Author: (ZJH135 Zhang Jun-hong)
This example implements double-click node, popup dialog and displays node information
First add some data on TreeView1, the code is as follows:
SUB EXAMPLE ()
DIM N As New Treenode, I as Integer, J AS Integer
For i = 0 TO 3
WITH N.NODES.ADD ((i * 15) .tostring & "-" & ((i 1) * 15 - 1) .tostring)
For j = 0 to 14
.NODES.ADD ((J i * 15) .tostring)
NEXT
End with
NEXT
Dim Nodetoadd as Treenode
For i = 1 to 24
Nodetoadd = n.clone
Nodetoadd.text = i.totring
TreeView1.nodes.Add (NodeToadd)
NEXT
End Sub
Add the following code in the TreeView1_Click event:
Dim n as treenode = ctype (sender, windows.forms.treeview) .selectedNode
'// If the tree node is not 0, the prompt information is displayed.
IF n.GetnodeCount (false) = 0 THEN
'// Text characters of the current node
DIM S as string = n.text
'// If the character length is 1, then add 0
If s.ley = 1 THEN
S = s.insert (0, "0") '// Specify location inserted into characters
END IF
'// Character plus the current node character in a tree node
S = n.parent.text & ":" & s
'// Of course, you can also display the characters of the higher level node
'// code changes to: s = n.parent.parent.text & ":" & S
Messagebox.show ("The character you choose is:" & s)
END IF
