C# – Copying HTTP request parameters in call to RedirectToAction

I have been learning C# over the past year and today I encountered a situation with Controller.RedirectToAction() that I took awhile to find a solution to so I wanted to write down my solution.

In my case, I was in a method in a Controller (accessed from a HTTP GET) and needed to invoke RedirectToAction().  However, as part of the call to RedirectToAction() I needed to send along all the HTTP request parameters.

First of all, this is the method in the class FirstController that handled the initial GET request:

[HttpGet]
public ActionResult HandleRequest1() 
{
  // Create a dictionary containing the query string parameters
   var queryStringParams = this.Request.QueryString.AsRouteValueDictionary();
  // Pass the queryStringParams dictionary to RedirectToAction
   return this.RedirectToAction<SecondController>(x => x.HandleRequestTwo(), queryStringParams);
}

Second, this is the method in the class SecondController that was redirectedTo:

public ActionResult HandleRequestTwo() 
{
  string urlParamsStr = HttpContext.Request.Params.ToString();
  NameValueCollection queryParams = HttpUtility.ParseQueryString(urlParamsStr);
  string value1= queryParams["paramKey1"];
  //...
  return new View("SecondView");
}

In the end, it was creating a Dictionary that solved the problem.

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About stevewall123

I am a Lead Software Engineer in Minneapolis working for Thomson Reuters. I am currently working on projects using Java, JavaScript, Spring, Drools, Hazelcast, Liquibase and Tomcat. Previously, I used C#, GWT, Grails, Groovy, JMS and JBoss Drools Guvnor. In the past I have worked on projects using J2EE, Swing, Webwork, Hibernate, Spring, Spring-WS, JMS, JUnit and Ant.
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