How t o Delete XData from an Object?

[Anonymous]

How can I delete, remove or erase XData from an Object?

[Anonymous]

This is what technical document of Object ARX saying

To delete extended data
1. Call acdbEntGet() to retrieve the entity.
2. Add to the end of the list returned by acdbEntGet() a resbuf with a restype of -3.
3. Add to the end of the list another resbuf with a restype of 1001 and a resval.rstring set to .

Thanks !
KIMI

[Anonymous · Accepted solution]

Hi, mbasa!
Try this sample:
[code]
=========Beginning of the citation==============
static void RemoveXdata(void)
{
ads_name en;
ads_point pt;
Acad::ErrorStatus es;
if (acedEntSel("\nSelect entity: ", en, pt) != RTNORM)
return;

AcDbObjectId objId; acdbGetObjectId(objId, en);

AcDbObjectPointer pEnt(objId,AcDb::kForWrite);
if ((es = pEnt.openStatus()) != Acad::eOk) {
acutPrintf("\nError open entity: %s", acadErrorStatusText(es));
return;
}
resbuf *xdata = NULL;
while ((xdata = pEnt->xData(NULL)) != NULL) {
resbuf *xdata_next = xdata->rbnext;
xdata->rbnext = NULL;
pEnt->setXData(xdata);
xdata->rbnext = xdata_next;
acutRelRb(xdata);
}
}
=========The end of the citation================
[/code]

Best Regards,
Alexander Rivilis.

[Anonymous]

Thanks!!

This resbuf struct is very hard to understand at the beginning, but it is very simple though:)

[Anonymous]

Of course using lisp it's much simpler, see this thread:
http://discussion.autodesk.com/thread.jspa?threadID=12329