【转帖】[求助][arx]请问一下关于屏幕刷新？
 

[求助][arx]请问一下关于屏幕刷新？
[求助][arx]请问一下关于屏幕刷新？
readfromfile()
{
acdbdatabase *pdb=new acdbdatabase();
acad::errorstatus es=pdb->readdwgfile ("e:\\3.dwg");
if(es!=acad::eok)
{
acutprintf("fail load dwg file.code:1");
return;
}
acdbblocktable *pblocktable;
es=pdb->getblocktable (pblocktable,acdb::kforwrite );
if(es!=acad::eok)
{
acutprintf("fail load acdbblocktable.code:2");
return;
}
acdbblocktablerecord *pblocktablerecord;

acdbobjectid id;
es=pblocktable->getat ("10",pblocktablerecord,acdb::kforread );
if(es!=acad::eok)
{
acutprintf("fail found special block!.code:3");
return;
}
else
{
acutprintf("sucessfully find the block!\n");
acdbblocktablerecorditerator* pbtriterator;
es=pblocktablerecord->newiterator (pbtriterator);
if(es!=acad::eok )
{
acutprintf("fail to construct blocktablerecord iterator.code:4");
return;
}
else
{
int no=0;
for(pbtriterator->start ();!pbtriterator->done ();pbtriterator->step ())
{
acdbentity *pent;
int readorwrite=1;
es=pbtriterator->getentity(pent,acdb::kforwrite );
if(es!=acad::eok)
{
acutprintf("fail to find the entity in no:%i,.code:5",no);
return;
}
else
{
if(readorwrite==1)
{
acutprintf("and it is opened for write!\n");
// 如果当前实体是以acdb::kforwrite方式打开的,则要这样做
pent->downgradeopen();
pent->draw();
}
no++;
}//if
}//for
acutprintf("the record contain %i blocks!",no);
// 刷新显示屏幕
actrtransactionmanager->flushgraphics();
acedupdatedisplay();
}
}

pblocktable->close ();
pblocktablerecord->close ();
delete pdb;
return;
}
请问我的这段代码为什么刷新不了显示屏啊？
谢谢！