windows - Explorer freezes when dragging folder until VB event is finished

Question

I'm making a program in VB.NET, which does some file processing on a folder that is dragged into the form control. When the folder is dropped, all I really need is the path to it, and then explorer can go about its day. But the event that the drop calls (Me.DragDrop) freezes the explorer instance that the folder was dragged from until my work is done. Here's what I've got:

Public Sub FileEnter(sender As Object, e As DragEventArgs) Handles Me.DragEnter
    If e.Data.GetDataPresent(DataFormats.FileDrop) Then e.Effect = DragDropEffects.Copy
End Sub

Public Sub FileDrop(sender As Object, e As DragEventArgs) Handles Me.DragDrop
    dropPath = CType(e.Data.GetData(DataFormats.FileDrop), String()).First
    Dim files = Directory.GetFiles(dropPath, "*", SearchOption.AllDirectories)
    . . .
End Sub

once I have dropPath, I don't need the drop event anymore, but it holds on.

question from:https://stackoverflow.com/questions/65894568/explorer-freezes-when-dragging-folder-until-vb-event-is-finished

Answer 1

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