yang686526

usage of funtion acdbgetsummaryinfo
usage of funtion acdbgetsummaryinfo
i want to find the summary informatin in a opened dwg file through my program,such as the command "dwgprops".
the program is as follow:
acdocmanager->lockdocument( acdocmanager->curdocument(), acap::kwrite, null, null,true) ;
acdbdatabasesummaryinfo* pinfo;
acad::errorstatus es =acdbgetsummaryinfo(acdbhostapplicationservices()->workingdatabase(), pinfo);
if (es == acad::eok){
char* author;
pinfo->getauthor(author) ;
acutprintf(" author is %s",author);
}
but the strange thing is: when i open a dwg file that the property of "author" is with value,the program works normally.if
i open a dwg file that the property of "author" is without value(that mean i don't add value to property of "author" manually though the dialog),then prompt the error as follow:
unhandled access violation reading 0x0000 exception at ....
and then autocad clashed. i know that the question is about memory and maybe something should be initialized.
it is important to me! i am waiting online.thanks a lot!
this is wrong forum for asking questions about programming in autocad :-)
you do not check status returned by getauthor() and your pointer may be not assigned any value (contains garbage - non-initialized memory).
you should check status returned by the function or at least initialize the pointer to zero before calling the function.
sergey slezkin