Request.QueryString in MVC

Question

In my HomeController I'm trying to get information using Request.QueryString

        string aa = Request.QueryString["aa"];
        string bb = Request.QueryString["bb"];

So In the address bar I am expecting something like:

< something >?aa=12345&bb=67890

I created a new route:

        routes.MapRoute(
            "Receive",
            "Receive",
            new { controller = "Home", action = "Index" }
        );

And I'm trying to use it in this way:
http://localhost:54321/Receive?aa=12345&bb=67890

But I'm getting the following error:

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Requested URL: /Receive

You don't need to use Reuqest.Querysting. Use the parameters of the Action. — Yuriy Faktorovich
– Yuriy Faktorovich, Commented Nov 7, 2011 at 6:43
I'm getting this part: ?aa=12345&bb=67890 from an outside source — user990635
– user990635, Commented Nov 7, 2011 at 6:46
I think your routing is goofed which is why you are getting a 404. Please look at some tutorials, specifically here: asp.net/mvc/tutorials/asp-net-mvc-routing-overview-cs Also, like @YuriyFaktorovich says, you really shouldn't be using Request.QueryString, but rather passing those as parameters to your action method (Function Retrieve(byval aa as string, byval bb as string) as actionresult) — Tommy
– Tommy, Commented Nov 7, 2011 at 6:47
Thanks Tommy, I just had to put my route first and it solved all the question with the QueryString! :) — user990635
– user990635, Commented Nov 7, 2011 at 7:14
Awesome - glad that worked for you! I am going to put that as the answer, feel free to mark it when you get a chance. — Tommy
– Tommy, Commented Nov 7, 2011 at 15:38

Tommy · Accepted Answer · 2011-11-07 15:42:06Z

2

I think your routing is goofed which is why you are getting a 404. Please look at some tutorials, specifically here: asp.net/mvc/tutorials/asp-net-mvc-routing-overview-cs

Also, like @YuriyFaktorovich says, you really shouldn't be using Request.QueryString, but rather passing those as parameters to your action method

Example in VB:

Function Retrieve(ByVal aa as String, ByVal bb as String) as ActionResult

answered Nov 7, 2011 at 15:42

Tommy

39.9k10 gold badges93 silver badges125 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Tommy Over a year ago

@Bojangles - yes they do. It is a language that has been around for over 20 years. VB still has a very active and large community. But, thanks for your insights.

balexandre · Accepted Answer · 2011-11-07 06:48:20Z

You can access the Query String values in 2 ways...

grab the values in the controller initialization
use the values in your action
specifying the route with those variables

1 - grab the values in the controller initialization

protected override void Initialize(RequestContext requestContext) {
    // you can access and assign here what you need and it will be fired
    //  for every time he controller is initialized / call

    string aa = requestContext.HttpContext.Request.QueryString["aa"],
           bb = requestContext.HttpContext.Request.QueryString["bb"];

    base.Initialize(requestContext);
}

2 - use the values in your action

public void ActionResult Index(string aa, string bb) {
    // use the variables aa and bb, 
    //  they are the routing values for the keys aa and bb
}

3 - specifying the route with those variables

routes.MapRoute(
    "Receive",
    "Receive/{aa}/{bb}",
    new { 
        controller = "Home", 
        action = "Index", 
        aa = UrlParameter.Optional, 
        bb = UrlParameter.Optional }
);

Yuriy Faktorovich · Accepted Answer · 2011-11-07 06:44:59Z

0

Use "Receive/" for the url in the route, and don't use Request.Querystring.

You can modify your action to be

public ActionResult Index(string aa, string bb) {...}

The ASP.Net MVC framework will hydrate those items for you.

answered Nov 7, 2011 at 6:44

Yuriy Faktorovich

68.9k14 gold badges107 silver badges150 bronze badges

Comments

Hector Correa · Accepted Answer · 2011-11-07 13:46:56Z

Your HTTP 404 error is because your new route is very likely in the wrong place. Make sure your new route is before the default route:

routes.MapRoute(
        "Receive",
        "Receive",
        new { controller = "Home", action = "Index" }
    ); 

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

Collectives™ on Stack Overflow

Request.QueryString in MVC

4 Answers 4

1 Comment

Comments

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

Comments

Comments

Related