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Asked: 2026-05-11T07:23:15+00:00

I’m implementing drag and drop functionality between two datagridviews. This works as intended with

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I’m implementing drag and drop functionality between two datagridviews. This works as intended with one exception: it is possible to drag and drop within the same datagridview. This results in duplicated rows. I want to limit the functionality so that I can only drag from one datagridview to another. Does anyone know how this can be achieved? I’m guessing some kind of hit test is required but I’m not sure how to implement this…

The code I am using is as follows:

Private Sub dgvFMAvailable_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles dgvFMAvailable.MouseMove      If e.Button = Windows.Forms.MouseButtons.Left Then         Me.dgvFMAvailable.DoDragDrop(Me.dgvFMAvailable.SelectedRows, DragDropEffects.Move)     End If  End Sub

and 

Private Sub dgvFMSelected_DragDrop(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles dgvFMSelected.DragDrop      Try         Me.SelectFM(CType(e.Data.GetData(GetType(DataGridViewSelectedRowCollection)), DataGridViewSelectedRowCollection))      Finally         e.Effect = DragDropEffects.None     End Try  End Sub
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1 Answer

  1. Just a quick idea. What if when you start the drag you hold the name of the origin grid. When you do the drop check the name, if they are the same object then don’t allow the drop.

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