Need DropFile example for dragging multiple files at once

Example requests & Code samples for GdPicture Toolkits.
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grama
Posts: 2
Joined: Thu Oct 18, 2012 9:09 pm

Need DropFile example for dragging multiple files at once

Post by grama » Mon Jun 10, 2013 9:51 pm

ActiveX version had a "dropfiles" event where we could handle multiple files being dropped by the user from a Windows Explorer window. The newer 9.4 .Net version only provide support for "dropfile" event, and only recognize the last file.

How can I recreate this functionality of accepting multiple files at once in the viewer and process them one after the other (I would add pages to the current document.

thx in advance.

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Loïc
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Re: Need DropFile example for dragging multiple files at onc

Post by Loïc » Wed Jun 12, 2013 1:31 pm

Hello,

You have to catch the DragDrop event like any other user control. This is quite easy, here an example in vb.net:

Code: Select all

 Private Sub GdViewer1_DragEnter(sender As Object, e As DragEventArgs) Handles GdViewer1.DragEnter
        If e.Data.GetDataPresent(DataFormats.FileDrop) Then
            e.Effect = DragDropEffects.All
        End If
    End Sub

    Private Sub GdViewer1_DragDrop(sender As Object, e As DragEventArgs) Handles GdViewer1.DragDrop
        If e.Data.GetDataPresent(DataFormats.FileDrop) Then
            Dim files() As String = CType(e.Data.GetData(DataFormats.FileDrop), String())
            'do something with files() here
        End If
    End Sub
Kind regards,

Loïc

grama
Posts: 2
Joined: Thu Oct 18, 2012 9:09 pm

Re: Need DropFile example for dragging multiple files at onc

Post by grama » Wed Jun 19, 2013 3:24 pm

I'm using the INTEROP module with VB6, and there seems to be no DragEnter event available.

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