Drop Down List in Grid is dependent on Dropdown List at Level 0

Question

Hi All,
In my secondary page, there are three Drop-Down List Boxes D1, D2 and D3.
D3 is in grid at Level 1 on secondary page and the prompt Table in D3 have 3 Keys.Key 1 and Key 2 are the same field as D1 and D2.As D3 is dependent on D1 and D2.
First time, D3 remains empty even i select values in D1 and D2 but when i EndModal(1) and then come back , D3 has values.
What is happening ?
What is the solution of this scenario ?
Thanks for your help in advance.

Answer 1

D3 is in GRID_RECORD at Level 1.
As Grid Record is totally dependent on D1 and D2.
therefore, On field Change of D2 ,
I delete the Grid Record,
for &i = GRID_RECORD.ActiveRowCount to 1 Step -1
GRID_RECORD.DeleteRow(&i);
End-for;
As a Result, The Default Row only present at Grid_Record, and D3 has no values.
so i also include in field change of D2
for &i = GRID_RECORD.ActiveRowCount to 1 Step -1
GRID_RECORD.DeleteRow(&i);
End-for;
Local Rowset &RowSetGRID_RECORD;
&RowSetGRID_RECORD =GetLevel0()(1).GetRowSet(Scroll.GRID_RECORD);
&RowSetGRID_RECORD(1).GRID_RECORD.KEY1.VALUE = D1.Value;
&RowSetGRID_RECORD(1).GRID_RECORD.KEY2.VALUE = D2.Value;
Now D3 has values.
Am i doing right, or there is any better solution ?