Question

Switching to linq is getting much harder.I know I have to use Group by but I don’t know how to use it in LINQ to Entities.already took me 3 hours.I have 4 Tables that are Tbl_Products,Tbl_Orders,Tbl_OrderDetail,Tbl_OrderStatus.

Now I want to get This result for each OrderID that belongs to a specific Email Address.

OrderID
TotallAmount of goods
TotallPrice (Must be retrieved from Tbl_Products)
RefOrderID
Any Ideas?

Thanks in Advance!!!

Answer 1

You don’t need group by here:

from order in db.Tbl_orders
where order.Email == email
select new
{
    OrderId,
    TotalAmount = order.Tbl_OrderDetail.Sum(d => d.Amount),
    TotalPrice = order.Tbl_OrderDetail.Sum(d => d.Tbl_Products.ProductPrice)
}