Filter scheme is the generalization of Field | Value. Field | Value scheme is the special case of Filter that allows using a FilterObject to achieve multi-field Key assignments query, as follows:
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// from RDB Order orderFilter3 = new Order(); orderFilter3.CustomerID = "AROUT"; orderFilter3.ShipVia = 2; ObjectSet orders3 = om.GetObjectSet(orderFilter3); // from ObjectSet ObjectSet orders =
...; Order filter = new Order(om); filter.ShipVia = 1; filter.EmployeeID = 7; // get Sub ObjectSet ObjectSet subOrders
= orders.GetSubSet(filter); // find a DataObject Order o = (Order)orders.Find(filter); |
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