internal void InitVars()
{
_columnOrderID = Columns["OrderID"];
_columnCustomerID = Columns["CustomerID"];
_columnEmployeeID = Columns["EmployeeID"];
_columnOrderDate = Columns["OrderDate"];
_columnRequiredDate = Columns["RequiredDate"];
_columnShippedDate = Columns["ShippedDate"];
_columnShipVia = Columns["ShipVia"];
_columnFreight = Columns["Freight"];
_columnShipName = Columns["ShipName"];
_columnShipAddress = Columns["ShipAddress"];
_columnShipCity = Columns["ShipCity"];
_columnShipRegion = Columns["ShipRegion"];
_columnShipPostalCode = Columns["ShipPostalCode"];
_columnShipCountry = Columns["ShipCountry"];
}