drag and drop to tablelayoutpanel from listview - vb.net

Question

I am trying to build a control which implements a tablelayoutpanel for the design and placement of other controls within the control - I need to add functionality which will allow the tablelayoutpanel to accept content from a listview (It does not even need to process it in any fashion at this point) - I, however, can not get the tablelayout panel to even display that it will accept data - only displays the circle/slash symbol. These are kept in 2 separate child mdi forms within the same parent.
currently I have in my listview form
Private Sub Jboard_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.AllowDrop = True
ListView2.AllowDrop = True
end sub
Private Sub ListView2_DragOver(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles Me.DragOver, ListView2.DragOver
If e.Data.GetDataPresent(GetType(ListViewItem)) Then
e.Effect = DragDropEffects.All
End If
End Sub
Private Sub ListView2_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListView2.MouseDown
Dim item As ListViewItem = ListView2.HitTest(e.Location).Item
If item IsNot Nothing Then
ListView2.DoDragDrop(item, DragDropEffects.All)
End If
End Sub
on my new tablelayoutpanel control form I have
Me.AllowDrop = True
DboardScheduler1.AllowDrop = True
'dboardscheduler1 is my new control
in the code for the control I have
tablelayoutpanel1.AllowDrop = true
What am I missing?

Answer 1

It looks like you only coded the one side, you also need to tell the TLP(like) control how/what to do. Something like this (not sure of the constraints you want, like JUST LVs and only MOVE).
' NOT mousedown
Private Sub ItemDrag(sender As Object, e As ItemDragEventArgs) Handles ...
If e.Button <> Windows.Forms.MouseButtons.Left Then Exit Sub
' ToDo: Decide what to do with multiples. Singles only assumed
' add the item under the cusor as the first, effect as Move
DoDragDrop(e.Item, DragDropEffects.Move)
End Sub
LV Drag OVer:
' probably:
e.Effect = DragDropEffects.None
' because you cant really drop it here, but the No Action shows that it knows
' a D-D is happening.
TLP Drag OVer:
If (e.Data.GetDataPresent(GetType(ListViewItem)) = False) Then
e.Effect = DragDropEffects.None
Exit Sub
Else
e.Effect = DragDropEffects.Move ' or link maybe
End If
TLP DragDrop:
Dim dragLVI As ListViewItem
' get text and do whatever with it
If (e.Data.GetDataPresent(GetType(ListViewItem)) = False) Then
e.Effect = DragDropEffects.None
Exit Sub
Else
dragLVI = CType(e.Data.GetData(GetType(ListViewItem)), _
ListViewItem)
newTextThing = dragLVI.SubItems(0).Text
End If
Something along those lines. The point is that you have to write code for the piece being dropped on.