DragDrop file onto your form

[Valleysboy1978]

I have been working on an app that formats an XML file into a TreeView and thought this bit of the code might come in handy for you.
This part enables you to drop an external file from your PC onto a TreeView (or any other control for that matter) where you can then do what you want with it. In my case just output the location.

Here you are:

1.
Change the AllowDrop property of your control to True

2.
Select the little lightning bolt in the Properties window and double-click the DragDrop and DragEnter events to create them in your code. Or just create them manually of course

3.
In the DragEnter event put this code:

e.Effect = e.AllowedEffect;

 if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
   e.Effect = DragDropEffects.Move;
}
else 
{ 
   e.Effect = DragDropEffects.None; 
}

Obviously you can extras to the allowed DataFormats such as Text, RTF etc.

4.
In the DragDrop event add this code:

if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
    string[] fileNames = (string[])e.Data.GetData(DataFormats.FileDrop);

    foreach (string fileName in fileNames)
    {
       TreeView1.Items.Add(fileName);
    }
}

Hey presto you got a tree view that you can drag files directly onto!
Obviously if you change this to a Text you can drag text directly onto it

Enjoy!