public IList <LiuYan> GetAll(User.User u)
 {
     if (1 == u.id)
     {
         return(LiuYan.FindAll());
     }
     else
     {
         return(LiuYan.FindByUserId(u.id));
     }
 }
 public void Delete(LiuYan ly)
 {
     ly.Delete();
 }
 public void Add(LiuYan ly)
 {
     ly.Insert();
 }