根据list集合的某个对象变量新增变量

List<User_charge_recordView> newlist = list.Select(a => { string PayTypeName = "";//新增变量根据type获取值 switch (a.type) { case -2: PayTypeName = "运单付款"; break; case 1: PayTypeName = "充值"; break; case 2: PayTypeName = "运单退款"; break; case 3: PayTypeName = "系统扣款"; break; case 4: PayTypeName = "用户提现"; break; case 5: PayTypeName = "返利"; break; default: PayTypeName = "其他"; break; } return new User_charge_recordView() { type = a.type, usercno = a.usercno, username = a.username, currency = a.currency, balance = a.balance, amount = a.amount, afterpay = a.afterpay, posttime = a.posttime, remark = a.remark, administrator = a.administrator, Id = a.Id, PayTypeName = PayTypeName }; }).ToList();