Treeview Searches...

hneal

Does anyone know how to search a treeview to search for portion of text on a node? And, if the text occurs more than once, how would I 'continue' the search?

Thanks in advance.

BattleGuard

Does "find/replace" work?

BattleGuard

: Does anyone know how to search a treeview to search for portion of text on a node? And, if the text occurs more than once, how would I 'continue' the search?
:
: Thanks in advance.
:

Chris__B

Hi,

I'm pasting a suggestion that takes user input and searches a treeview from top to bottom including child nodes, grandchild nodes, etc.
It involves using Regular Expressions. I've tried the following code.

[code]
Imports System.Text.RegularExpressions
[/code]

and also

[code]
Private Sub btnFind_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFind.Click
'Only Search for Matches if something is entered
If txt.Text <> String.Empty Then
Find()
End If
End Sub
Private Sub Find()
Dim oNode As TreeNode
'For each top level node
For Each oNode In tv.Nodes
If MatchNode(oNode) Then
'On First Match Exit
Exit Sub
End If
Next
'If you get to here, no match has been found
MessageBox.Show("No Match")
End Sub
Private Function MatchNode(ByVal oNode As TreeNode) As Boolean
Dim oRegex As Regex
Dim oChild As TreeNode
'Match Any Characters
'Followed by what has been type in txt
'Followed by any characters
If oRegex.IsMatch(oNode.Text, ".*" & txt.Text & ".*", RegexOptions.IgnoreCase) Then
tv.SelectedNode = oNode
tv.Select() 'Select the Node that matches
Return True
End If
'Check child nodes
For Each oChild In oNode.Nodes
If MatchNode(oChild) Then
Return True
End If
Next
End Function
[/code]

Right now it finds the first match with no Find Next options. I'm sure you could find a way to keep track of where the first match occurs (using the Index of the oNode variable perhaps) and then have a FindNext method that accomplishes the same task but from a different starting point.

Hope that helps,
Cheers,

Chris

: Does anyone know how to search a treeview to search for portion of text on a node? And, if the text occurs more than once, how would I 'continue' the search?
:
: Thanks in advance.
: