Model binding in Asp.net MVC

Question

I am redirecting from default page to home page. user has been resolved successfully in the action method. But not the user in tc instance. My default page (previous page) is not strongly typed.

public class HomeController : Controller
{
    //
    // GET: /Home/

    public ActionResult Index(string user, TestClass tc)
    {
        ViewBag.Name = user; // resolved successfully 
        ViewBag.TCName = tc.user; // its null
        return View();
    }

}

public class TestClass
{
    public string user;
}

** Default Page's .cshtml code piece**

<form action="Home" method="post">
        <fieldset>
            <legend>HTML 5</legend>
            <label for="user">required</label>
            <input id="user" type="text" name="user" required="required">

My question is why tc.user is null? [Isn't model binding just string to string match from post variables? if so, tc.user should have been populated as user in action method right?]

You do not provide nearly enough information to make an educated guess, much less a proper diagnosis. — Sam Axe
– Sam Axe, Commented Nov 26, 2013 at 5:29
(string user, TestClass tc) -> user has been resolved. But tc instance is not populated with the user information in the given action method. — Al.
– Al., Commented Nov 26, 2013 at 5:33
i guess you are getting an empty "" to the user(1st parameter) right? when your previous page is not strongly typed you might be just creating class in your parameter(2nd parameter) and invoking it so getting null. — Shiva Saurabh
– Shiva Saurabh, Commented Nov 26, 2013 at 5:41

Gecko · Accepted Answer · 2013-11-26 07:29:22Z

1

The problem is that you cannot post a single value once and retrieve it in two variables. If the form you stated (Default.cshtml) gets posted, the value posted will be like

user : [value input of #user]

There is only one value posted, linked to the name "user". And as we all know we can't have multiple parameters with identical names.

answered Nov 26, 2013 at 7:29

Gecko

1,3641 gold badge14 silver badges27 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Model binding in Asp.net MVC

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related