AcDbHatch修改后为什么不能更新显示[求助]
AcDbHatch修改后为什么不能更新：如下一段代码，获得AcDbHatch，修改他的填充图案和颜色，结果颜色修改正确，但图案修改后无论是用Redraw等命令都无法更新显示，只有再编辑后才更新显示。为什么？？？
void test()
{
AcDbHatch* pObj;
ads_name ent;
ads_point pt1;
acedEntSel("\nhacth:",ent,pt1);
AcDbObjectId objId;
Acad::ErrorStatus es;
acdbGetObjectId(objId,ent);
acdbOpenObject(pObj,objId,AcDb::kForWrite);
es = pObj->evaluateHatch();
es = pObj->setPattern(AcDbHatch::kPreDefined, "ANGLE");
es = pObj->setColorIndex(3);
es = pObj->downgradeOpen();///!!!!!!!!!!!!!!!!!!!!!!!
es = pObj->draw(); //更新实体
pObj->recordGraphicsModified(Adesk::kTrue);
pObj->close();
acedUpdateDisplay();
actrTransactionManager->flushGraphics();
return;
}
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