[求助]数据字典问题, 出异常!!请指点谢谢!!!

leidiang · 发表于 2005-3-1 16:58:00

我得到数据字典类时,出现异常,不知道为什么,谢谢,下面是代码.
   AcDbDictionary *pNamedobj;
   acdbHostApplicationServices()->workingDatabase()
   ->getNamedObjectsDictionary(pNamedobj, AcDb::kForRead);
   // Get a pointer to the ASDK_DICT dictionary.
   //
   AcDbDictionary *pDict;
   pNamedobj->getAt("SCALE_DICT", (AcDbObject*&)pDict,
   AcDb::kForRead);
   pNamedobj->close();
   // Get an iterator for the ASDK_DICT dictionary.
   //
   if (pDict == NULL) {//pDict不为空
   ASSERT(0);
   return;
   }
   AcDbDictionaryIterator* pDictIter= pDict->newIterator();//在这句后出现异常
   BSCScaleClass *pMyCl;

   for (; !pDictIter->done(); pDictIter->next()) {
   // Get the current record, open it for read, and
   // print its data.
   //
   pDictIter->getObject((AcDbObject*&)pMyCl,
   AcDb::kForRead);
   pMyCl->gethScale(hs);
pMyCl->getvScale(vs);
   pMyCl->close();
   acutPrintf("\nintval is:    %d", hs);
   }
   delete pDictIter;
   pDict->close();

中国虫 · 发表于 2005-3-2 08:48:00

getAt和getObject要判断返回值，尤其是第一个getAt直接影响下边的程序运行，除非你的：
AcDbDictionary *pDict;
改为
AcDbDictionary *pDict=NULL;
当然是最好直接判断返回值是否为Acad::eOk，仔细看看联机帮助吧

leidiang · 发表于 2005-3-2 15:57:00

我把程序又改了一下，可还是有一些问题，版主再看一看给点意见！！谢谢
   AcDbDictionary *pNamedobj;
   acdbHostApplicationServices()->workingDatabase()
   ->getNamedObjectsDictionary(pNamedobj, AcDb::kForRead);
   AcDbDictionary *pDict;
if (pNamedobj->getAt("SCALE_DICT", (AcDbObject*&) pDict,
   AcDb::kForRead) == Acad::eOk)//程序运行通过，证明得到
   {
AcDbDictionaryIterator* pDictIter= pDict->newIterator();
BSCScaleClass *pMyCl;
if (pDictIter!= NULL) {
for (; !pDictIter->done(); pDictIter->next()) {//程序在这一行不进入循环，但里面的我看了有数据，至少有一个
// Get the current record, open it for read, and
// print its data.
//
if (pDictIter->getObject((AcDbObject*&)pMyCl,
AcDb::kForRead)==Acad::eOk){
pMyCl->gethScale(hs);
pMyCl->getvScale(vs);
pMyCl->close();
acutPrintf("\nintval is:    %d", hs);
}
}
}
/* pDictIter->next();
pDictIter->getObject((AcDbObject*&)pMyCl,
AcDb::kForRead);
pMyCl->gethScale(hs);
pMyCl->getvScale(vs);
pMyCl->close();
acutPrintf("\nintval is:    %d", hs);*/
delete pDictIter;
}
pNamedobj->close();
   pDict->close();请版主帮助，谢谢，！！！！！！