这是一个适合我的解决方法：
// 如果路由匹配这个模式，假设：
app.UseMvc(routeBuilder => {
routeBuilder.MapRoute("route1",template: "/{controller=Home}/{action=Index}");
});
// 否则如果路由匹配 `{culture=en-US}/{controller=Home}/{action=Index}`
app.UseRouter(routeBuilder =>{
var template = "{culture=en-US}/{controller=Home}/{action=Index}";
routeBuilder.MapMiddlewareRoute(template, appBuilder =>{
appBuilder.Use(async(context, next)=>{
var routeData = context.GetRouteData();
var controller = routeData.Values["controller"] as string;
var action= routeData.Values["action"] 作为字符串；
varculture=routeData.Values["culture"] 作为字符串；
// 根据当前路由数据获取真正的后备路径
context.Request.Path = getNormalizedPath(routeData);
等待下一个（）；
});
appBuilder.UseRequestLocalization();
appBuilder.UseMvc(rb=>{
rb.MapRoute(name:"cultureRoute",template:template);
});
});
//如果你有其他的MVC路由，在下面添加：
// routeBuilder.MapRoute(name:"mvcRoutes",template: "{area:exists}/{controller=Home}/{action=Index}");
});
// else if 不匹配上面的模式，比方说：
app.UseMvc(routeBuilder => {
routeBuilder.MapRoute("route3",template: "/test/mvc/{controller=Home}/{action=Index}");
});
private string getNormalizedPath(RouteData routeData)
{
var culture= routeData.Values["culture"] as string;
var controller = routeData.Values["controller"] as string;
var action= routeData.Values["action"] as string;
controller = ... real controller according to current culture & controller string
action = ... real action according to current culture & controller string
return $"/{culture}/{controller}/{action}";
}
您需要自定义getNormalizedPath(routeData) 以获得将被路由到支持控制器/动作的真实路径。
要同时根据当前路由路径自动设置请求本地化功能，您需要插入RouteDataRequestCultureProvider：
services.Configure<RequestLocalizationOptions>(options =>
{
var supportedCultures = new[]{
new CultureInfo("en"),
new CultureInfo("fr"),
new CultureInfo("de"),
new CultureInfo("it"),
};
options.SupportedCultures = supportedCultures;
options.SupportedUICultures = supportedCultures;
options.RequestCultureProviders.Insert(0, new RouteDataRequestCultureProvider());
});
@ʞᴉɯ 在 cmets 中发现，第一个 UseMvc() 不适用于 2.2。我们需要将 MVC Compatibility 更改为 CompatibilityVersion.Version_2_1:
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);