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 · 2019-05-03 17:40:50Z

169

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 3, 2019 at 17:40

answered Jun 28, 2012 at 16:03

Mariusz

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6 Comments

TruMan1 Over a year ago

Thanks for the hints. This worked: <div id="wrap" class="@(Request.QueryString["iframe"] == "1" ? "iframe" : string.Empty)">

Ian Over a year ago

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.

Ivan García Topete Over a year ago

You might want to add that beginning with .NET Core 2.1 you need to change Context to HttpContext

Sedat Kumcu Over a year ago

That's working..Thanks. @Context.Request.Query["iframe"]

Bonez024 Over a year ago

Going back to update multiple times is appreciated. Thanks for the effort.

|

Florian Schaal · Accepted Answer · 2018-01-31 09:01:18Z

46

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, 2018 at 9:01

Florian Schaal

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2 Comments

x5657 Over a year ago

This gives 'The name Context does not exist in the current context'. Just using Request.Query["queryparm1"] works though.

Jpsy Over a year ago

@x5657 you should post your comment as an answer, as it was the only solution that really worked for me!

x5657 · Accepted Answer · 2018-04-07 14:21:45Z

16

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 7, 2018 at 14:21

x5657

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1 Comment

TroySteven Over a year ago

That didn't work for me but this did: Request.QueryString

Alper Ebicoglu · Accepted Answer · 2021-04-05 14:40:33Z

14

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 5, 2021 at 14:40

answered Apr 5, 2021 at 14:34

Alper Ebicoglu

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2 Comments

user160357 Over a year ago

don't forget to add nuget Microsoft.AspNetCore.Http

Roboblob Over a year ago

this worked for me even without Microsoft.AspNetCore.Http in .net core 7.0 core web api

Rolando Retana · Accepted Answer · 2018-04-22 00:10:34Z

11

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, 2018 at 0:10

Rolando Retana

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Comments

YavgenyP · Accepted Answer · 2012-06-28 15:41:40Z

5

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, 2012 at 15:41

YavgenyP

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2 Comments

TruMan1 Over a year ago

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.

Jose Capistrano Over a year ago

A more elegant solution is to return it as part of a ViewModel return View(new SomeViewModel{ IsIFrame = IFrame });

Pradip Rupareliya · Accepted Answer · 2018-10-17 12:41:39Z

1

For Asp.net Core 2

ViewContext.ModelState["id"].AttemptedValue

answered Oct 17, 2018 at 12:41

Pradip Rupareliya

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1 Comment

adinas Over a year ago

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)...

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