Read and write into a file using VBScript

Question

How can we read and write some string into a text file using VBScript? I mean I have a text file which is already present so when I use this code below:-

Set         


        

Answer 1

You could also read the entire file in, and store it in an array

Set filestreamIN = CreateObject("Scripting.FileSystemObject").OpenTextFile("C:\Test.txt",1)
file = Split(filestreamIN.ReadAll(), vbCrLf)
filestreamIN.Close()
Set filestreamIN = Nothing

Manipulate the array in any way you choose, and then write the array back to the file.

Set filestreamOUT = CreateObject("Scripting.FileSystemObject").OpenTextFile("C:\Test.txt",2,true)

for i = LBound(file) to UBound(file)
    filestreamOUT.WriteLine(file(i))
Next

filestreamOUT.Close()
Set filestreamOUT = Nothing 

Answer 2

Regardless of what you're trying to do there should be no need to read to and write to a file at the same time. It would also use more memory which should always be avoided. I'd suggest reading the entire file using the .ReadAll method and then close it and do whatever you need to do with the data (assuming you read the contents into a variable) and then do a write to the same file and overwrite the file. If you're concerned with having something go wrong when over-writing the current file you could always try to write it to a different file and throw an error if that doesn't work before trying to over-write the original.

Answer 3

Find more about the FileSystemObject object at http://msdn.microsoft.com/en-us/library/aa242706(v=vs.60).aspx. For good VBScript, I recommend:

• Option Explicit to help detect typos in variables.
• Function and Sub to improve readilbity and reuse
• Const so that well known constants are given names

Here's some code to read and write text to a text file:

Option Explicit

Const fsoForReading = 1
Const fsoForWriting = 2

Function LoadStringFromFile(filename)
    Dim fso, f
    Set fso = CreateObject("Scripting.FileSystemObject")
    Set f = fso.OpenTextFile(filename, fsoForReading)
    LoadStringFromFile = f.ReadAll
    f.Close
End Function

Sub SaveStringToFile(filename, text)
    Dim fso, f
    Set fso = CreateObject("Scripting.FileSystemObject")
    Set f = fso.OpenTextFile(filename, fsoForWriting)
    f.Write text
    f.Close
End Sub

SaveStringToFile "f.txt", "Hello World" & vbCrLf
MsgBox LoadStringFromFile("f.txt")

Answer 4

You could put it in an Excel sheet, idk if it'll be worth it for you if its needed for other things but storing info in excel sheets is a lot nicer because you can easily read and write at the same time with the

 'this gives you an excel app
 oExcel = CreateObject("Excel.Application")

 'this opens a work book of your choice, just set "Target" to a filepath
 oBook = oExcel.Workbooks.Open(Target)

 'how to read
 set readVar = oExcel.Cell(1,1).value
 'how to write
 oExcel.Cell(1,2).value = writeVar

 'Saves & Closes Book then ends excel
 oBook.Save
 oBook.Close
 oExcel.Quit

sorry if this answer isnt helpful, first time writing an answer and just thought this might be a nicer way for you

Answer 5

You can create a temp file, then rename it back to original file:

Set objFS = CreateObject("Scripting.FileSystemObject")
strFile = "c:\test\file.txt"
strTemp = "c:\test\temp.txt"
Set objFile = objFS.GetFile(strFile)
Set objOutFile = objFS.CreateTextFile(strTemp,True)
Set ts = objFile.OpenAsTextStream(1,-2)
Do Until ts.AtEndOfStream
    strLine = ts.ReadLine
    ' do something with strLine 
    objOutFile.Write(strLine)
Loop
objOutFile.Close
ts.Close
objFS.DeleteFile(strFile)
objFS.MoveFile strTemp,strFile 

Usage is almost the same using OpenTextFile:

Set objFS = CreateObject("Scripting.FileSystemObject")
strFile = "c:\test\file.txt"
strTemp = "c:\test\temp.txt"
Set objFile = objFS.OpenTextFile(strFile)
Set objOutFile = objFS.CreateTextFile(strTemp,True)    
Do Until objFile.AtEndOfStream
    strLine = objFile.ReadLine
    ' do something with strLine 
    objOutFile.Write(strLine & "kndfffffff")
Loop
objOutFile.Close
objFile.Close
objFS.DeleteFile(strFile)
objFS.MoveFile strTemp,strFile 

Answer 6

Don't think so...you can only use openTextFile for reading (1), writing (2), or appending (8). Reference here.

If you were using VB6 instead of VBScript, you could do:

Open "Filename" [For Mode] [AccessRestriction] [LockType] As #FileNumber

Using the Random mode. For example:

Open "C:\New\maddy.txt" For Random As #1