public ActionResult ChangeName(User user)
{
string userID = GetUserID();
User oldInfo = userSql.GetUserByID(userID);
bool nameExists = userSql.CheckForName(user.DisplayName);
var displayName = ModelState["DisplayName"];
if (displayName == null || displayName.Errors.Any())
{
TempData["change-error"] = "Invalid Input: Your name hasn't been changed.";
return(View("ChangeUserInfo", oldInfo));
}
else if (nameExists)
{
if (user.DisplayName != oldInfo.DisplayName)
{
TempData["change-error"] = "Sorry, that name is already in use by a different user.";
}
return(View("ChangeUserInfo", oldInfo));
}
userSql.UpdateName(user.DisplayName, userID);
user = userSql.GetUserByID(userID);
TempData["change-success"] = "Name changed successfully";
return(RedirectToAction("ChangeInfoInit", user));
}