MVC3 自定义路由 Kevin

一、 自定义路由需要继承RouteBase类

RouteBase类有两个抽象方法：1.GetRouteData和GetVirtualPath

GetRouteData用于重构RouteData数据，GetVirtualPath用于重写产生的URL。

下面通过一个例子来说明如何自定义自己的路由：

1. 新建一个Controller

namespace URLsAndRoutes.Controllers {
public class LegacyController : Controller {
public ActionResult GetLegacyURL(string legacyURL) {
return View((object)legacyURL);
}
}
}

2.自定义路由类

public class LegacyRoute : RouteBase {
private string[] urls;
public LegacyRoute(params string[] targetUrls) {
urls = targetUrls;
}
public override RouteData GetRouteData(HttpContextBase httpContext) {
RouteData result = null;
string requestedURL =
httpContext.Request.AppRelativeCurrentExecutionFilePath;
if (urls.Contains(requestedURL, StringComparer.OrdinalIgnoreCase)) {
result = new RouteData(this, new MvcRouteHandler());
result.Values.Add("controller", "Legacy");
result.Values.Add("action", "GetLegacyURL");
result.Values.Add("legacyURL", requestedURL);
}
return result;
}
public override VirtualPathData GetVirtualPath(RequestContext requestContext,
RouteValueDictionary values) {
return null;
}
}

3.在Global.acax.cs文件中注册自定义路由

public static void RegisterRoutes(RouteCollection routes) {
routes.Add(new LegacyRoute(
"~/articles/Windows_3.1_Overview.html",
"~/old/.NET_1.0_Class_Library"));
routes.MapRoute("MyRoute", "{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional });
}

运行程序

二、自定义生成URL

重写VirtualPathData方法：

public override VirtualPathData GetVirtualPath(RequestContext requestContext,
RouteValueDictionary values) {
VirtualPathData result = null;
if (values.ContainsKey("legacyURL") &&
urls.Contains((string)values["legacyURL"], StringComparer.OrdinalIgnoreCase)) {
result = new VirtualPathData(this,
new UrlHelper(requestContext)
.Content((string)values["legacyURL"]).Substring(1));
}
return result;
}

在页面中添加连接：

@Html.ActionLink("Click me", "GetLegacyURL", new { legacyURL =
"~/articles/Windows_3.1_Overview.html" })

三、自定义路由处理类

Mvc默认使用 MvcRouteHandler来处理URL，同时，MVC框架允许我们自定义自己的RouteHandler类。我们只需要实现IRouteHandler类：

public class CustomRouteHandler : IRouteHandler {
public IHttpHandler GetHttpHandler(RequestContext requestContext) {
return new CustomHttpHandler();
}
}
public class CustomHttpHandler : IHttpHandler {
public bool IsReusable {
get { return false; }
}
public void ProcessRequest(HttpContext context) {
context.Response.Write("Hello");
}
}

然后在注册一下：

public static void RegisterRoutes(RouteCollection routes) {
routes.Add(new Route("SayHello", new CustomRouteHandler()));
routes.MapRoute("MyRoute", "{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional });
}