how disable button in control mvc

<input class="btn btn-primary btn-default" name="commit" value="edit" type="submit"   />

[HttpPost]
     [ValidateAntiForgeryToken()]

      public ActionResult EditUser(User postData, object usecaseobject)
      {
            if (ModelState.IsValid)
           {
              string status = "1";
              User _User = new User();

                  db.Entry(postData).State = EntityState.Modified;
                  db.SaveChanges();
                  ViewBag.name = "succss";
                  //here disable button

          }
            return View(postData);

      }