ASP.net MVC路由

Question

I just created below action in my controller:

public ActionResult Serial(string letterCase)
{
    string serial = "SAM_ATM_1.0.0";
    if (letterCase == "lower")
    {
        return Content(serial.ToLower());
    }
    return Content(serial);
}

and added below routing rules above default action:

routes.MapRoute(
    name: "Serial",
    url: "serial/{letterCase}",
    defaults: new { controller = "Home", action = "Serial", letterCase = "upper" }
);

However calling url http://localhost:5532/home/serial/lower in debug session, letterCase is passed with null value.

Answer 1

Because you call localhost:5532/ home /serial/lower, try to call localhost:5532/serial/lower

or, if you need localhost:5532/home/serial/lower, rewrite your route rule to

routes.MapRoute(
    name: "Serial",
    url: "home/serial/{letterCase}",
    defaults: new { controller = "Home", action = "Serial", letterCase = "upper" }
);