RegEx.Replace isn't working

Hot Topic

list of html files from local directory as list of url's in webbrowser control (WinForms)
Read/Write of HKLM under Power User
Office addin using addin designer
Browse Network place only, howto?
My Image2Hex Convertor
Windows service
Problem returning from dialog box subroutine
Question on message box
Problems with streamread
VB and Excel

Visual Basic

SLOW saving record
USB driveletter
How do I add a flash movie/game into the form?
Converting KeyCodes to String. Using SELECT CASE with KeyValue or KeyCode. NumPad. Key detect or detection. Number, letter.
Web History Access
Notepad program wants to write Fonts and Colors in XML.
VB.net DLL handling
Error while using Installutil for installing windows service application.
Read data from XML file to combobox
Me.MouseButtons = mousebuttons.left Error( Read Only), But Is it????

RegEx.Replace isn't working

I have this:
Imports System.Text.RegularExpressions.Regex

Select Case True
Case CBool(GetAsyncKeyState(116))
With Options.Items
If .Item(0).ToString.Contains("OFF") Then
MsgBox("check")
Replace(.Item(0).ToString, "OFF", "ON")
Else
MsgBox("nocheck")
Replace(.Item(0).ToString, "ON", "OFF")
End If
End With
End Select

Options is a listbox.
Now, when I press F5 the msgbox says 'check' but the string does not change "OFF" to "ON".
Am I missing something



Answer this question

RegEx.Replace isn't working

  • Joe Kehnast

    Hi,

    I tested this code, which worked perfectly as desired.

    Imports System.Text.RegularExpressions.Regex

    Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    Dim tmpString As String

    Dim tmpString_changed As String

    tmpString = TextBox1.Text

    tmpString_changed = Replace(tmpString, "ON", "OFF")

    MsgBox(tmpString_changed )

    End Sub

    End Class

    I believe you need to capture the return string for this purpose.

     

    Bye,

    Sugan

  • xplosiv_1

    Well, you're certainly using the wrong tool - the string class has a replace method.

    Have you set a breakpoint to make sure this is being called at all



  • Cmeyla

    That is what was wrong. I wasn't catching the returned string. I knew it had to be simple. thank you.

    Another thing, what event would I use to catch when the text changes in the listbox. I tried textchanged but it didn't work.


  • Rick Stephens

    Yes - you are right. Strings are immutable so methods that change them always return a string. Even if you use string.replace ( and you probably should ), this will continue to be the case.



  • Ranier

    If i am right, I think what you where trying for is "SelectedIndexChanged".

    Try this event.



  • RegEx.Replace isn't working
Answer this question