/// <summary>
/// 兑换商品
/// </summary>
/// <param name="userName"></param>
/// <param name="goodsID"></param>
/// <param name="goodsNum"></param>
/// <returns></returns>
public static bool ExchangeGoods(string userName, int goodsID, int goodsNum, string address, string realName, string phone, out string msg)
{
msg = "";
bool success = false;
//判断点数是否足够
//判断商品数量是否足够
//商品数量减去购买数量
//用户已使用点数增加
//写入消费记录
using (DbConnection conn = Db.Helper.CreateConnection())
{
conn.ConnectionString = Db.Helper.ConnectionString;
conn.Open();
DbTransaction tran = conn.BeginTransaction(System.Data.IsolationLevel.Serializable);
try
{
var user = Select(userName, tran);
if (user == null)
{
msg = "用户不存在！";
return(false);
}
var goods = GoodsBLL.SelectGoods(goodsID, tran);
if (goods == null)
{
msg = "商品不存在！";
return(false);
}
if (goods.Num <= 0)
{
msg = "商品已被兑换完！";
return(false);
}
if (goods.Num < goodsNum)
{
msg = "商品库存不足！";
return(false);
}
int remainPoints = user.TotalPoints - user.UsedPoints;
int pointsCost = goods.Points * goodsNum;
if (remainPoints < pointsCost)
{
msg = "点数不足！";
return(false);
}
goods.Num = goods.Num - goodsNum;
user.UsedPoints = user.UsedPoints + pointsCost;
CostHistoryInfo model = new CostHistoryInfo();
model.AddTime = DateTime.Now;
model.CostType = CostType.Exchange;
model.GoodsID = goodsID;
model.GoodsName = goods.Name;
model.GoodsNum = goodsNum;
model.MoneyAfter = user.TotalCost;
model.MoneyBefore = user.TotalCost;
model.OrderNum = "";
model.MoneyCost = 0M;
model.PointsAfter = user.TotalPoints - user.UsedPoints;
model.PointsBefore = remainPoints;
model.PointsCost = pointsCost;
model.ExchangeStatus = ExchangeStatus.WaitingSend;
model.SendTime = GlobalSetting.MinTime;
model.FinishTime = GlobalSetting.MinTime;
model.ExpressName = "";
model.ExpressNum = "";
model.LinkAddress = address;
model.LinkMan = realName;
model.LinkPhone = phone;
model.Remarks = "";
model.UserName = userName;
GoodsBLL.UpdateGoods(goods, tran);
MemberBLL.Update(user, tran);
MemberBLL.AddCostHistory(model, tran);
tran.Commit();
msg = "操作成功！";
success = true;
}
catch (Exception ex)
{
tran.Rollback();
msg = ex.Message;
success = false;
}
}
return(success);
}
