ASP.NET MVC3 中的UrlRewrite用法介绍

继承RouteBase后需要实现两个方法：

public override RouteData GetRouteData(HttpContextBase httpContext)
{
    throw new NotImplementedException();
}

public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
{
    throw new NotImplementedException();
}

public override RouteData GetRouteData(HttpContextBase httpContext)
{
    string controller = "Home";
    string action = "Index";
    string id = "beijing";

    var data = new RouteData(this, new MvcRouteHandler()); //声明一个RouteData，添加相应的路由值
    data.Values.Add("controller", controller);
    data.Values.Add("action", action);

    // 获取请求的url
    var url = httpContext.Request.Url;
    if (url == null)
    {
        data.Values.Add("id", id);
        return data;
    }

    string virtualPath = url.ToString();
    string param = virtualPath.Replace("http://", "").Split('.')[0];

    if (param.Equals("www"))
    {
        data.Values.Add("id", id);
        return data;
    }

    id = param;
    data.Values.Add("id", id);
    return data;
}

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    // 【注意】url重写的调用加在这里
    routes.Add(new UrlProvider());

    routes.MapRoute(
        "Default", // Route name
        "{controller}/{action}/{id}", // URL with parameters
        new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
    );

}

public ActionResult Index(string id)
{
    switch (id)
    {
        case "beijing":
            ViewBag.CityName = "北京";
            break;

        case "shanghai":
            ViewBag.CityName = "上海";
            break;
    }

    string p1 = Request.QueryString["p1"];
    string p2 = Request.QueryString["p2"];

    ViewBag.P1 = p1;
    ViewBag.P2 = p2;

    return View();
}