c# - .NET MVC 中的路由问题

Question

可能重复：
如何通过 URL 获取 RouteData？

public override RouteData GetRouteData(HttpContextBase httpContext)
        {
            var url = httpContext.Request.Headers["HOST"];
            var index = url.IndexOf(".");

            if (index < 0)
                return null;

            var subDomain = url.Substring(0, index);

            if (subDomain != "www" && subDomain != "m")
            {
                var routeData = new RouteData(this, new MvcRouteHandler());
                    routeData.Values.Add("controller", "Business"); 
                    routeData.Values.Add("action", "Display"); 
                    routeData.Values.Add("id", subDomain);
                return routeData;
            }

            if (subDomain == "m")
            {
                var routeData = new RouteData(this, new MvcRouteHandler());
                routeData.Values.Add("controller", "Mobile"); 
                routeData.Values.Add("action", "Index"); 

                return routeData;
            }

            return null;
        }

我的问题是，当我访问xyz.mydomain.com它时，它总是被重新路由到xyz.mydomain.com/Business/Display/xyz. 这阻止了我去，xyz.mydomain.com/Overview因为它正在拾取子域并重定向。

我尝试使用if语句来确定是否指定了控制器，但似乎没有任何效果。有什么建议么？

Answer 1

以防万一其他人需要答案，这是我的解决方案......
这substrings.Length >= 3是一个控制器，然后是一个动作，所以如果你只需要一个控制器，请更改为 2：

public override RouteData GetRouteData(HttpContextBase httpContext)
            {
                var host = httpContext.Request.Headers["HOST"];
                var url = httpContext.Request.RawUrl;
                Regex regex = new Regex("/");
                string[] substrings = regex.Split(url);
                if (substrings.Length >= 3)
                {
                    return null;
                }
                var index = host.IndexOf(".");
                if (index < 0)
                {
                    return null;
                }

                var subDomain = host.Substring(0, index);

                if (subDomain != "www" && subDomain != "m")
                {
                    var routeData = new RouteData(this, new MvcRouteHandler());
                        routeData.Values.Add("controller", "Business"); //Goes to the User1Controller class
                        routeData.Values.Add("action", "Display"); //Goes to the Index action on the User1Controller
                        routeData.Values.Add("id", subDomain);
                    return routeData;
                }

                if (subDomain == "m")
                {
                    var routeData = new RouteData(this, new MvcRouteHandler());
                    routeData.Values.Add("controller", "Mobile"); //Goes to the User2Controller class
                    routeData.Values.Add("action", "Index"); //Goes to the Index action on the User2Controller

                    return routeData;
                }
                return null;
            }