TA貢獻(xiàn)1810條經(jīng)驗 獲得超4個贊
路由引擎將選擇與提供的URL匹配的第一條路由，并嘗試在該路由中使用路由值。
RouteTable
int caseSwitch = 1;switch (caseSwitch){
case 1:
Console.WriteLine("Case 1");
break;
case 1:
Console.WriteLine("Second Case 1");
break;
default:
Console.WriteLine("Default case");
break;}caseSwitch1
RouteGetRouteDataGetVirtualPath
VirtualPath
GetVirtualPath
null
ActionRouteTable
RouteRouteTableRouteValuesnull
nullRouteValues
public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "CustomRoute",
url: "{segment1}/{action}/{id}",
defaults: new { controller = "MyController", action = "Index", id = UrlParameter.Optional }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}CustomRoute
segment1
Default
\Home\AboutCustomRouteRouteValues
segment1 = "Home"
controller = "MyController"
action = "About"
id = {}
AboutMyControllerControllerDefault
public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "CustomRoute",
url: "Custom/{action}/{id}",
// Note, leaving `action` and `id` out of the defaults
// makes them required, so the URL will only match if 3
// segments are supplied begining with Custom or custom.
// Example: Custom/Details/343
defaults: new { controller = "MyController" }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "CustomRoute",
url: "{segment1}/{action}/{id}",
defaults: new { controller = "MyController", action = "Index", id = UrlParameter.Optional },
constraints: new { segment1 = @"house|car|bus" }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}public class CorrectDateConstraint : IRouteConstraint{
public bool Match(HttpContextBase httpContext, Route route, string parameterName,
RouteValueDictionary values, RouteDirection routeDirection)
{
var year = values["year"] as string;
var month = values["month"] as string;
var day = values["day"] as string;
DateTime theDate;
return DateTime.TryParse(year + "-" + month + "-" + day, System.Globalization.CultureInfo.InvariantCulture,
DateTimeStyles.None, out theDate);
}}public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "CustomRoute",
url: "{year}/{month}/{day}/{article}",
defaults: new { controller = "News", action = "ArticleDetails" },
constraints: new { year = new CorrectDateConstraint() }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "CustomRoute",
url: "{segment1}/{segment2}/{action}/{id}",
defaults: new { controller = "MyController" }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}CustomRouteDefault
RouteBase
public class SubdomainRoute : Route{
public SubdomainRoute(string url) : base(url, new MvcRouteHandler()) {}
public override RouteData GetRouteData(HttpContextBase httpContext)
{
var routeData = base.GetRouteData(httpContext);
if (routeData == null) return null; // Only look at the subdomain if this route matches in the first place.
string subdomain = httpContext.Request.Params["subdomain"];
// A subdomain specified as a query parameter takes precedence over the hostname.
if (subdomain == null) {
string host = httpContext.Request.Headers["Host"];
int index = host.IndexOf('.');
if (index >= 0)
subdomain = host.Substring(0, index);
}
if (subdomain != null)
routeData.Values["subdomain"] = subdomain;
return routeData;
}
public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
{
object subdomainParam = requestContext.HttpContext.Request.Params["subdomain"];
if (subdomainParam != null)
values["subdomain"] = subdomainParam;
return base.GetVirtualPath(requestContext, values);
}}public class RouteConfig{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.Add(new SubdomainRoute(url: "somewhere/unique"));
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}}注：
這里真正的問題是，大多數(shù)人認(rèn)為他們的路線都應(yīng)該看起來像 Default路線。收到，粘貼，完成，對吧？不對。
這種方法通常會產(chǎn)生兩個問題：
幾乎所有其他路由都應(yīng)該至少有一個文字段(如果您喜歡這類內(nèi)容，則應(yīng)該有一個約束)。 最符合邏輯的行為通常是使其他路線具有 所需
片段。
另一個常見的誤解是，可選段意味著您可以省略。 任何段，但在現(xiàn)實中，您只能離開最右邊的一段或幾段。
微軟成功地實現(xiàn)了基于路由約定的、可擴(kuò)展的和強(qiáng)大的路由協(xié)議.他們沒能直觀地理解。幾乎每個人第一次嘗試都失敗了(我知道我成功了！)幸運(yùn)的是，一旦你了解了它的工作原理，就不難了。
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