by Levi (2 Submissions)
Category: Files/File Controls/Input/Output
Compatability: Visual Basic 3.0
Difficulty: Beginner
Date Added: Wed 3rd February 2021
Rating: 
(3 Votes)
Exports a TreeView control (including ALL it's children) into a graphical representation with plain text.
Inputs
A tree control!
Assumes
You'll never find anything
'easier. just paste the code into your
'program and call the first function
'and it will return the output of
'everything in your TreeView control
'Ex:Text1.Text = exportTree(MyTreeView)
Code Returns
A string with the formatted
'text to look like the tree control
VBcoders'sample output:
'
'+- 07/21/01 - 11:57:09 PM
'| \- Shell_TrayWnd - ""
'| |- Button - ""
'| |- TrayNotifyWnd - ""
'| | \- TrayClockWClass - ""
'| |- MSTaskSwWClass - ""
'| \- SysTabControl32 - ""
'**************************************
Function exportTree(tree As TreeView) As String
Dim txtlen As Long, txtbuffer As String, index As Long
Dim vlines() As Boolean, ret as String
ret = chr(13) & chr(10)
ReDim Preserve vlines(0)
vlines(0) = True
numchildren = 0
exportTree = "+- " & Format(Date, "mm/dd/yy") & " - " & Format(Time, "hh:mm:ss AM/PM") & " - "
Dim depth As Integer, start As Long
index = Tree.Nodes.Item(1).FirstSibling.index
Do
On Error Resume Next
Err.Clear
index2 = Tree.Nodes.Item(index).Next.index
If Err.Number = 91 Then
On Error GoTo 0
vlines(0) = False
exportTree = exportTree & ret & "| \- " & Tree.Nodes.Item(index).Text _
& getchildren(index, 0, vlines)
Exit Do
Else
On Error GoTo 0
exportTree = exportTree & ret & "| |- " & Tree.Nodes.Item(index).Text _
& getchildren(index, 0, vlines)
index = Tree.Nodes.Item(index).Next.index
End If
Loop
exportTree = exportTree & ret & "|" & ret & "|" & ret & "|" & ret & "|"
End Function
'the following function calls itself over and over for each child and returns with
'ALL of the children and their children, etc. of the current item in the tree
Function getchildren(ByVal index As Long, ByVal childcnt As Integer, ByRef vlines() As Boolean, Optional data As String = "") As String
Dim children As Integer
childcnt = childcnt + 1
ReDim Preserve vlines(childcnt)
children = Tree.Nodes.Item(index).children
If children > 1 Then
vlines(childcnt) = True
data = data & ret & childspaces(childcnt, vlines) & "|- " & Tree.Nodes.Item(index).Child
Call getchildren(Tree.Nodes.Item(index).Child.index, childcnt, vlines, data)
index = Tree.Nodes.Item(index).Child.index
For i% = 3 To children
data = data & ret & childspaces(childcnt, vlines) & "|- " & Tree.Nodes.Item(index).Next
Call getchildren(Tree.Nodes.Item(index).Next.index, childcnt, vlines, data)
index = Tree.Nodes.Item(index).Next.index
Next i%
vlines(childcnt) = False
data = data & ret & childspaces(childcnt, vlines) & "\- " & Tree.Nodes.Item(index).Next
Call getchildren(Tree.Nodes.Item(index).Next.index, childcnt, vlines, data)
ElseIf children = 1 Then
vlines(childcnt) = False
data = data & ret & childspaces(childcnt, vlines) & "\- " & Tree.Nodes.Item(index).Child
Call getchildren(Tree.Nodes.Item(index).Child.index, childcnt, vlines, data)
End If
getchildren = data
End Function
'This function is used to insert the correct amount of space from the edge
'to make all the children line up properly
Function childspaces(childcnt As Integer, vlines() As Boolean) As String
childspaces$ = "| "
For i% = 1 To childcnt
childspaces$ = childspaces$ & IIf(vlines(i% - 1), "| ", " ")
Next i%
End Function
