Composite foreign keys/Data bound grid

[Josh]

How do you bind the data bound grid to a dataset that contains a following schema structure such as:

OrderDetails(OrderID, CustomerID, ProductID, Price....)

OrderID AND CustomerID are a composite foreign key into the Orders table

Orders(OrderID, CustomerID......)

OrderID AND CustomerID together make up the primary key of this table

The MappingName property only seems to support one column - how do you bind it to support a composite foreign key structure such as what is listed above?

[Administrator]

If I understand what you are describing (main table having multiple foreign key columns, and you want to display a particular value from the foreign table instead of the foreign), you can do this using ComboBox columns. Set the style.DataSource to the foriegn table, set the style.DisplayMember and style.ValueMember from the columns of the foreign table as well. The ValueMember should also match the value from the main table. If you do not want to see the combo button, als set grid.ShowsButtons = GridShowButtons.None.

[Josh]

Correct, except in this case, the foreign key in the main table is TWO columns - one foreign key composed of two columns, not one. How do you set up the relationships in this case?