Table value Validation

How do I perform the following validation on an async table :

For 2 columns (say ID1, ID2) in an Async table (T1) I want to check that the pair values that are already used do not get repeated when adding a row dynamically to the same table.

e.g If the values a,b and c,d are already used then this combination should not repeat, but a,d is allowed.

I would use the “Create Row” action in the Content Provider to create the rows, instead of the “client-side” add row button. You can put your validation code in an action and assign this action to the provider’s “Before Row Created Action”.

hope this helps,