Find and Replace string in a .txt file with VBscript - replace

Question

I am trying to figure out how to use vbscript to:
1 - open a .csv file as a .txt file
2 - search for a certain string of text that is located randomly throughout the text
3 - replace that string with a different string.
I have found an article that helped me learn how to replace an entire line in a .txt document, but so far have had no luck finding anything about replacing just certain characters within the line.
Thanks!
Here is the code I am using currently:
Const ForReading = 1
Const ForWriting = 2
'Setting up our objects and focusing on the text file.
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFile = objFSO.OpenTextFile("C:\Users\Documents\Script Practice\TextFiles-2-4-15-Folder\ReadandWrite\Textlook.txt", ForReading)
Do Until objFile.AtEndOfStream
strLine = objFile.ReadLine
If strLine = "Myer" Then
strLine = "Mike"
End If
strContents = strContents & strLine & vbCrLf
Loop
objFile.Close
Set objFile = objFSO.OpenTextFile("C:\Users\Documents\Script Practice\TextFiles-2-4-15-Folder\ReadandWrite\Textlook.txt", ForWriting)
objFile.Write(strContents)
objFile.Close
The text file it references says:
Ken Myer
Fabrikam
Pilar Ackerman
Wingtip Toys
Jeff Hay
Fabrikam
Ellen Adams
Northwind Traders
Myer
(End of text file). So essentially, I have gotten the code to successfully change the "Myer" that is on its own line to "Mike". What I am having a hard time with is changing the "Myer" in the first line to "Mike". Hopefully this helps clarify things a bit...I'm extremely new at this so not sure of the language I should be using to describe the problem.

Answer 1

Use Replace on the file's content obtained by .ReadAll() and .Write the result back. In code:
Option Explicit
Dim goFS : Set goFS = Createobject("Scripting.FileSystemObject")
Dim goWAU : Set goWAU = WScript.Arguments.Unnamed
WScript.Quit main()
Function main()
main = 1 ' assume error
If 3 = goWAU.Count Then
If goFS.FileExists(goWAU(0)) Then
Dim s : s = goFS.OpenTextFile(goWAU(0)).ReadAll()
If 0 < Instr(s, goWAU(1)) Then
goFS.CreateTextFile(goWAU(0)).Write Replace(s, goWAU(1), goWAU(2))
WScript.Echo "done"
main = 0
Else
WScript.Echo goWAU(1), "not found"
End If
Else
WScript.Echo goWAU(0), "does not exist"
End If
Else
WScript.Echo "need 3 args: fspec, find, replacement"
End If
End Function
output:
copy con 28350055.csv
1,2,3
4,5,6
^Z
cscript 28350055.vbs 28350055.csv 5 4711
done
type 28350055.csv
1,2,3
4,4711,6
cscript 28350055.vbs 28350055.csv 5 4711
5 not found
cscript 28350055.vbs 28350055.cs 5 4711
28350055.cs does not exist
Use that demo to determine what is needed to solve your real world problem.

Answer 2

I'm extremly new too, so i didnt get what the other answer do in the code, but i figured out in the last answer about "Replace" and use in your code for do what you need, and the result is this:
Const ForReading = 1
Const ForWriting = 2
'Setting up our objects and focusing on the text file.
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFile = objFSO.OpenTextFile("C:\Users\Documents\Script Practice\TextFiles-2-4-15-Folder\ReadandWrite\Textlook.txt", ForReading)
Do Until objFile.AtEndOfStream
strLine = objFile.ReadLine
strLine = Replace(strLine,"Myer","Mike")
' If strLine = "Myer" Then
' strLine = "Mike"
' End If
strContents = strContents & strLine & vbCrLf
Loop
objFile.Close
Set objFile = objFSO.OpenTextFile("F:\BIBLIOTECAS\Archivos\TEST.txt", ForWriting)
objFile.Write(strContents)
objFile.Close