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Dynamic blocks - Attributes to custom properties and viceversa


Gotrekk

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Hi there,

 

I have many different blocks with different attributes and custom properties (rotation angle, position 1 X, position 1 Y, and so on).

All of them have a perfect correspondence between attributes names and custom properties names.

 

For example, if i have a block with custom properties "rotation_head" and "position_head" i will have two attributes called "rotation_head" and "position_head".

 

I'd need a lisp with two functions cycling through all the selected different blocks; one of the function would:

- for each selected block, read the attributes and set the custom properties

while the other would:

- for each selected block, read the custom properties and set the attributes.

 

Do you think something like this would be possible?

 

The reason behind this kind of request is because i need to import and export shapefiles to autocad map and i need to set blocks custom properties using shapefiles table.a

 

Thanks in advance for any ideas/tips

Regards

GTK

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slowly... slowly... getting there, using Mac Lee function i got to this point:

 

(defun c:testx1 ( / ent )
 
 (if (setq ent (car (entsel "\nSelect Attributed Block: ")))
   (princ
	(LM:setdynpropvalue
		(vlax-ename->vla-object ent) 
		"value_a"   ; custom_property
		(atof 
			(LM:GetAttributeValue
				(vlax-ename->vla-object ent) 
				"value_a"
			)
		)
	)
   )		
 )
 (princ)
)

 

this way i'm able to set custom property "value_a" with value of attribute "value_a" on the selected block! :D

 

next step is... how do i select many different blocks and run the same function on them?

 

i tried:

(defun c:a1(/ ss i obj j k mt)
	(if (setq ss (ssget "_:L" '((0 . "INSERT") (66 . 1))))
		(repeat (setq i (sslength ss))
			(setq obj (vlax-ename->vla-object (ssname ss (setq i (1- i)))))
			(princ(LM:GetAttributeValue(obj) "Matricola"))
		)
  )
     (princ)
)(vl-load-com)

but fails ... any hints?

Edited by Gotrekk
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I haven't looked into your code too much. The first that would come to mind is how you are counting your ss index.

 

maybe something like this...

 

(setq cnt 0)
(repeat (sslength ss)
 (setq obj (vlax-ename->vla-object (ssname ss cnt)))
 (princ (LM:GetAttributeValue obj "Matricola"))
 (setq cnt (+ cnt 1))
)

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I haven't looked into your code too much. The first that would come to mind is how you are counting your ss index.

 

maybe something like this...

 

(setq cnt 0)
(repeat (sslength ss)
 (setq obj (vlax-ename->vla-object (ssname ss cnt)))
 (princ (LM:GetAttributeValue obj "Matricola"))
 (setq cnt (+ cnt 1))
)

 

i tried your solution, i don't get error but nothing get printed... i even tried

(princ cnt) inside the repeat... but no output at all

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It looks like you are using the Vanilla AutoLISP version of my Get Attributes function, therefore, you should supply this function with a block reference entity name as opposed to a vla-object.

 

Here is a simple example:

(defun c:a1 ( / ent idx sel val )
   (if (setq sel (ssget "_:L" '((0 . "INSERT") (66 . 1))))
       (repeat (setq idx (sslength sel))
           (setq ent (ssname sel (setq idx (1- idx))))
           (if (setq val (LM:getattributevalue ent "Matricola"))
               (princ (strcat "\n" val))
               (princ (strcat "\nAttribute tag \"Matricola\" not found in block " (cdr (assoc 2 (entget ent)))))
           )
       )
   )
   (princ)
)

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It looks like you are using the Vanilla AutoLISP version of my Get Attributes function, therefore, you should supply this function with a block reference entity name as opposed to a vla-object.

 

Here is a simple example:

(defun c:a1 ( / ent idx sel val )
   (if (setq sel (ssget "_:L" '((0 . "INSERT") (66 . 1))))
       (repeat (setq idx (sslength sel))
           (setq ent (ssname sel (setq idx (1- idx))))
           (if (setq val (LM:getattributevalue ent "Matricola"))
               (princ (strcat "\n" val))
               (princ (strcat "\nAttribute tag \"Matricola\" not found in block " (cdr (assoc 2 (entget ent)))))
           )
       )
   )
   (princ)
)

 

first of all, thank for your help!

using your function i still get:

; error: bad argument type: VLA-OBJECT

Command:

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What version of my LM:getattributevalue function are you using?

(defun LM:GetAttributeValue ( blk tag )
 ;; © Lee Mac 2010
 (vl-some
   (function
     (lambda ( attrib )
       (if (eq tag (vla-get-Tagstring attrib))
         (vla-get-TextString attrib)
       )
     )
   )
   (vlax-invoke blk 'GetAttributes)

 )
)

ok.. got it... i switched to:

;; Get Attribute Value  -  Lee Mac
;; Returns the value held by the specified tag within the supplied block, if present.
;; blk - [vla] VLA Block Reference Object
;; tag - [str] Attribute TagString
;; Returns: [str] Attribute value, else nil if tag is not found.

(defun LM:getattributevalue ( blk tag / enx )
   (if (= "ATTRIB" (cdr (assoc 0 (setq enx (entget (setq blk (entnext blk)))))))
       (if (= (strcase tag) (strcase (cdr (assoc 2 enx))))
           (cdr (assoc 1 enx))
           (LM:getattributevalue blk tag)
       )
   )
)

and it's now working :)

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