How to detect if Treeview has TreeNodes or not (VB.Net/C#)

Question

How can I know if a TreeView has TreeNodes, regardless of whether they are parent or child nodes? I just want to avoid duplication. The pseudo-code looks like:

If TreeView1 has TreeNodes Then   
   'Remove old ones and create another   
   'Or Exit to skep creation of new ones  
Else  
   'Create TreeNodes  
End Sub

oppassum · Accepted Answer · 2015-07-07 20:02:34Z

2

You can check TreeView1.Nodes.Count or you can simply call TreeView1.Nodes.Clear() to ensure it's always clear before you add new ones

Update for more complete answer:

If TreeView1.Nodes.Count = 0 Then   
   'Remove old ones and create another   
   'Or Exit to skep creation of new ones  
Else  
   'Create TreeNodes  
End Sub

edited Jul 7, 2015 at 20:02

answered Jul 7, 2015 at 19:57

oppassum

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