MVC3 null Querystring Returned To Action Method

Question

It seems that once I define my Form like -->
using (Html.BeginForm("Create", "MyController", FormMethod.Post, new { id = "myForm" }))

The additional parameters being passed are now null.

MyController/Create/4?pid=61&status=Initiated

pid and status returns null although the parameters are being passed as above. What is causing these querystring parameters to be be null?

Using Request["myparameter"] or simply getting value from action method parameter returns null.

Answer 1

尝试这个

Html.BeginForm("Create", "MyController", new { pid = Request.QueryString["pid"] },   FormMethod.Post, new { id = "myForm" }))

Answer 2

What you are saying is very weird as the following works perfectly fine for me:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public ActionResult Index(string pid, string foo)
    {
        // the pid and foo parameters are correctly assigned here
        return View();
    }
}

and in the view:

@using (Html.BeginForm("Index", "Home", new { pid = "63" }, FormMethod.Post, new { id = "myForm" }))
{
    @Html.TextBox("foo", "some value")
    <input type="submit" value="OK" />
}