static public void ModifyOrder(Order newOrder)
{
using (var context = new OrderServiceContext())
{
var order = context.Orders.FirstOrDefault(o => o.Order_ID == newOrder.ID);
if (order != null)
{
order.Name = newOrder.Name;
order.Address = newOrder.Address;
order.OrderTime = newOrder.OrderTime;
var query = context.Items
.Where(i => i.OrderID == newOrder.ID);
List <DB_OrderItem> items = query.ToList();
foreach (OrderItem item in newOrder.orderItems)
{
var db_item = new DB_OrderItem()
{
Name = item.Name,
Price = item.Price,
Quantity = item.Quantity,
OrderID = newOrder.ID
};
if (items.Contains(db_item))
{
continue;
}
AddItem(item, newOrder.ID);
}
}
}
}
static public List <Order> LoadData()
{
List <Order> orders = new List <Order>()
{
};
using (var context = new OrderServiceContext())
{
orders = Decoder(context.Orders);
}
return(orders);
}
static public void DeleteOrder(int orderID)
{
using (var context = new OrderServiceContext())
{
var order = context.Orders.Include(o => o.OrderItems).FirstOrDefault(o => o.Order_ID == orderID);
if (order != null)
{
context.Orders.Remove(order);
context.SaveChanges();
}
}
}
static public List <Order> InquireByCustomer(string customerName)
{
List <Order> result;
using (var context = new OrderServiceContext())
{
var query = context.Orders
.Where(o => o.Name == customerName);
result = Decoder(query);
}
if (result.Count == 0)
{
return(null);
}
return(result);
}
static public Order InquireByID(int orderID)
{
List <Order> result;
using (var context = new OrderServiceContext())
{
var query = context.Orders
.Where(o => o.Order_ID == orderID);
result = Decoder(query);
}
if (result.Count == 0)
{
return(null);
}
return(result[0]);
}
static void AddItem(OrderItem item, int orderID)
{
var db_item = new DB_OrderItem()
{
Name = item.Name,
Price = item.Price,
Quantity = item.Quantity,
OrderID = orderID
};
using (var context = new OrderServiceContext())
{
context.Entry(db_item).State = EntityState.Added;
context.SaveChanges();
newItemID = db_item.ItemID;
}
}
static public List <Order> InquireByCommodity(string commodityName)
{
List <Order> result;
using (var context = new OrderServiceContext())
{
var query = from order in context.Orders
join item in context.Items on order.Order_ID equals item.ItemID
where item.Name.Contains(commodityName)
select order;
result = Decoder(query);
}
if (result.Count == 0)
{
return(null);
}
return(result);
}
static List <OrderItem> GetItems(int orderID)
{
List <OrderItem> items = new List <OrderItem>()
{
};
using (var context = new OrderServiceContext())
{
var query = context.Items
.Where(i => i.OrderID == orderID);
foreach (var db_item in query)
{
OrderItem item = new OrderItem();
item.Goods.Name = db_item.Name;
item.Goods.Price = db_item.Price;
item.Quantity = db_item.Quantity;
items.Add(item);
}
}
return(items);
}
static public void AddOrder(Order newOrder)
{
using (var context = new OrderServiceContext())
{
var db_order = new DB_Order()
{
Name = newOrder.Name,
Address = newOrder.Address,
OrderTime = newOrder.OrderTime,
OrderItems = new List <DB_OrderItem>()
{
}
};
context.Entry(db_order).State = EntityState.Added;
context.SaveChanges();
newOrderID = db_order.Order_ID;
}
//List<DB_OrderItem> DB_items = new List<DB_OrderItem>() { };
foreach (OrderItem item in newOrder.orderItems)
{
AddItem(item, newOrderID);
}
}