Attributes

Anyone know how I can extract a series of attributes from a block and have
them updated?

 

You need to describe your goals in greater detail.

 

Hi,

Yes. At a minimum everybody who has read the help files.

--

Regards


Laurie Comerford
www.cadapps.com.au

 

I have a title block that I created a routine to automatically set the date,
file name, and project attributes. But if that title block is ever moved to
a different path and I want to update the print date, it has to be done
manually. I am trying to write a routine to update the date, project path,
and project while keeping the routine as simple as possible.

I need to know if attibutes are set like a variable or something in a
drawing, I want to change them by changing that setting.

Thanks.

Brian

 

Pre-AutoCAD 2005, use RTEXT.
AutoCAD 2005 use RTEXT or Fields.

 

I don't have RTEXT. I am using LDD3.

 

As you may already know:
Attributes are entities within the drawing associated with blocks
that contain editable text values. Using Legacy lisp / DXF
techniques, the attributes are entities that follow the associated
insert. They can be changed by using the entnext, entget, subst,
and entmod functions.

Using vlisp techniques, the attributes are accessible by using
the getattributes method related to the AcDbBlockReferernce.

Do you need instructions for vlisp or legacy lisp (dxf) techniques
for changing them?

Since you know how to write some code, show us what you've
tried so far.

Regards,
Doug

 

I can't get past setting up the variables

(defun c:sheetup ()
(prompt "\nSelect Title Block and Press Enter Please")
(setq sheet (entsel))
(setq scle (getvar "dimscale"))
(setq dnme (getvar "DWGNAME"))
(setq dpth (getvar "DWGPREFIX"))
(setq fnme (strcat dpth dnme))
(setq acadObj (vlax-get-acad-object)aecApp (vla-getinterfaceobject acadObj
"Aecc.Application") aecProj (vlax-get aecApp "ActiveProject")aecProjName
(vlax-get aecProj "name"))
(setq date (itoa (fix (getvar "cdate"))))(setq date1(strcat(substr date 5
2)"/"(substr date 7 2)"/"(substr date 1 4)))

and I don't know what to do next to modify the block. I want to simply run
through the attedit command, but I am not sure how its command line
structure works. It asks "Edit Attribute one at a time? [Yes/No] <Y>: " and
on and on and on. I am not sure how it works.

I just need to know if there is a quicker method than having to figure out
exactly how editing attributes through the command line works.

 

If you want to have the attributes update automatically, then
attedit is out of the question. Instead you must do the changes
using entmod or by using vlisp to change the attributes themselves.
You can skip the aec stuff if you are just working with blocks
and attributes. If you have ADT, however, I'm curious. Why
not use attributes with fields? (Below code examples are not tested)

After you pick the block with entsel, the legacy method is
to
(setq attrib (entnext (car (entsel))) ;assuming that you really have a block with
attributes

That is easy enough to check.

(setq attinfo (entget attrib)) ; should give you an idea of what to change.

An automated program should be looking for attributes with specific
tag names (like DATE and SHTNO and DWG).

To change the attribute

(entmod (subst (cons # newval) (assoc # attinfo) attinfo)

Vlisp techniques are a lot different.

 

THANKS A MILL! THAT HELPS A BUNCH!!!!