public List <Order> GetAllOrders()
{
using (var db = new OrderDB())
{
return(db.Order.Include("OrderDetails").ToList <Order>());
}
}
public List <Order> QueryByCustormer(String cusName)
{
using (var db = new OrderDB())
{
return(db.Order.Include("OrderDetails")
.Where(o => o.Cus.Name == cusName).ToList <Order>());
}
}
public Order GetOrder(String Id)
{
using (var db = new OrderDB())
{
return(db.Order.Include("OrderDetails").
SingleOrDefault(o => o.Id == Id));
}
}
public List <Order> QueryAbovePrice(double price)
{
using (var db = new OrderDB())
{
var query = db.Order.Include("OrderDetails")
.Where(o => o.TotPrice >= price);
return(query.ToList <Order>());
}
}
public List <Order> QueryByGoods(String productName)
{
using (var db = new OrderDB())
{
var query = db.Order.Include("OrderDetails")
.Where(o => o.OrderDetails.Where(
detail => detail.Name.Equals(productName)).Count() > 0);
return(query.ToList <Order>());
}
}
public void Delete(String orderId)
{
using (var db = new OrderDB())
{
var order = db.Order.Include("OrderDetails").SingleOrDefault(o => o.Id == orderId);
db.OrderDetail.RemoveRange(order.OrderDetails);
db.Order.Remove(order);
db.SaveChanges();
}
}
public void Add(Order order)
{
using (var db = new OrderDB())
{
db.Order.Add(order);
//db.Order.Attach(order);
db.Entry(order).State = EntityState.Added;
db.SaveChanges();
}
}
public void UpdateOr(Order order)
{
using (var db = new OrderDB())
{
db.OrderDetail.RemoveRange(order.OrderDetails);
db.Order.Remove(order);
db.Order.Add(order);
db.Entry(order).State = EntityState.Added;
db.SaveChanges();
}
}
//在数据库里存在的内容上进行修改
public void Update(Order order)
{
using (var db = new OrderDB())
{
db.Order.Attach(order);
db.Entry(order).State = EntityState.Modified;
order.OrderDetails.ForEach(
detail => db.Entry(detail).State = EntityState.Modified);
db.SaveChanges();
}
}