Problems with drag drop

Question

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I am trying to drag files from Explorer to my control (a panel)

Initialising code:

VB

Friend Const CtrlMask As Byte = 8

VB

'
'ListView
'
Me.AllowDrop = True
Me.Controls.Add(Me.MainPanel)
Me.Controls.Add(Me.ToolPanel)
Me.Name = "ListView"
Me.ViewMenu.ResumeLayout(False)
Me.ResumeLayout(False)

In the code:

VB

Private Sub ListView_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles Me.DragDrop
   Dim f As String() = CType(e.Data.GetData(DataFormats.FileDrop), String())
   Select Case e.Effect
      Case DragDropEffects.Copy : RaiseEvent FilesDropped(f, True)
      Case DragDropEffects.Move : RaiseEvent FilesDropped(f, False)
   End Select
End Sub

Private Sub ListView_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles Me.DragEnter
   If (e.KeyState And CtrlMask) = CtrlMask Then e.Effect = DragDropEffects.Copy Else e.Effect = DragDropEffects.Move
End Sub

I put a breakpoint on DragEnter but it never gets there.

I cannot see what I am doing wrong. Can anyone else?

Posted 24-Apr-11 1:51am

Stuart Nathan

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strogg · Answer 1 · 2011-04-25T03:50:00

Solution 1

You cannot set your form/panel's AllowDrop and expect it's child controls to become drop targets. Set your ListView control's AllowDrop to true instead.

Posted 25-Apr-11 3:50am

strogg

Comments

Stuart Nathan 25-Apr-11 13:39pm

Listview (first) code above shows Me.AllowDrop = True

Should the form it is on also be set true, although I have tried all combinations.

strogg 25-Apr-11 14:08pm

Try this. Create a new form, add a list view & set AllowDrop to true in the properties, nothing else.
Add a DragEnter event, put some code to test like - Console.Beep(1000,500) in it & try. It's working for me