Question

I have a hidden field in my HTML view

<%:Html.HiddenFor(model=>model.ContactId) %>  

I want to put this value in viewBag so that I can use it in controller. How to do that? Also, how will I access this in controller?

Answer 1

You don’t have the notion of postback in ASP.NET MVC and the ViewBag is available to you to deliver data to the view, but not to transfer data back and forth between the view and the controller.

If your hidden input is in a form then upon posting the form the new value would be accessible via model.ContactId.

Example:

// Model
class TestModel
{
     public string ContactId { get; set; }
}

//Controller
[HttpPost]
public ActionResult Edit(TestModel model)
{
    string newId = model.ContactId;
}