public void Update(Order order)
{
using (var db = new OrderDB()) {
Console.WriteLine(db.Entry(order).State);
db.Entry(order).State = EntityState.Modified;
order.Items.ForEach(
item => db.Entry(item).State = EntityState.Modified);
db.SaveChanges();
}
}
public void Update(Order order)
{
using (var db = new OrderDB()) {
db.Order.Attach(order);
db.Entry(order).State = EntityState.Modified;
order.Items.ForEach(
item => db.Entry(item).State = EntityState.Modified);
db.SaveChanges();
}
}
public void Add(Order order)
{
using (var db = new OrderDB()) {
db.Entry(order).State = EntityState.Added;
db.SaveChanges();
}
}
public void Update(Order newOrder)
{
using (var db = new OrderDB()) {
Order oldOrder = db.Order.Include("Details").SingleOrDefault(o => o.Id == newOrder.Id);
db.OrderItem.RemoveRange(oldOrder.Details);
db.SaveChanges();
}
using (var db = new OrderDB()) {
foreach (OrderDetail detail in newOrder.Details)
{
db.Entry(detail).State = EntityState.Added;
}
//db.SaveChanges();//先保存items部分的修改
db.Entry(newOrder).State = EntityState.Modified;
db.SaveChanges();//保存Order的属性修改
}
}
public void Update(Order order, List <OrderItem> removed, List <OrderItem> newItems)
{
using (var db = new OrderDB()) {
order.Items.AddRange(newItems);
foreach (OrderItem item in order.Items)
{
if (removed.Contains(item))
{
db.Entry(item).State = EntityState.Deleted;
}
else if (newItems.Contains(item))
{
db.Entry(item).State = EntityState.Added;
}
else
{
db.Entry(item).State = EntityState.Modified;
}
}
db.SaveChanges(); //先保存items部分的修改
db.Entry(order).State = EntityState.Modified;
db.SaveChanges(); //保存Order的属性修改
}
}
