public string Prepaid(int id, double money,int uid)
{
YogaEntities ye = new YogaEntities();
Member cc = ye.Member.FirstOrDefault((ccc) => ccc.Id == id);
if (cc == null) return string.Format("编号为{0}的会员不存在", id);
User u = ye.User.FirstOrDefault((uu) => uu.Id == uid);
if (u == null) return string.Format("编号为{0}的操作员不存在", uid);
cc.CardRestMoney += money;
ye.AddToPrepaidRecord(new PrepaidRecord()
{
Date = DateTime.Now,
MemberId = id,
Money = money,
UserId = uid,
MemberName = cc.Name,
Operater = u.Name,
});
return ye.SaveChanges() == 2 ? "充值成功" : "充值失败";
}