Every now and then you need to fill a TreeView control with some random data, for example when you want to test a routine and you don’t want to write a lot of code just for this secondary task. Here is a recursive routine that does the work for you:
' MaxChildren is the max number of child Nodes at each level' MaxLevel is the deepest nesting level you want to createSub AddRandomNodes(TV As TreeView, Node As Node, MaxChildren As Integer, _ MaxLevel As Integer) Dim i As Integer Dim child As Node ' Add a number of child Nodes less or equal to MaxChildren For i = 1 To CInt(Rnd * MaxChildren) Set child = TV.Nodes.Add(Node.index, tvwChild, , _ "Node #" & (TV.Nodes.Count + 1)) ' for each child Node, if MaxLevel is greater than 0 ' randomly add a set of child nodes If CInt(Rnd * MaxLevel) Then AddRandomNodes TV, child, MaxChildren, MaxLevel - 1 End If NextEnd SubYou can use the above routine as follows:
TreeView1.Nodes.Add , , , "Root"' max 3 levels, max 5 nodes for each levelAddRandomNodes TreeView1, TreeView1.Nodes(1), 5, 3
