X记录示例

以下 ObjectARX 示例由两个函数组成：and。第一个函数将新的 xrecord 添加到字典中，将该字典添加到命名对象字典中，然后将数据添加到 xrecord。该函数打开一个 xrecord，获取其数据列表，并发送要打印的列表。有关完整程序，请参阅 ObjectARX示例\数据库\xrecord_dg目录。createXrecord()listXrecord()listXrecord()

void
createXrecord()
{
    AcDbDictionary *pNamedobj, *pDict;
    acdbHostApplicationServices()->workingDatabase()
        ->getNamedObjectsDictionary(pNamedobj, AcDb::kForWrite);
    // Check to see if the dictionary we want to create is
    // already present. If not, then create it and add
    // it to the named object dictionary.
    // 
    if (pNamedobj->getAt("ASDK_DICT", (AcDbObject*&) pDict,
        AcDb::kForWrite) == Acad::eKeyNotFound)
    {
        pDict = new AcDbDictionary;
        AcDbObjectId DictId;
        pNamedobj->setAt("ASDK_DICT", pDict, DictId);
    }
    pNamedobj->close();
    // Add a new xrecord to the ASDK_DICT dictionary.
    //
    AcDbXrecord *pXrec = new AcDbXrecord;
    AcDbObjectId xrecObjId;
    pDict->setAt("XREC1", pXrec, xrecObjId);
    pDict->close();
    // Create a resbuf list to add to the xrecord.
    //
    struct resbuf *pHead;
    ads_point testpt = {1.0, 2.0, 0.0};
    pHead = acutBuildList(AcDb::kDxfText,
        "This is a test Xrecord list",
        AcDb::kDxfXCoord, testpt,
        AcDb::kDxfReal, 3.14159,
        AcDb::kDxfAngle, 3.14159,
        AcDb::kDxfColor, 1,
        AcDb::kDxfInt16, 180,
        0);
    // Add the data list to the xrecord.  Notice that this
    // member function takes a reference to resbuf, NOT a
    // pointer to resbuf, so you must dereference the
    // pointer before sending it.
    // 
    pXrec->setFromRbChain(*pHead);
    acutRelRb(pHead);
    pXrec->close();
}
// Gets the xrecord associated with the key XREC1 and
// lists out its contents by passing the resbuf list to the
// function printList.
// 
void
listXrecord()
{
    AcDbDictionary *pNamedobj;
    acdbHostApplicationServices()->workingDatabase()
        ->getNamedObjectsDictionary(pNamedobj, AcDb::kForRead);
    // Get the dictionary object associated with the key ASDK_DICT.
    //
    AcDbDictionary *pDict;
    pNamedobj->getAt("ASDK_DICT", (AcDbObject*&)pDict,
        AcDb::kForRead);
    pNamedobj->close();
    // Get the xrecord associated with the key XREC1.
    //
    AcDbXrecord *pXrec;
    pDict->getAt("XREC1", (AcDbObject*&) pXrec,
        AcDb::kForRead);
    pDict->close();
    struct resbuf *pRbList;
    pXrec->rbChain(&pRbList);
    pXrec->close();
    printList(pRbList);
  acutRelRb(pRbList);
}