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    lt div id  wrap  class    if  URL  IFRAME  PARAMETER EQUALS 1  iframe-page   gt

User · Answer

For Asp net Core 2  ViewContext ModelState  id   AttemptedValue

User · Answer

Similar thread    lt div id  wrap  class     ViewContext RouteData Values  iframe      1     do sth       do sth else     gt   lt  div gt    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     lt div id  wrap  class     Request QueryString  iframe      1     do sth       do sth else     gt   lt  div gt    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     lt div id  wrap  class     Context Request Query  iframe      new StringValues  1       do sth       do sth else     gt   lt  div gt    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

User · Answer

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    lt a href   Url Action  Query  new  parm1 Request Query  queryparm1      gt GO lt  a gt

User · Answer

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

User · Answer

If you are using  net core 2 0 this would be   Context Request Query  id     Sample usage    lt a href   Url Action  Query  new  parm1 Context Request Query  queryparm1      gt GO lt  a gt

User · Answer

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            lt div id  wrap  class   classToUse  gt  lt  div gt

[c#] How to get query string parameter from MVC Razor markup?

Examples related to c#

Examples related to asp.net

Examples related to asp.net-mvc

Examples related to razor

Examples related to asp.net-mvc-4