either way doesnt work. 1st, i make a debug breakpoint to check the value for looping backward. the value are correctly looping from the last to the 1st selected rows. but after the process is done, the grid still shown in reversed way. 2nd, if drop each row at one position down from the previous dropped row, it will be out of index if i drop a row to the last row index.

My code:
If Grid.Selected.Rows(Grid.Selected.Rows.Count - 1).Index > dropIndex Then
   For i As Integer = Grid.Selected.Rows.Count - 1 To 0 Step -1
      uwg.Rows.Move(Grid.Selected.Rows(i), dropIndex)
   Next
Else
   For i As Integer = 0 To Grid.Selected.Rows.Count - 1
      Grid.Rows.Move(uwg.Selected.Rows(i), dropIndex)
   Next
End If

That trick only can solved the problem from dragging the selected rows to an index that is below or after the last selected rows index to prevent it in a reversed order. BUT, if selected altenate rows and dropped in the middle of the selected rows, it still blown.

please assists, thank you.

In that case, I am out of ideas.

Can you post a small sample project which demonstrates the behavior? I will be happy to take a look.

Hi,

It's really rather difficult to create a project out of just a form file like this. Can you create a complete sample project that I can run and see the behavior?

Hi,

I ran your sample and tried dragging rows 1, 2, and 3 down to the bottom and then I tried dragging rows 7, 8, and 9 to the top. In both cases, the rows end up in the same order they started in. So this seems to be working fine.

Is there some other series of steps I need to follow in order to get the problem to occur?

The code I posted here only applies when you are moving rows within the same rows collection. If you are trying to move rows from one collection to another, then the Rows.Move method would not work, in any case.

This doesnt work if we have a hierarchy.

indices are meesed up.

thanks a lot, i think it's working fine now, but i need to add a trick that to allow the drop at the very last row.

If DropIndex < 0 Then

    DropIndex = Grid.Rows.Count

End If

Hi,

Okay, so it looks like your code is quite wisely accounting for the fact that the indices will change when you move a row down, but not when you move a row up. But you are only accounting for this based on the last item in the list. So in this case, you are moving one item up and one item down. In fact, in a case like this, Item 8 really would not move at all, since it is already directly above 9. You really only need to move item 10.

So I think you need to do something like this:

If dropIndex >= 0 Then
            Grid.Selected.Rows.Sort()

            'If Grid.Selected.Rows(Grid.Selected.Rows.Count - 1).Index > dropIndex Then
            '    For i As Integer = Grid.Selected.Rows.Count - 1 To 0 Step -1
            '        Grid.Rows.Move(Grid.Selected.Rows(i), dropIndex)
            '    Next

            'Else
            '    For i As Integer = 0 To Grid.Selected.Rows.Count - 1
            '        Grid.Rows.Move(Grid.Selected.Rows(i), dropIndex)
            '    Next
            'End If

            For i As Integer = Grid.Selected.Rows.Count - 1 To 0 Step -1
                If (Grid.Selected.Rows(i).Index < dropIndex) Then
                    dropIndex -= 1
                End If
                Grid.Rows.Move(Grid.Selected.Rows(i), dropIndex)
            Next
        End If

referred to my previous post, order will be messed up if try this out:-

select alternate Row 8 and 10. Drag and Drop to Row 9.

It became

10

8

9

Correct dropped should be

8

10

9

if select row 10 then 8, i got the correct result. I m really not sure what is going on.

Thanks for helping.