public void AddFriend(string nickname)
{
Users user = Session["CurrentUser"] as Users;
if (user == null)
{
throw new Exception("用户尚未登陆！");
}
Messages msg = new Messages();
msg.Classify = 3;
msg.Receiver = nickname;
msg.SendTime = DateTime.Now;
msg.Sender = user.Nickname;
MessageManager mm = new MessageManager();
mm.AddFriend(msg);
}
