‎使用 ObjectARX 向块添加新属性‎

admin1

[code]void AddNewAtt()

{

    AcDbDatabase *pCurDb;

    AcDbBlockTable* pBlkTbl;

    AcDbBlockTableRecord* pBlkRec;

    AcDbObjectId attId;

    Acad::ErrorStatus es;



    AcDbAttributeDefinition* pAttDef;

   // location of the AttributeDefinition in the

   // block definition

    AcGePoint3d attLoc(1.2, -0.5, 0);



   // specify the text,tag and prompt

    ACHAR text[] = {L"NEW VALUE ADDED"};

    ACHAR tag[] = {L"MYTAG"};

    ACHAR prompt[] = {L"Enter a new value"};

     

    pCurDb =

       acdbHostApplicationServices()->workingDatabase();



    es =

       pCurDb->getBlockTable(pBlkTbl, AcDb::kForRead);



    if(!pBlkTbl->has(L"TEST"))

    {

        acutPrintf(L"\nBlock definition TEST does not

                    exist");

        pBlkTbl->close();

        return;

    }



    es = pBlkTbl->getAt(L"TEST", pBlkRec, AcDb::kForWrite);

    // create a AttributeDefinition

    pAttDef = new AcDbAttributeDefinition(attLoc, text,

                                           tag, prompt);



    // append the AttributeDefinition to the definition

    es = pBlkRec->appendAcDbEntity(attId, pAttDef);



    pAttDef->close();

    pBlkRec->close();

    pBlkTbl->close();

}



[/code]