Function to count number of lines in a text file

Question

Need a function that will accept a filename as parameter and then return the number of lines in that file.

Should be take under 30 seconds to get the count of a 10 m

Answer 1

You could try some variation on this

cnt = 0
Set fso = CreateObject("Scripting.FileSystemObject")
Set theFile = fso.OpenTextFile(filespec, ForReading, False)
Do While theFile.AtEndOfStream <> True
   theFile.SkipLine
   c = c + 1
Loop
theFile.Close
WScript.Echo c,"lines"

Answer 2

txt = "c:\YourTxtFile.txt"
j = 0
Dim read
Open txt For Input As #1
  Do While Not EOF(1)
    Input #1, read
    j = j + 1
  Loop
Close #1

If it adds an empty last line the result is (j - 1).

It works fine for one column in the txt file.

Answer 3

If somebody still looking for faster way, here is the code:

Set fso = CreateObject("Scripting.FileSystemObject") 
Set theFile = fso.OpenTextFile("C:\textfile.txt", 8, True) 
WScript.Echo theFile.Line 
Set Fso = Nothing

Of course, the processing time depend very much of the file size, not only of the lines number. Compared with the RegEx method TextStream.Line property is at least 3 times quicker.

Answer 4

How to count all lines in the notepad Answers: => Below is the code -

Set t1=createObject("Scripting.FileSystemObject")
Set t2=t1.openTextFile ("C:\temp\temp1\temp2_VBSCode.txt",1)
Do Until t2.AtEndOfStream
strlinenumber = t2.Line
strLine = t2.Readline
Loop
msgbox strlinenumber
t2.Close

Answer 5

The only alternative I see is to read the lines one by one (EDIT: or even just skip them one by one) instead of reading the whole file at once. Unfortunately I can't test which is faster right now. I imagine skipping is quicker.

Dim objFSO, txsInput, strTemp, arrLines
Const ForReading = 1
Set objFSO = CreateObject("Scripting.FileSystemObject")

strTextFile = "sample.txt"
txsInput = objFSO.OpenTextFile(strTextFile, ForReading)

'Skip lines one by one 
Do While txsInput.AtEndOfStream <> True
    txsInput.SkipLine ' or strTemp = txsInput.ReadLine
Loop

wscript.echo txsInput.Line-1 ' Returns the number of lines

'Cleanup
Set objFSO = Nothing

Incidentally, I took the liberty of removing some of your 'comments. In terms of good practice, they were superfluous and didn't really add any explanatory value, especially when they basically repeated the method names themselves, e.g.

'Create a File System Object
... CreateObject("Scripting.FileSystemObject")

Answer 6

Too large files...
The following is the fastest-effeciently way I know of:

Dim oFso, oReg, sData, lCount
Const ForReading = 1, sPath = "C:\file.txt"
Set oReg = New RegExp
Set oFso = CreateObject("Scripting.FileSystemObject")
sData = oFso.OpenTextFile(sPath, ForReading).ReadAll
With oReg
    .Global = True
    .Pattern = "\r\n" 'vbCrLf
    '.Pattern = "\n" ' vbLf, Unix style line-endings
    lCount = .Execute(sData).Count + 1
End With
WScript.Echo lCount
Set oFso = Nothing
Set oReg = Nothing