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vbaexcelcarriage-return

Avoid extra "carriage return" in Print statement with Visual Basic?

With Visual Basic, I'm confused with that the behavior of Print statement in that sometimes the following statement: would cause additional carriage return "^M" at the end of a line, but sometimes, it doesn't. I wondering why?

filePath = "d:\tmp\FAE-IMM-Report-2012-Week.org"
    If Dir(filePath) <> "" Then
        Kill filePath
    End If
    outFile = FreeFile()
    Open filePath For Output As outFile
    Print #outFile, "#+TITLE:     Weekly Report"

would produce

#+TITLE:     Weekly Report^M

while I wish without ^M:

#+TITLE:     Weekly Report

In one test program, almost the same code would produce no "^M".

Please help! Thanks a lot.

Upon further experiment, I found that the following suggestion using vbNewline and ";" at the end of print content, still does not solve my problem.

After careful isolation, I found the cause of the problem is an character that seems like a space, not exactly space, followed by newline and carriage return. Before printing the text containing the offending string, there was no carriage return, but once the offending line is printed, then every line including the previous line printed would have carriage return.

I'm not sure what the exact the offending string is as my skill of VBA is not yet too well.

Here is a copy of the offending text from a spreadsheet cell:

   "There is something invisible after this visible text 
After the invisible text, then there might be a carriage return $Chr(13) and/or newline"

I'm not sure if the paste to web browser would preserve the content, though. By pasting to emacs, I did not see carriage return, while emacs should display it, if there is one. So I guess that there is no carriage return in the offending string.

Below is the program demonstrate the problem:

    Sub DemoCarriageReturnWillAppear()
    Dim filePath As String
    Dim outFile
    Dim offendingText
    filePath = "d:\tmp\demoCarriageReturn.org"
    If Dir(filePath) <> "" Then
        Kill filePath
    End If
    outFile = FreeFile()
    Open filePath For Output As outFile
    Print #outFile, "#+AUTHOR:    Yu Shen" & vbNewLine;
    Close #outFile 'At this moment, there is no carriage return
    Open filePath For Append As outFile
    offendingText = ThisWorkbook.Worksheets("Sheet1").Range("A1")
    Print #outFile, offendingText & vbNewLine;
    Close #outFile 'Now, every line end has carriage return.
    'It must be caused by something offending at the above print out content.
End Sub

Here is the final result of the above procedure:

    #+AUTHOR:    Yu Shen^M

There is something invisible after this visible text 
After the invisible text, then there might be a carriage return $Chr(13) or newline^M

Note the above "^M" is added by me, as carriage return would not be visible in browser.

If you're interested, I can send you the excel file with the offending content.

I need your help on how to avoid those offending string, or the carriage returns. (I even try to do string Replace of the carriage return or new line, as I found that once I manually deleted whatever caused change to another line, the problem would be gone. But calling Replace to replace vbNewline, Chr$(13), or vbCrLf did not make any difference.

Thanks for your further help!

Yu

Solution

  • To help the other people in the future, here is an summary of my problem and the solution. The extra carriage return on each line even with semi-colon at the print statement end was actually caused by a string of space followed by newline (Chr$(A)) in one of the print statement, once such string is printed, then all previous and subsequent printed content would have an extra carriage return!

    It seems a bug on VBA 6 (with Excel 2007), a nasty one!

    My work-around was to replace the newline by a space.

    Thanks for Tony's repeated help enabling me finally nailed down the cause.

    Here is the code to demonstrate the problem:

    Sub DemoCarriageReturnWillAppearOnAllLines()
    Dim filePath As String
    Dim outFile
    Dim offendingText
    filePath = "d:\tmp\demoCarriageReturn.org"
    If Dir(filePath) <> "" Then
        Kill filePath
    End If
    outFile = FreeFile()
    Open filePath For Output As outFile
    Print #outFile, "#+AUTHOR:    Yu Shen" & vbNewLine;
    Close #outFile 'At this moment, there is no carriage return
    Open filePath For Append As outFile
    offendingText = " " & Chr$(10)
    Print #outFile, offendingText & vbNewLine;
    Close #outFile 'Now, every line end has carriage return.
    'It must be caused by the offending at the above print out content.
End Sub

    After the first "Close #outFile", here is the content of the file demoCarriageReturn.org:

    #+AUTHOR:    Yu Shen

    Note: with editor capable showing carriage return as visible ^M, there is no carriage return present.

    However, after the second "Close #outFile", here is the content of the same file with additional content:

    #+AUTHOR:    Yu Shen^M

^M

    Note: there are two carriage returns appear. They are not intended. Especially, to the first line, the print statement has been executed, and at the previous close statement, it was found without carriage return. (To illustrate carriage return, I have to typing ^M in web page here. But it's in the file of the print out.)

    This is why I think that it's a bug, as the carriage returns are not intended. It's undesirable surprise.

    The following code shows that if I filter out the linefeed character the problem would be gone. 

    Sub DemoCarriageReturnWillNotAppearAtAll()
    Dim filePath As String
    Dim outFile
    Dim offendingText
    filePath = "d:\tmp\demoCarriageReturn.org"
    If Dir(filePath) <> "" Then
        Kill filePath
    End If
    outFile = FreeFile()
    Open filePath For Output As outFile
    Print #outFile, "#+AUTHOR:    Yu Shen" & vbNewLine;
    Close #outFile 'At this moment, there is no carriage return
    Open filePath For Append As outFile
    offendingText = " " & Chr$(10)
    Print #outFile, Replace(offendingText, Chr$(10), "") & vbNewLine;
    Close #outFile 'Now, no more carriage return.
    'The only change is removing the linefeed character in the second print statement
End Sub

    After full execution of the above program, there is indeed no carriage return!

    #+AUTHOR:    Yu Shen

    This shows that string combination of space followed by linefeed caused the bug, and removing linefeed can avoid the bug.

    The following code further demonstrate that if there is no offending string, even without newline and semi-colon at the end of print statement, there would not be undesired carriage return!

    Sub DemoCarriageReturnWillNotAppearAtAllEvenWithoutNewLineFollowedBySemiColon()
    Dim filePath As String
    Dim outFile
    Dim offendingText
    filePath = "d:\tmp\demoCarriageReturn.org"
    If Dir(filePath) <> "" Then
        Kill filePath
    End If
    outFile = FreeFile()
    Open filePath For Output As outFile
    Print #outFile, "#+AUTHOR:    Yu Shen"
    Close #outFile 'At this moment, there is no carriage return
    Open filePath For Append As outFile
    offendingText = " " & Chr$(10)
    Print #outFile, Replace(offendingText, Chr$(10), "")
    Close #outFile 'Now, no more carriage return.
    'The real change is removing the linefeed character in the second print statement
End Sub

    Also in the output result:

    #+AUTHOR:    Yu Shen

    Still no the annoying carriage return!

    This shows that using newline followed by semi-colon at the end of print statement is not the solution to the problem of carriage return at every line! The real solution is to avoid any string of space followed by linefeed in the print out content.

    Yu