Master / Detail form generates FK error upon save when both master and details contains new records

I'm having a typical OrderForm with Order details in a datagridview like in the Northwind DB.

I create a dataset containing Order and Orderdetails.

I drag detils from Order and a gridviw from orderdetails under order.

When I run it, it works fine until I create a new order and enters order details. The temporary orderno -1 creates a foreign key error in orderdetails when I save. I thought the table adapter would take care of this for me?

Any suggestions?

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ekenmanAuthor Commented:
OK, I've got it. I've been sitting with this issue for two days and just becase I entered the question I found the solution.

In the Dataset Designer, right click the relation and choose Edit Relation.

Change the relation from Relation Only to Both Relation and Foreign Key Contraint.

Choose Update Rule to Cascade.

Now it works!

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