C# Drag and Drop fail

[mediaguycouk]

Hi all, I'm doing really badly on my first try at a drag and drop. I'm trying to have a listBox that can have a file dragged onto it from Windows Explorer

From the very simple example here - http://support.microsoft.com/kb/307966 I have

Set AllowDrop on the list to TRUE
Set the event DragDrop
Set the event DragEnter

I have the following code

Code: C# [Select]

1. private void listFilesToConvert_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
2.         {
3.             // DEBUG
4.             MessageBox.Show("DragEnter");
5.  
6.             if (e.Data.GetDataPresent(DataFormats.FileDrop))
7.                 e.Effect = DragDropEffects.All;
8.             else
9.                 e.Effect = DragDropEffects.None;
10.         }
11.  
12.         private void listFilesToConvert_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
13.         {
14.             // DEBUG
15.             MessageBox.Show("DragDrop");
16.            
17.             string[] s = (string[])e.Data.GetData(DataFormats.FileDrop);
18.             int i;
19.             for (i = 0; i < s.Length; i++)
20.                 listFilesToConvert.Items.Add(s[i]);
21.  
22.         }

I can't say I understand it all, but it looks very similar to other code on the net. It's probably something simple but I can't work it out.

Neither debug message boxes fire.

Cheers

Graham R

[fenixproductions]

2mediaguycouk
Works perfect here. Well... "almost perfect". Messago box has to be clicked and when I do so, dragged files are lost.

Maybe the reason is related to this somehow?

Use: Debug.WriteLine() for debugging and check will there be anything in Output panel.

PS. Check is it working inside your Visual Studio:
http://fenixproducti...pl/tmp/test_drop.rar

[mediaguycouk]

I shall thank Nutcase - http://channel9.msdn...agging-and-Dropping/

Visual Studio 2005 on Vista needs to run as administrator, explorer runs as a normal user. Vista doesn't allow programs using different privileges to interact.

So my code has worked for 3 hours

(And thanks for the debug command, I didn't know it existed)