CODEWITHSUNDEEP
asp.net-mvc-2request.querystring
user990635
user990635

Reputation: 4249

Request.QueryString in MVC

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

Upvotes: 1

Views: 6658

Answers (4)

Tommy
Tommy

Reputation: 39807

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

Upvotes: 2

Hector Correa
Hector Correa

Reputation: 26690

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
);

Upvotes: 0

balexandre
balexandre

Reputation: 75073

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 }
);

Upvotes: 2

Yuriy Faktorovich
Yuriy Faktorovich

Reputation: 68667

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.

Upvotes: 0

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