yang686526

[求助][arx]来看看代码,运行两次cad就崩溃
[求助][arx]来看看代码,运行两次cad就崩溃
照搬照抄了一个addline的小程序,加载后在cad中使用该命令绘制line后无显示,但命令行提示success,第二次使用后cad崩溃,请教一下是怎么回事情,谢谢了,代码如下:
// ex03.cpp : 定义 dll 应用程序的入口点。
//
#include "stdafx.h"
#include <adslib.h>
#include <rxdlinkr.h>
#include <aced.h>
#include <dbents.h>
#include <geassign.h>
#include <dbsymtb.h>
#include <dbapserv.h>
//-----------------------------------------------------------------------------
//----- dll entry point
acad::errorstatus
posttodatabase(acdbentity* pent,acdbobjectid& idobj)
{
acad::errorstatus es;
acdbblocktable* pblocktable;
acdbblocktablerecord* pspacerecord;
if(acdbhostapplicationservices()->workingdatabase()==null)
return acad::enodatabase;
if ((es=acdbhostapplicationservices()->workingdatabase()->getblocktable(pblocktable,acdb::kforread))==acad::eok)
{
if((es==pblocktable->getat(acdb_model_space,pspacerecord,acdb::kforwrite))==acad::eok)
{
if((es=pspacerecord->appendacdbentity(idobj,pent))==acad::eok)
pent->close();
pspacerecord->close();
}
pblocktable->close();
}
return es;
}
//-----------------------------------------------------------------
acad::errorstatus newline()
{
ads_point pt1,pt2;
int retval;
try
{
if((retval=acedgetpoint(null, "\nselect lower left:",pt1))!=rtnorm)
throw retval;
if((retval=acedgetpoint(pt1,"\nselect upper right:",pt2))!=rtnorm)
throw retval;
}
catch (int e)
{
if(e==rtcan)
return acad::euserbreak ;
if(e==rterror)
return acad::einvalidinput ;
}
acdbline* pline =new acdbline(aspnt3d(pt1),aspnt3d(pt2));
if(!pline)
{
acedalert("not enough memory to create a line!");
return acad::eoutofmemory ;
}
acdbobjectid id;
return posttodatabase(pline,id);
}
//------------------------------------------------------------------------
void addlinecommand()
{
if(newline()==acad::eok)
acutprintf("success\n");
else
acutprintf("failed\n");
}
//-------------------------------------------------------------------------
extern "c" acrx::appretcode
acrxentrypoint(acrx::appmsgcode msg, void*pkt)
{
switch(msg)
{
case acrx::kinitappmsg:
acrxdynamiclinker->unlockapplication(pkt);
acrxdynamiclinker->registerappmdiaware(pkt);
//注册命令
acedregcmds->addcommand("exam03","addline","addline",acrx_cmd_modal,addlinecommand);
break;
case acrx::kunloadappmsg:
acedregcmds->removegroup("exam03");
break;
}
return acrx::kretok;
}
//------------------------------------------------------------------------
bool apientry dllmain( handle hmodule,
dword ul_reason_for_call,
lpvoid lpreserved
)
{
return true;
}
if((es==pblocktable->getat(acdb_model_space,pspacerecord,acdb::kforwrite))==acad::eok)
这句有问题
if((es=pblocktable->getat(acdb_model_space,pspacerecord,acdb::kforwrite))==acad::eok)
多了一个=号,语法上检查不出来,谢谢了!