Passing object from one action method to another in ASP.NET MVC 3

Question

I am using ASP.NET and MVC 3 in visual studio and have a question about passing an object from one action method(called Search) to another(called SearchResult). I tried using ViewData but it didnt persist down to the View of SearchResult. Below is a snippet of my code, from within a single controller. 'Search' gets called when data has been collected from a form and submit has been called(hence the [HttpPost] declaration):

[HttpPost]
public ActionResult Search(Search_q Q){
 // do some work here, come up with an object of type 'Search_a' 
 // called 'search_answer'.
ViewData["search_answer"] = search_answer;
return RedirectToAction("SearchResults");
}

public ActionResult SearchResult(Search_a answer)
{   
return View(answer);
}

I also tried using RedirectToAction("SearchResults", new {answer = search_answer}); instead of the above call to RedirectToAction but my 'search_answer' still didnt persist to the View. What is the best way to send this Search_a object to the SearchResult View?

Jeyenne · Accepted Answer · 2012-01-13 18:56:04Z

8

You can use TempData to pass the object.

[HttpPost]
public ActionResult Search(Search_q Q){
    // do some work here, come up with an object of type 'Search_a' 
     // called 'search_answer'.
     TempData["search_answer"] = search_answer;
     return RedirectToAction("SearchResult");
}

public ActionResult SearchResult()
{
    var answer = (Search_a)TempData["search_answer"];   
    return View(answer);
}

edited Jan 13, 2012 at 18:56

Jeyenne

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answered Jan 5, 2012 at 1:41

Eranga

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1 Comment

Jeyenne Over a year ago

This worked well, Thanks Eranga. One potential pitfall is that the object can be disposed before it gets used in the view if you have a overridden definition for Dispose in your controller(something VS tends to add in with its auto generated CRUD code).

Nadir Muzaffar · Accepted Answer · 2012-01-05 01:44:18Z

1

If TempData does not suffice (what Eranga suggested), because SearchResult is not somewhat dependent on a Redirect (though you can have checks to get around it), you might want to look at the Request object. You can likely store the data as one of the query parameters via Request.Params. This can take advantage of the ModelBinding filter chain that Asp MVC has.

answered Jan 5, 2012 at 1:44

Nadir Muzaffar

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2 Comments

Jeyenne Over a year ago

thanks I appreciate the suggestion, ill look up the Request Object!

DeepSpace101 Over a year ago

Response.Params is read only - msdn.microsoft.com/en-us/library/…

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