MDAC 2.5 SDK - ADOX

Keys Append Method, Key Type, RelatedColumn, RelatedTable and UpdateRule Properties Example (VB)

See Also

The following code demonstrates how to create a new foreign key. It assumes two tables (Customers and Orders) exist.

Sub CreateKey()

    Dim kyForeign As New ADOX.Key
    Dim cat As New ADOX.Catalog

    ' Connect the catalog
   cat.ActiveConnection = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
      "Data Source=c:\Program Files\Microsoft Office\" & _
      "Office\Samples\Northwind.mdb;"

    ' Define the foreign key
    kyForeign.Name = "CustOrder"
    kyForeign.Type = adKeyForeign
    kyForeign.RelatedTable = "Customers"
    kyForeign.Columns.Append "CustomerId"
    kyForeign.Columns("CustomerId").RelatedColumn = "CustomerId"
    kyForeign.UpdateRule = adRICascade
    
    ' Append the foreign key
    cat.Tables("Orders").Keys.Append kyForeign
    
    'Delete the Key as this is a demonstration
    cat.Tables("Orders").Keys.Delete kyForeign.Name
End Sub