Solved

Windows Batch File - Read CSV

Posted on 2016-11-14
9
57 Views
Last Modified: 2016-11-14
Hi there,

I need to read a csv file where the data fields may sometimes contain the delimiter character.

@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET Line1=first,a,"black, white",1
SET Line2=second,b,green,2
SET Line3=third,,red,3

FOR /F "tokens=2 delims==" %%a in ('SET Line') DO (
	FOR /F "Delims=" %%b in ("%%~a") DO (
		SET Line=%%b
		SET Line=^"!Line:,=^",^"!^"
		FOR /F "tokens=1-4 delims=," %%A in ("!Line!") DO ECHO %%~D
	)
)
	
ECHO.
PAUSE
EXIT /b

Open in new window


Expected output:
1
2
3

Thanks for your help,
Rene
0
Comment
Question by:ReneGe
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 4
9 Comments
 
LVL 84

Expert Comment

by:oBdA
ID: 41886857
So you want the last element per line?
@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET Line1=first,a,"black, white",1
SET Line2=second,b,green,2
SET Line3=third,,red,3

FOR /F "tokens=2 delims==" %%a in ('SET Line') DO (
	for %%b in (%%a) do set LastElement=%%b
	echo !LastElement!
)
	
ECHO.
PAUSE
EXIT /b

Open in new window

0
 
LVL 10

Author Comment

by:ReneGe
ID: 41886880
Hi oBdA,

Thanks for your prompt reply.

My real challange here is that I have strings in my csv data files that are the same as the delimiter.

So my data sample should have been the following

@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET Line1=first,a,"black, white",1,one
SET Line2=second,b,green,2,two
SET Line3=third,,red,3,tree

FOR /F "tokens=2 delims==" %%a in ('SET Line') DO (
	FOR /F "Delims=" %%b in ("%%~a") DO (
		SET Line=%%b
		SET Line=^"!Line:,=^",^"!^"
		FOR /F "tokens=1-5 delims=," %%A in ("!Line!") DO ECHO %%~D
	)
)
	
ECHO.
PAUSE
EXIT /b

Open in new window


Where the expected output would still be:
1
2
3

Thanks and cheers
0
 
LVL 84

Accepted Solution

by:
oBdA earned 500 total points
ID: 41886917
Then try this:
@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET Line1=first,a,"black, white",1,one
SET Line2=second,b,green,"2",two
SET Line3=third,,red,3,tree
set Col=4
FOR /F "tokens=2 delims==" %%a in ('SET Line') DO (
	set Line=,%%a
	set Line=!Line:,,=,"",!
	set /a i = 0
	for %%b in (!Line!) do (
		set /a i += 1
		if !i!==%Col% set Element=%%~b
	)
	echo !Element!
)
	
ECHO.
PAUSE
EXIT /b

Open in new window

0
Webinar: Aligning, Automating, Winning

Join Dan Russo, Senior Manager of Operations Intelligence, for an in-depth discussion on how Dealertrack, leading provider of integrated digital solutions for the automotive industry, transformed their DevOps processes to increase collaboration and move with greater velocity.

 
LVL 10

Author Comment

by:ReneGe
ID: 41886921
More it goes, more I realize that my example script is probably to simplistic for my real application.

My real data is not a consecutive number, so here is another example.

@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET Line1=first,a,"black, white",a,one
SET Line2=second,b,green,big,two
SET Line3=third,,red,apple,tree

FOR /F "tokens=2 delims==" %%a in ('SET Line') DO (
	FOR /F "Delims=" %%b in ("%%~a") DO (
		SET Line=%%b
		SET Line=^"!Line:,=^",^"!^"
		FOR /F "tokens=1-5 delims=," %%A in ("!Line!") DO ECHO %%~D
	)
)
	
ECHO.
PAUSE
EXIT /b

Open in new window


The output here would be:
a
big
apple

Cheers :)
0
 
LVL 84

Expert Comment

by:oBdA
ID: 41886936
Yes? That's what the script above will create.
D:\Temp>type ReadCsvWithCommaData.cmd | findstr /r /c:"SET Line[0-9]"&echo.&ReadCsvWithCommaData.cmd
SET Line1=first,a,"black, white",a,one
SET Line2=,b,green,big,two
SET Line3=third,,red,apple,tree

a
big
apple

Open in new window

0
 
LVL 10

Author Comment

by:ReneGe
ID: 41886964
Interresting
for %%b in (!Line!) do echo %%b
So it will consider whatever is between "" as an item.  So if it contains a comma, the comma will be considered as being part of that data, rather than a new data field.  Correct?
0
 
LVL 10

Author Comment

by:ReneGe
ID: 41886971
Cool!!!!!
I just learned something new :)

@echo off
for %%a in (a,b,"c,d",e) do echo %%a
pause

Open in new window

0
 
LVL 84

Expert Comment

by:oBdA
ID: 41886977
Yes; the normal "for" loop will use space or comma as delims if a list is inside the brackets, and respect delims enclosed in quotes.
0
 
LVL 10

Author Closing Comment

by:ReneGe
ID: 41886978
Thanks mate :)
You rock as always!!
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

AutoHotkey is an excellent, free, open source programming/scripting language for Windows. It started out as a keyboard/mouse macros product, but has expanded into a robust language. This article provides an introduction to it, with links to addition…
Use this article to create a batch file to backup a Microsoft SQL Server database to a Windows folder.  The folder can be on the local hard drive or on a network share.  This batch file will query the SQL server to get the current date & time and wi…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

756 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question