How to get query string parameter from MVC Razor markup?

Question

I want to check the URL parameter in my Razor markup. For example, how do I do something like this:

<div id="wrap" class="@{if (URL "IFRAME" PARAMETER EQUALS 1) iframe-page}">

Mariusz · Accepted Answer · 2019-05-03T17:40:50.297

160

Similar thread

<div id="wrap" class=' @(ViewContext.RouteData.Values["iframe"] == 1 ? /*do sth*/ : /*do sth else*/')> </div>

EDIT 01-10-2014: Since this question is so popular this answer has been improved.

The example above will only get the values from RouteData, so only from the querystrings which are caught by some registered route. To get the querystring value you have to get to the current HttpRequest. Fastest way is by calling (as TruMan pointed out) `Request.Querystring' so the answer should be:

<div id="wrap" class=' @(Request.QueryString["iframe"] == 1 ? /*do sth*/ : /*do sth else*/')> </div>

You can also check RouteValues vs QueryString MVC?

EDIT 03-05-2019: Above solution is working for .NET Framework.
As others pointed out if you would like to get query string value in .NET Core you have to use Query object from Context.Request path. So it would be:

<div id="wrap" class=' @(Context.Request.Query["iframe"] == new StringValues("1") ? /*do sth*/ : /*do sth else*/')> </div>

Please notice I am using StringValues("1") in the statement because Query returns StringValues struct instead of pure string. That's cleanes way for this scenerio which I've found.

edited May 03 '19 at 17:40

answered Jun 28 '12 at 16:03

Mariusz

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Thanks for the hints. This worked:
– TruMan1 Jun 28 '12 at 16:10
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I would add @TruMan1 's comment to your answer. In my case the values weren't in the route data (using nop-commerce) but were accessible via the request. – Ian Sep 26 '14 at 14:16
To clarify - you'd use Request.QueryString for example if the view is being displayed as a consequence of a redirect – Chris Halcrow Jun 28 '16 at 05:13
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You might want to add that beginning with [.NET Core 2.1](https://learn.microsoft.com/en-us/aspnet/core/fundamentals/http-context?view=aspnetcore-2.1) you need to change `Context` to `HttpContext` – Ivan García Topete Sep 10 '20 at 14:47
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That's working..Thanks. @Context.Request.Query["iframe"] – Sedat Kumcu Feb 07 '21 at 10:07
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Going back to update multiple times is appreciated. Thanks for the effort. – Bonez024 Apr 06 '21 at 21:34

score 42 · Answer 2 · answered Jan 31 '18 at 09:01

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If you are using .net core 2.0 this would be:

Context.Request.Query["id"]

Sample usage:

<a href="@Url.Action("Query",new {parm1=Context.Request.Query["queryparm1"]})">GO</a>

answered Jan 31 '18 at 09:01

Florian Schaal

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This gives 'The name Context does not exist in the current context'. Just using Request.Query["queryparm1"] works though. – x5657 Mar 29 '18 at 11:05
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@x5657 you should post your comment as an answer, as it was the only solution that really worked for me! – Jpsy Apr 06 '18 at 12:02

score 15 · Answer 3 · answered Apr 07 '18 at 14:21

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It was suggested to post this as an answer, because some other answers are giving errors like 'The name Context does not exist in the current context'.

Just using the following works:

Request.Query["queryparm1"]

Sample usage:

<a href="@Url.Action("Query",new {parm1=Request.Query["queryparm1"]})">GO</a>

answered Apr 07 '18 at 14:21

x5657

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That didn't work for me but this did: Request.QueryString – TroySteven Sep 15 '19 at 21:33

score 10 · Answer 4 · answered Apr 22 '18 at 00:10

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Noneof the answers worked for me, I was getting "'HttpRequestBase' does not contain a definition for 'Query'", but this did work:

HttpContext.Current.Request.QueryString["index"]

answered Apr 22 '18 at 00:10

Rolando Retana

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Alper Ebicoglu · Answer 5 · 2021-04-05T14:40:33.017

10

for ASP.NET Core 5.0

You can get query parameters by injecting IHttpContextAccessor into the Razor page. And get the value of any parameter with Request.Query object.

Sample URL => https://localhost:44326/?MyParam=MyValue

Index.cshtml:

@inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor

<span>@HttpContextAccessor.HttpContext.Request.Query["MyParam"][0]</span>

Note that there maybe several query parameters with the same name therefore the values are stored in a collection.

edited Apr 05 '21 at 14:40

answered Apr 05 '21 at 14:34

Alper Ebicoglu

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don't forget to add nuget Microsoft.AspNetCore.Http – user160357 Nov 13 '21 at 15:16

score 5 · Answer 6 · answered Jun 28 '12 at 15:41

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I think a more elegant solution is to use the controller and the ViewData dictionary:

//Controller:
public ActionResult Action(int IFRAME)
    {
        ViewData["IsIframe"] = IFRAME == 1;
        return View();
    }

//view
@{
    string classToUse = (bool)ViewData["IsIframe"] ? "iframe-page" : "";
   <div id="wrap" class='@classToUse'></div>
 }

answered Jun 28 '12 at 15:41

YavgenyP

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This view is shared across many controllers. I think this would get messy doing it like this instead of putting the logic directly in the Razor markup. Also I anticipate I may have to do this in partial views as well. – TruMan1 Jun 28 '12 at 16:04
A more elegant solution is to return it as part of a ViewModel `return View(new SomeViewModel{ IsIFrame = IFrame });` – Jose Capistrano Feb 02 '18 at 02:38

score 1 · Answer 7 · answered Oct 17 '18 at 12:41

1

For Asp.net Core 2

ViewContext.ModelState["id"].AttemptedValue

answered Oct 17 '18 at 12:41

Pradip Rupareliya

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I'll just add that although it says `AttempValue` - if the paramter does not exist in the query string you will get an exception so you should first check: `@if (ViewContext.ModelState["id"] != null)...` – adinas Mar 27 '19 at 15:23

How to get query string parameter from MVC Razor markup?

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