asp.net-mvc – Asp.Net自定义路由和自定义路由并在控制器之前添

是的,这是可能的.首先,您必须创建RouteConstraint以确保已选择品牌.如果尚未选择品牌,则此路线应该失败,并且应该跟随到重定向到品牌选择器的操作的路线. RouteConstraint应如下所示：

using System; 
using System.Web;  
using System.Web.Routing;  
namespace Examples.Extensions 
{ 
    public class MustBeBrand : IRouteConstraint 
    { 
        public bool Match(HttpContextBase httpContext,Route route,string parameterName,RouteValueDictionary values,RouteDirection routeDirection) 
        { 
            // return true if this is a valid brand
            var _db = new BrandDbContext();
            return _db.Brands.FirstOrDefault(x => x.BrandName.ToLowerInvariant() == 
                values[parameterName].ToString().ToLowerInvariant()) != null; 
        } 
    } 
}

然后,按如下方式定义您的路线(假设您的品牌选择器是主页)：

routes.MapRoute( 
    "BrandRoute","{controller}/{brand}/{action}/{id}",new { controller = "News",action = "Index",id = UrlParameter.Optional },new { brand = new MustBeBrand() }
); 

routes.MapRoute( 
    "Default","",new { controller = "Selector",action = "Index" }
); 

routes.MapRoute( 
    "NotBrandRoute","{*ignoreThis}",action = "Redirect" }
);

然后,在你的SelectorController中：

public ActionResult Redirect()
{
    return RedirectToAction("Index");
}

public ActionResult Index()
{
    // brand selector action
}

如果您的主页不是品牌选择器,或者网站上有其他非品牌内容,则此路由不正确.您将需要BrandRoute和Default之间的其他路线,这些路线与您的其他内容的路线相匹配.