Finding DXF Codes

[Anonymous]

How do I find DXF codes for various AutoCAD and Civil 3D entities? is there a command or Utility I can use to drill down into the various entities and find these values? I need this information for building SelectionFilters but can't find a good source.

Thanks,
Josh

Civil 3D 2009 SP1
VS2005 SP1
Win XP Pro SP2

[AdammReilly]

Attached is a small lisp program, which I modified, and was originally in the LISP Tutorial of the help documentation with AutoCAD.
PrintDXF is the command, run it, select any entity, and it will print the dxf data to the command line. My modification will also print the XData attached to the entity.

[AdammReilly]

Couldn't add file. heres the code:

(defun C:PRINTDXF (/ entl ct xct dct)
(setq entl (entget (cdar (entget (car (entsel "Pick an entity to examine ")))) '("*"))
ct 0)

(princ "\nEntget of selected entity:")
(repeat (if (= (car (last entl)) -3)
(- (length entl) 1)
(length entl)
);_if
(print (nth ct entl))
(setq ct (1+ ct))
);_repeat
(if (= (car (last entl)) -3)
(progn
(print "(-3")
(setq xct 1
dct 0)
(repeat (1- (length (last entl)))
(repeat (length (nth xct (last entl)))
(if (atom (nth dct (nth xct (last entl))))
(princ "\n ")
(princ "\n ")
);_if
(prin1 (nth dct (nth xct (last entl))))
(setq dct (1+ dct))
);_repeat
(setq xct (1+ xct)
dct 0)
);_while
(print ")")
);_progn
);_if
(princ)
);_defun c:PRINTDXF

[Jimcao07]

Can someone please let me know the command to read/write entity property via dxf index number like this.

[Jimcao07]

I mean in VB.net

[BKSpurgeon]

Is this what you are looking for (please review attached pdf): DXF references list (full).

hope this helps.

regards,

Ben

[Jimcao07]

Hello BK Thank you. I stored the reference and it's helpful. I'm using vb.net dealing with a customized object (impentity), which stored text associate with dxf code 1, and I can not found the stored text exposed in my vb.net environment via acadobject or others. I found it's so easy to access it in LISP like (print (nth ct entl)), but I don't know how to access the value associated with certain dxf code number in my vb.net program. Thank you.

[dgorsman]

Thats dependant on how the information is stored.  For example, XRecords use one set of DXF codes (which match standard AutoCAD DXF codes) while XDATA uses its own set of DXF codes.  The actual meaning of the data in both cases is left up to the user to decide its context ie. a coordinate value could be a start point, or end point, or even a vector.

[Jimcao07]

Hi Dgors

I tried dbobject.xdata(retrieved all registered application), and I can get some dxf code value associated with 1000~1005 or so. My issue is like someone said reverse engineering on customized object (IMPEntity). That object stored data associated with dxfcode 1. Now I'm using resultbuffer / ivoke to have a LISP program run and get the value. If vb.net has the same ability like (print (nth ct entl)), as posted by Adam above (I tried Adam's LISP program, it's just brilliant well), I shouldn't have trouble struggling with LISP.   Thank you!

[s_abeed]

Hi 

You able to find some solution or using lisp command. I am searching for the solution as well and so far I have the lisp solution as well and not something in .NET

Regards

Salman

[daniel_cadext]

maybe use MgdDbg, should have a DXF filer

https://github.com/ADN-DevTech/MgdDbg

[s_abeed]

Thanks Daniel for sharing the ArxDbg .NET version and I am able to give it a try. I was not aware of this tool so good to know and I have this code that will be handy in future.

However it doesn't have the DXF option as available in the regular ARXDBG comes with SDK.