Ignoring the CAsE in RichTextBoxFinds

[Lloyd001]

Hello Devs,

I am new to VB.net, and to this forum, so please be patient if I make any errors.

I have a problem with my code below. The RichTextBoxFinds.None doesn't seem to work.

I have a richtextbox (RichTxt_CV) and a textbox (txtFind_CV). I want the richtext box, to highlight any word in the txtfind_CV textbox, in Red.
This is almost working, but no matter what I try, I just can't get it to igore the CaSingG of the txtfind_Cv textbox. I think I have tried everything. Any suggestions?

    Private Sub HighlightCVText() 'This highlights the searched for word in the CV box
        If txtFind_CV.Text = "" Then GoTo endme
        Dim textEnd As Integer = RichTxt_CV.TextLength
        Dim Textindex As Integer = 0
        Dim lstIndex As Integer = RichTxt_CV.Text.LastIndexOf(txtFind_CV.Text)

        While Textindex < lstIndex
            RichTxt_CV.Find(txtFind_CV.Text, Textindex, textEnd, RichTextBoxFinds.None)
            RichTxt_CV.SelectionColor = Color.Red
            Dim bfont As New Font(RichTxt_CV.Font, FontStyle.Bold)
            RichTxt_CV.SelectionFont = bfont
            Textindex = RichTxt_CV.Text.IndexOf(txtFind_CV.Text, Textindex) + 1
        End While
endme:
    End Sub

Thanks so much in advance for your help.

[dbasnett]

        Dim x, y As Integer
        y = 0
        Do
            y = RichTextBox2.Text.IndexOf(TextBox1.Text, y, StringComparison.CurrentCultureIgnoreCase)
            If y <> -1 Then
                RichTextBox2.Select(y, TextBox1.Text.Length)
                RichTextBox2.SelectionColor = Color.Red
                y = y + TextBox1.Text.Length
                If y + TextBox1.Text.Length >= RichTextBox2.TextLength Then Exit Do
            Else
                Exit Do
            End If
        Loop

[Lloyd001]

Thanks for your reply dbasnett

As I mentioned, I am a newbie to .Net, so I am probably not seeing something obvious, but I tried your code and it just loops continually.

I notice you don't use the x integer ... could it be something to do with this?

Thanks again for your help though.

[wild_bill]

This solution uses regex. Surrounding the word you're search for with \b, tells the parser to match whole words only.

    'Imports System.Text.RegularExpressions
    Private Sub HighlightCVText(ByVal word As String)
        Dim wordLength As Integer = word.Length
        Dim excapedWord As String = Regex.Escape(word)
        Dim rx As New Regex("\b" & excapedWord & "\b", RegexOptions.IgnoreCase)
        Dim bFont As New Font(RichTxt_CV.Font, FontStyle.Bold)
        For Each m As Match In rx.Matches(RichTxt_CV.Text)
            Dim textIndex As Integer = m.Index
            RichTxt_CV.Select(textIndex, wordLength)
            RichTxt_CV.SelectionColor = Color.Red
            RichTxt_CV.SelectionFont = bFont
        Next
        RichTxt_CV.SelectionLength = 0
    End Sub

[Lloyd001]

Thanks so much Wild Bill - you are a genius.

So sorry that I am only replying now. Was busy with other parts of the project and didn't get a chance to check if anyone had replied.
This works perfectly.

For others using this code, don't forget to

dim word as string = txtFind_CV.Text

Again, Wild Bill, thanks so much.