ActionResult parameter coming in as null

Question

I have seen a couple related questions to this, but I cannot seem to solve my exact instance. I have a url such as http://127.0.0.1/UTS/Unit/J0000001. That is, my controller is UTS, my action is Unit and there is an optional parameter c_number.

I have my route configured as follows:

 routes.MapRoute( name: "Unit", url: "{controller}/{action}/{c_number}", defaults: new { controller = "UTS", action = "Unit", c_number = "" } );

Then, my action in my controller as:

 public ActionResult Unit(string c_number) { UnitViewModel uvm = new UnitViewModel(); uvm.unit = pacificRepo.Units.FirstOrDefault(g => g.c_number == c_number); uvm.geoLocation = pacificRepo.GeoLocations.FirstOrDefault(g => g.geo_location.Latitude == uvm.unit.geo_location.Latitude && g.geo_location.Longitude == uvm.unit.geo_location.Longitude); return View(uvm); }

Whenever I go to the example URL I gave above, c_number comes up as null. It should be J0000001. Does anyone see something blatantly obvious that I'm missing?

Is that the only route you have defined?

Ben Foster
– Ben Foster

2014-03-10 23:19:36 +00:00
Commented Mar 10, 2014 at 23:19 — Ben Foster
– Ben Foster, Commented Mar 10, 2014 at 23:19

Selman Genç · Accepted Answer · 2014-03-10 23:29:39Z

1

Since you define it in your Route you don't need to add parameter for your c_number.You can get your value from RouteData dictionary.That c_number parameter has value only if you pass it as QueryString like http://someurl.com/UTS/Unit?c_number="J0000001"

public ActionResult Unit() { var cNumber = RouteData.Values["c_number"].ToString(); }

edited Mar 10, 2014 at 23:29

answered Mar 10, 2014 at 23:18

Selman Genç

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3 Comments

gnychis Over a year ago

Thanks! This works. I am able to extract it as long as it is passed like a QueryString. Is it possible to define the route like I have above? So that you could access it via http://127.0.0.1/UTS/Unit/J0000001. This seems to work if the parameter is named "id" -- is this a special case variable?

Selman Genç Over a year ago

@gnychis RouteData.Values["c_number"] should work with your current RouteConfig.Your definition is correct.just delete the parameter and get the value from RouteData

gnychis Over a year ago

ohhh I see what you mean now. Thanks for this!

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