FIX: ListView & TreeView Not Visible if DragMode is Automatic

• Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 32-bit only, for Windows, version 4.0

SYMPTOMS

If the DragMode property of the ListView or TreeView controls is set to Automatic, items added to the controls are not visible. This behavior occurs even if the EnsureVisible method is invoked for either the nodes or listitems.

RESOLUTION

When adding new nodes or listitems to the controls, and invoking the EnsureVisible method, set the DragMode property to 0 - Manual. It can be set back to Automatic at the end of the routines to add new items.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Basic 5.0.

MORE INFORMATION

Steps to Reproduce Problem

1. Start a new project in Visual Basic. Form1 is created by default.



2. Place a ListView and TreeView control on Form1. In the Load event for Form1, place the following code:

   
         Private Sub Form_Load()
            Dim x As Node, y As ListItem
            Set x = TreeView1.Nodes.Add(, , , "eat more")
            Set y = ListView1.ListItems.Add(, , "jello")
            x.EnsureVisible
            y.EnsureVisible
         End Sub 




3. Ensure that the DragMode property of both controls is set to 1-Automatic.



4. Run the project by pressing F5. Note that the item added to both controls shows only partially or not at all.

   Private Sub Form_Load()
      Dim x As Node, y As ListItem
      ListView1.DragMode = 0
      TreeView1.DragMode = 0
      Set x = TreeView1.Nodes.Add(, , , "eat more")
      Set y = ListView1.ListItems.Add(, , "jello")
      x.EnsureVisible
      y.EnsureVisible
      ListView1.DragMode = 1
      TreeView1.DragMode = 1
   End Sub 

Additional query words: kbVBp400bug kbVBp500fix kbVBp kbControl

Keywords : kbVBp kbVBp400bug kbVBp500fix kbGrpVB kbControl
Version :
Platform : WINDOWS
Issue type : kbbug