查找删除的实体

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查找删除的实体



问题：



如何强制AcDbBlockTableRecordIterator不跳过已擦除的实体？



解答：



为避免跳过已擦除的实体，必须为最后一个参数指定false

在AcDbBlockTableRecord类的newIterator（）方法中

可选，并设置为true（即跳过已擦除的实体）。



下面的示例代码将列出在模型空间中删除的所有实体。

注释包含在需要指定正确参数的位置

遍历删除的实体。



void fTest()
{
AcDbBlockTable *pBT;
AcDbBlockTableRecord *pBTR;
AcDbBlockTableRecordIterator *pIter;
acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBT,AcDb::kForRead);
pBT->getAt(ACDB_MODEL_SPACE,pBTR,AcDb::kForWrite);
pBT->close();
//the last parameter should be false to get the erased entities
pBTR->newIterator(pIter,true,false);
pBTR->close();
int mCtr = 0;
AcDbEntity *pEnt;
Acad::ErrorStatus es;
while(!pIter->done())
{
//if you specify true for last parameter then you will not get eWasErased notification.
//but this also means you will not be able to open the erased object
es = pIter->getEntity(pEnt,AcDb::kForWrite,false);
if (es == Acad::eWasErased)
{
mCtr++;
acutPrintf("\neWasErased, Entity number : %d",mCtr);
}
else
{
pEnt->close();
}
//the last parameter should be false to get the erased entities
pIter->step(true,false);
}
acutPrintf("\nTotal number of erased entities: %i",mCtr);
delete pIter;
}