Why not accept treeview selectednode based ontextbox.text ?

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When I try to set focus TreeViewNode based on TextBox.Text (with dont care uppercase, lowercase) then no result.

For Excample Node Tag is "C:\7143\Baltek")

if I enter "C:\7143\baltek") or "C:\7143\BalteK") no result, because of Upper LowerCase typing

how can I adjust to find not with any type textbox.text.

What I have tried:

VB

Private Sub Button12_Click(sender As Object, e As EventArgs) Handles Button12.Click
        
        'Expand(TextBox3.Text) '("C:\7143\Baltek")
        gotNode = False
        For Each n As TreeNode In Me.TreeView1.Nodes
            If Not gotNode Then
                
                selectTreeNode(n, TextBox3.Text) ' "C:\7143\Baltek")

                
            End If
          
        Next

    End Sub

Posted 21-Mar-19 21:39pm

Nicomendox

Updated 21-Mar-19 22:14pm

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Maciej Los 22-Mar-19 3:55am

Show us your selectTreeNode method.

1 solution

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Maciej Los · Answer 1 · 2019-03-21T22:15:00

Solution 1

I'd suggest to start with this: Comparing Strings in .NET | Microsoft Docs[^]

If you want to ignore case, check this: String.Equals Method (System) | Microsoft Docs[^]

VB.NET

Dim node2find = Me.TreeView1.Nodes.Cast(Of TreeNode)() _
	.Where(Function(n) n.Text.Equals(TextBox3.Text, StringComparison.InvariantCultureIgnoreCase)) _
	.ToList()

Above code will return a list of nodes which text equals to TextBox3.Text ignoring case.

[EDIT]
In case you want to compare a part of text, you need to use of of the following string functions:
StartsWith
Contains
EndsWith
Please, follow the first link (on the top of my answer).

Posted 21-Mar-19 22:15pm

Maciej Los

Updated 22-Mar-19 4:55am

v4

Comments

Nicomendox 22-Mar-19 10:41am

I am sorry but I couldnt work with this code. but same problem here

Private Sub Button13_Click(sender As Object, e As EventArgs) Handles Button13.Click
For Each n As TreeNode In Me.TreeView1.Nodes(0).Nodes
If n.Text = "Users" Then
TreeView1.SelectedNode = n
TreeView1.Select()
TreeView1.SelectedNode.Expand()

End If
Next
End Sub

When Type "Users" 'With Capital "U"
TreeView.SelectedNode is Focus On "C:\Users"
But When I type "users" with "u"
this time result is nothing.

is the problem about TreeView or about the Code ?

Maciej Los 22-Mar-19 10:51am

You've stated that:
Hide Copy Code

SelectredNode is "C:\Users"

If n.Text = "Users" Then

and my question is:
Does "C:\Users" is equal to "Users"?

See updated answer.

Nicomendox 22-Mar-19 14:17pm

Absolutely "C:\Users" is same with "Users"

"C:\Users" is Tag and "Users" is Node under the Treeview.

My problem is if I type "C:\users" instade of "C:\Users" code dosent work. because not all letters match with the search string.

Under TreeView, Node Name is "Users" not "users. Problem is "u" and "U" difrencence.

Maciej Los 22-Mar-19 15:42pm

Absolutely not! Check on this:

Dim s1 As String = "C:\Users"
Dim s2 As String = "users"

Console.WriteLine("Does '{0}' is equal to '{1}' = {2}", s1, s2, s1=s2)

And this:

Console.WriteLine("Does '{0}' constains '{1}' = {2}", s1, s2, s1.ToLower().Contains(s2.ToLower()))

;)