public ActionResult Create([Bind(Include = "user_id,user_name,pwd")] UserClass user)
{
ViewBag.isExist = "NO";
if (modelClass.isExist(user))
{
//when isExist user_name
ViewBag.isExist = "Same user name is exist already.";
}
else
{
if (ModelState.IsValid)
{
modelClass.Add(user);
return(RedirectToAction("Index"));
}
}
return(View(user));
}