How to redirect and pass a strongly-typed viewmodel to another action method?

I have 2 controllers: AliceController and BobController. Each contains Index action method. The viewmodel is simple as follows:

class Foo{[Required]public int data{get;set;}}

How to pass the strongly typed object from Alice to Bob?

class AlliceController: Controller
{

    [HttpPost]
     public ActionResult Index(Foo foo)
     {
         if(ModelState.IsValid)
         {
          // I want to pass foo to Bob's Index. How to do it?
           return RedirectToActio开发者_JAVA技巧n("Index","Bob");
          }
         else    return View();
     }
}

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In theory, you can use the RouteValueDictionary parameter to RedirectToAction:

return RedirectToAction("Index", "Bob", new { param = value });

However, you cannot pass an object*via this type of redirection, only primitive types that can be tacked onto the GET url (int, string, etc).

Use TempData instead.

That being said, i have no idea what you are attempting to do.

Some concerns:

• Why not just pass the actual value, instead of the entire ViewModel?
• Why are you redirecting between controllers? (this can be done, just don't see the reason for it in your scenario).

---

Can't you just instantiate a BobController and return the result of the it's index method, passing in Foo?

---

I am not sure that you can pass a strongly typed object via Redirection.

You can instead pass just parameters

RedirectToAction( new RouteValueDictionary( 
     new{ 
          controller = "Blah", 
          action = "Blah", 
          foo = "Bar" 
     } 
));