper从当前上下文添加该区域性？

由于您在.NET Core中，因此应使用替换

Url.Action

方法

通过使用标记帮助器，您可以使用以下内容：

<a asp-controller="MyController" asp-action="DisplayItem" asp-route-number="123">Click</a>

修改

Shared/_ViewImports.cshtml

以删除当前的

AnchorTagHelper

，并使用新创建的标记帮助程序，如下所示：

应用所有更改后的标记后，使用标记辅助对象时将填充区域性

---

Url.Action根据路由模板生成Url。通用模板是将区域性放在根路径（/controller/culture/）之后。我会将您的答案标记为正确答案。但我还是很失望。我必须重写我的应用程序的上千个链接中的每一个。。。。

Url.Action("DisplayItem", "MyController",new { culture = ViewBag.Culture as string, number = 123, permalink = "permalink1235" }) 
// => /en/items/123/permalink1235 OK

Url.Action("DisplayItem", "MyController",new { number = 123, permalink = "permalink1235"  }) 
// => /en/MyController/DisplayItem?number=123&permalink=permalink1235 KO

<a asp-controller="MyController" asp-action="DisplayItem" asp-route-number="123">Click</a>

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.TagHelpers;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;

namespace YourMvcName.TagHelpers
{
    [HtmlTargetElement("a", Attributes = ActionAttributeName)]
    [HtmlTargetElement("a", Attributes = ControllerAttributeName)]
    [HtmlTargetElement("a", Attributes = AreaAttributeName)]
    [HtmlTargetElement("a", Attributes = PageAttributeName)]
    [HtmlTargetElement("a", Attributes = PageHandlerAttributeName)]
    [HtmlTargetElement("a", Attributes = FragmentAttributeName)]
    [HtmlTargetElement("a", Attributes = HostAttributeName)]
    [HtmlTargetElement("a", Attributes = ProtocolAttributeName)]
    [HtmlTargetElement("a", Attributes = RouteAttributeName)]
    [HtmlTargetElement("a", Attributes = RouteValuesDictionaryName)]
    [HtmlTargetElement("a", Attributes = RouteValuesPrefix + "*")]
    public class CultureAnchorTagHelper : AnchorTagHelper
    {
        public CultureAnchorTagHelper(IHttpContextAccessor contextAccessor, IHtmlGenerator generator) :
            base(generator)
        {
            this.contextAccessor = contextAccessor;
        }

        private const string ActionAttributeName = "asp-action";
        private const string ControllerAttributeName = "asp-controller";
        private const string AreaAttributeName = "asp-area";
        private const string PageAttributeName = "asp-page";
        private const string PageHandlerAttributeName = "asp-page-handler";
        private const string FragmentAttributeName = "asp-fragment";
        private const string HostAttributeName = "asp-host";
        private const string ProtocolAttributeName = "asp-protocol";
        private const string RouteAttributeName = "asp-route";
        private const string RouteValuesDictionaryName = "asp-all-route-data";
        private const string RouteValuesPrefix = "asp-route-";
        private const string Href = "href";

        private readonly IHttpContextAccessor contextAccessor;
        private readonly string defaultRequestCulture = "en";

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            // Get the culture from the route values
            var culture = (string)contextAccessor.HttpContext.Request.RouteValues["culture"];
 
            // Set the culture in the route values if it is not null
            if (culture != null && culture != defaultRequestCulture)
            {
                // Remove the 'href' just in case
                output.Attributes.RemoveAll("href");
                RouteValues["culture"] = culture;
            }
           
            // Call the base class for all other functionality, we've only added the culture route value.
            // Because the route has the `{culture=en}`, the tag helper knows what to do with that route value.
            base.Process(context, output);
        }
    }
}

@removeTagHelper Microsoft.AspNetCore.Mvc.TagHelpers.AnchorTagHelper, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, YourMvcName