Windows Forms FAQ resources

20. Windows Forms ListBox

Place a ListBox on your form, set its AllowDrop property and handle both DragEnter and DragDrop as below.

private void listBox1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)

{

if (e.Data.GetDataPresent(DataFormats.FileDrop))

e.Effect = DragDropEffects.All;

else

e.Effect = DragDropEffects.None;

}

private void listBox1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)

{

string[] files = (string[])e.Data.GetData("FileDrop", false);

foreach (string s in files)

{

//just filename

listBox1.Items.Add(s.Substring(1 + s.LastIndexOf(@"\")));

//or fullpathname

// listBox1.Items.Add(s);

}

Here are some VB snippets.

Private Sub listBox1_DragEnter(sender As Object, e As System.Windows.Forms.DragEventArgs)

If e.Data.GetDataPresent(DataFormats.FileDrop) Then

e.Effect = DragDropEffects.All

Else

e.Effect = DragDropEffects.None

End If

End Sub 'listBox1_DragEnter

Private Sub listBox1_DragDrop(sender As Object, e As System.Windows.Forms.DragEventArgs)

Dim files As String() = CType(e.Data.GetData("FileDrop", False), String())

Dim s As String

For Each s In files

'just filename

listBox1.Items.Add(s.Substring(1 + s.LastIndexOf("\")))

or fullpathname

' listBox1.Items.Add(s)

End Sub 'listBox1_DragDrop