Using a DataRelation with a 2nd DataRelation

Question

Standard example.  Create a DataSet with 2 related tables, define a DataRealtion, and bind them to 2 dataGridViews.  As you walk the first grid view, the 2nd one shows the related rows.
   DataRelation customerDataRelation = new DataRelation("UsefulRelation",
        customerDataSet.Tables["Customers"].Columns["CustomerID"],
        customerDataSet.Tables["Orders"].Columns["CustomerID"]);
  customerDataSet.Relations.Add(customerDataRelation); 
then display with
 dataGridViewOrderID.DataSource = customerDataSet;
 dataGridViewOrderID.DataMember = "Customers";
            //use data binding with the datagrid view
 orderLinesdataGridView.DataSource = customerDataSet;
 orderLinesdataGridView.DataMember = "Customers.UsefulRelation";
Works nice.
Now I want to add a 3rd datagridview, and a second DataRelation, so that the first view shows the customer, the second shows the order, but when I click on one of the orders in the 2nd grid view, the 3rd one shows the order detail.
So, a table linked to a 2nd table linked to a 3rd table using 2 DataRelations, and then have the datagridviews do the right thing.
Is this possible?
with this 2nd DataRelation
 DataRelation productDataRelation = new DataRelation("productDataRelation",
       customerDataSet.Tables["Orders"].Columns["OrderID"],
      customerDataSet.Tables["OrderDetails"].Columns["OrderID"]);
 customerDataSet.Relations.Add(productDataRelation); 
and this added gui code for the 3rd datagridview
 dataGridViewProductDetail.DataSource = customerDataSet;
 dataGridViewProductDetail.DataMember = "Orders.productDataRelation";
the 3rd datagridview shows one set of values, but will not update.
thanks

Answer 1

the 3rd datagridview shows one set of values, but will not update.
... and what do you mean by "will not update"? That's a little ambiguous.
~~Bonnie DeWitt [C# MVP]
http://geek-goddess-bonnie.blogspot.com