Let's say I have Order class as follows.
class Order
{
public Guid ID { get; set; }
public int ProductID { get; set; }
public int CategoryID { get; set; }
}
In order, I get a list of orders from database and populate in local list that is declared as follows.
List<Order> Orders = new List<Order>();
I also have a cached list of orders that only contains Order.ID field.
List<Guid> CachedOrderIDs;
Now I want to modify following query to include Orders that are presnted in CachedOrderIDs.
var o = Orders.Where(m => m.ProductID > 200 && m.CategoryID > 500).ToList();
How can I do this?
Use Contains
method:
var o = Orders.Where(m => m.ProductID > 200 &&
m.CategoryID > 500 &&
CachedOrderIDs.Contains(m.ID)).ToList();
You could try this one:
var o = Orders.Where(m => m.ProductID > 200 &&
m.CategoryID > 500 &&
CachedOrderIDs.Contains(m.Guid)
).ToList();
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