[求助]如何获取用insert插入的属性块的各属性值（块名已知）

wadeyu 发表于 2005-8-22 10:09:00

如何获取用insert插入的属性块的各属性值（块名已知）

风之助 发表于 2005-8-22 10:47:00

这是一本书中的例子，每一行代码的例子我还不太懂，你自己看看吧．其中包括插入块的代码．
void insrtBlk() {  char blkName;  AcDbDatabase *pCurDb;  AcDbBlockTable *pBlkTable;  AcDbBlockTableRecord *pBlkTableRecord;  AcDbBlockTableRecord *pBlkDefRecord;  AcDbBlockReference *pInsrtObj;  AcDbEntity *pEnt;  AcDbBlockTableRecordIterator *pIterator;  AcDbAttributeDefinition *pAttDef;  AcDbAttribute *pAtt;  AcDbObjectId blkId;  AcDbObjectId insrtId;
 char *pTagPrompt;
 AcGePoint3d insPt;  AcGePoint3d basePt;
 int retCode;
 retCode = acedGetString(0, "\nEnter Block Name: ", blkName);  if(retCode != RTNORM || blkName == '\0')  {   acutPrintf("\nInvalid block name.");   return;  }
 pCurDb = acdbHostApplicationServices()->workingDatabase();
 // Check to see if the block table  // has blkName
 pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);  if(!pBlkTable->has(blkName))  {   acutPrintf("\nBlock definition %s not found. ", blkName);   pBlkTable->close();   return;  }
 // Get the AcDbObjectId of the block  // definition.  pBlkTable->getAt(blkName, blkId);
 pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRecord, AcDb::kForWrite);  pBlkTable->close();    acedInitGet(RSG_NONULL, NULL);  acedGetPoint(NULL, "\nPick insertion point: ", asDblArray(insPt));
 pInsrtObj = new AcDbBlockReference(insPt, blkId);
 // Here is where you can set scale, rotation and other  // properties to the block entity. If you want to  // see the AcDbBlockReference class for more details.  pBlkTableRecord->appendAcDbEntity(insrtId, pInsrtObj);
  acdbOpenObject(pBlkDefRecord, blkId, AcDb::kForRead);  // Now check to see if the Block Definition  // has attributes. If it does we will add  // a Block Table Record Iterator to step through  // the entities and find the Attribute Definitions.
 if(pBlkDefRecord->hasAttributeDefinitions())  {   pBlkDefRecord->newIterator(pIterator);
  for(pIterator->start(); !pIterator->done(); pIterator->step())   {    pIterator->getEntity(pEnt, AcDb::kForRead);    // Check to see if the entity is an    // attribute definition.    pAttDef = AcDbAttributeDefinition::cast(pEnt);    if(pAttDef != NULL && !pAttDef->isConstant())    {     // If it is and its not constant     // create a new attribute     pAtt = new AcDbAttribute();     // setPropertiesFrom will copy     // Color, Layer, Linetype,Linetype scale and     // Visibility.     pAtt->setPropertiesFrom(pAttDef);     // setup more properties from the attribute     // definition     pAtt->setInvisible(pAttDef->isInvisible());     basePt = pAttDef->position();     basePt += pInsrtObj->position().asVector();     pAtt->setPosition(basePt);     pAtt->setHeight(pAttDef->height());     pAtt->setRotation(pAttDef->rotation());
    // Take note how we get the tag.     pTagPrompt = pAttDef->tag();     pAtt->setTag(pTagPrompt);     free(pTagPrompt);
    // Normally you would prompt the user     // and ask for input values.     pTagPrompt = pAttDef->prompt();     acutPrintf("%s%s", "\n", pTagPrompt);     free(pTagPrompt);         // The setFieldLength is not required     // even though it is listed in the     // documentation.     pAtt->setFieldLength(25);     // setTextString is the value the     // attribute receives which would     // normally be a user input value.     pAtt->setTextString("This is a test");
    pInsrtObj->appendAttribute(pAtt);     pAtt->close();    }    pEnt->close();   }// for   delete pIterator；
}// if has attribute definitions
  // Note that we close the Model Space  // block table record after we have added  // our attributes.  pBlkTableRecord->close();  pInsrtObj->close(); }

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[求助]如何获取用insert插入的属性块的各属性值（块名已知）