VB-APP: How to determine rows of a child based on parent row selected.

[nev]

Good day Sirs & Madams, I know some of you will find this problem very simple. Kindly share a little knowledge to me on how to deal with this. Thank you.

I have a parent-child table relation. when bsParent is navigated, bsChild follows. In code, I did this to determine the rowstate:

dim dtParent as datatable = ds.Parent.copy
for i as integer to dtParent.defaultview.count - 1
if dtParent.defaultview(i).row.rowstate = datarowstate.modified then
'code to process
else
dim dtChild as datatable = ds.Child.copy
 for j as integer to dtChild.defaultview.count - 1
if dtChild.defaultview(j).row.rowstate = datarowstate.modified then
'code to process
end if
next
end if
next
 

If you notice the bold statement, what I am checking is the total child rows. I need to determine how to get only the child rows with respect to the parent row that is selected.

Please help me kind Sirs & Madams. Thank you.

[nev]

I tried:

dtChild.defaultview.rowfilter = bsChild.filter
dtChild.defualtview.sort = bsChild.sort

but it didn't work.