How can we pass value from controller to view and vise versa

I'm trying to create simple login page, which will validate user.

In my view

<script type="text/javascript">
    $(document).ready(function () {
        $('#btnLogin').click(function () {
            document.location = '@Url.Action("Validateuser", "Login")';
        });
        $('body').css("background", "#517EAD");
        $('body').css("color", "Green");
        $('body').css("margin", "0");
    });
</script>
<div style="background:white;text-align:right;padding:0px 50px;">
      <h2>Please Login</h2>
</div>

<div style="float:right;">
    <table border="0">
<tr>
    <td>
        <label id="lbllogin">LoginID:</label>        
    </td>
    <td>
            <input type="text" id="txtLogin" required placeholder="Prashant" style="border-radius:5px;background:orange;"/>
    </td>
</tr>
<tr>
    <td></td>
    <td>
        <input type="submit" id="btnLogin" value="Login" style="border-radius:15px;background:silver;"/>
    </td>
</tr>
</table>
</div>

How i can pass textbox value to the controller??

I have on controller with 2 actions as follows

namespace MVC.Controllers
{
    public class LoginController : Controller
    {
        //
        // GET: /Login/

        public ActionResult Index() // has Index.cshtml view
        {
            return View();
        }
        
        public ActionResult Validateuser() // has Validateuser.cshtml view
        {
            Login objLogin = new Login();
            int intUser = objLogin.validateUser();
            //ViewData["Msg"] = "Invalid User";
            return RedirectToAction("Index","Login");
        }
    }
}

In above code if you check, in Validateuser() i have not written any logic but i'm trying to redirect to Index.cshtml view and want to pass "Invalid User" massage to the view where i will display.



can i know how can i do this??

thanks in advance

Tags: MVC3