public OrderService()
{
using (var db = new OrderDB())
{
var orderList1 = from o in db.OrderList select o;
orderList = orderList1.ToList();
}
}
public void addOrder(Order b)
{
orderList.Add(b);
count++;
using (var db = new OrderDB())
{
db.OrderList.Add(b);
db.SaveChanges();
}
}
//更改List第num个成员；flag为0，更改订单号，flag为1，更改订单商品名称，flag为2，更改订单客户名称
public bool changeOrder(int num, string s, int flag)
{
try
{
switch (flag)
{
case 0:
orderList[num - 1].orderNum = s;
using (var db = new OrderDB())
{
db.OrderList.Attach(orderList[num - 1]);
db.Entry(orderList[num - 1]).State = EntityState.Modified;
db.SaveChanges();
}
break;
case 1:
orderList[num - 1].orderName = s;
using (var db = new OrderDB())
{
db.OrderList.Attach(orderList[num - 1]);
db.Entry(orderList[num - 1]).State = EntityState.Modified;
db.SaveChanges();
}
break;
default:
orderList[num - 1].orderClient = s;
using (var db = new OrderDB())
{
db.OrderList.Attach(orderList[num - 1]);
db.Entry(orderList[num - 1]).State = EntityState.Modified;
db.SaveChanges();
}
break;
}
return(true);
}
catch (ArgumentOutOfRangeException)
{
Console.WriteLine("需要修改的订单不存在");
return(false);
}
}
public bool deleteOrder(long i)
{
try
{
var result = orderList.SingleOrDefault(a => a.orderNum == i.ToString());
orderList.Remove(result);
count--;
using (var db = new OrderDB())
{
var order = db.OrderList.SingleOrDefault(o => o.orderNum == i.ToString());
db.OrderList.Remove(order);
db.SaveChanges();
}
return(true);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine("该订单不存在");
return(false);
}
}
//通过Linq查询订单 flag为0按订单号查找，flag为1按订单客人名称，flag为2查询总价超过10000的订单
public IEnumerable <Order> searchOrderbyLinq(string s, int flag)
{
switch (flag)
{
case 0:
using (var db = new OrderDB())
{
return(db.OrderList.Where(o => o.orderNum == s).ToList());
}
case 1:
using (var db = new OrderDB())
{
return(db.OrderList.Where(o => o.orderClient == s).ToList());
}
default:
using (var db = new OrderDB())
{
return(db.OrderList.Where(o => o.tot > 10000).ToList());
}
}
}