Listbox Selected Items Into Textbox Not Working

Dec 22, 2010

my vb.net will not use listbox1.selecteditems it always comes up with a blue line underneath even though when i search online everyone is using this. my goal is to get the selected items and list them in a textbox

Protected Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim li As ListItem
For Each li In ListBox1.Items
If li.Selected Then
TextBox1.Text &= li.Text & vbCrLf
End If
UpdatePanel2.Update()
Next
End Sub
End Class

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