public ActionResult Join(string roomName, string username) { RoomModel room = roomDal.GetChatRoom(roomName); if (room != null) { roomDal.LeaveChatRooms(username); roomDal.JoinChatRoom(room.Id, username); return(RedirectToAction("View", "Rooms", new { id = room.Id })); } return(RedirectToAction("Index", "Rooms")); }