CAD Forum - tips, tricks, discussion and utilities for AutoCAD, Inventor, Revit and other Autodesk products []
Cesky English Deutsch
 Visitors: 3712 

CAD tip CAD tip # 7812:

Question CAD 
 %  platform  category 
Q - question

How to write line-feed to a text file in AutoLISP.

A - answer The AutoLISP functions (write-line) and (write-char) automatically add the full CR/LF sequence (carriage return, line feed) when trying to output just the LF (line-feed, chr 10).

There is a trick of forcing AutoCAD to output really just the line-feed. Use the (write-char) function and add 256 to the character code. So instead of (write-char 10 f), use (write-char 266 f). An example:

(setq f (open "C:/TEMP/TESTFILE.TXT" "w"))
(write-char 266 f)
(close f)
writes a file testfile.txt containing just the LF character.
100% *  CAD 
23.2.2011    6910×  
Comments   Tell a friend
applies to: AutoCAD 2011 ·

See also:
Tip 5271:Overview of your complex linetypes.
Tip 2063:How to open a drawing with write-protection (R/O)?

Back   All CAD Tips All CAD tips&tricks

My DesignCenter palette no longer displays the DC Online tab. « | » Nature doesn't use right angles.

Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above). You may also add a link to your web - like this "fan" link: CAD Forum - tips, utilities, blocks for Autodesk products
CAD:    OS:    Categ: 
Text:  FAQ glossary   

Increase your productivity with our set of BIM add-on functions for Autodesk Revit
CADstudio Revit Tools More info

Please use these tips at your own risk.
CAD Studio (Xanadu) is not responsible for possible problems that may occur as a result of using any of these tips.