数据库写入

获取cad的安装路径

	static bool GetCadPath(CString & strCadPath)
	{
		//获取cad的安装路径
		DWORD dRet = GetModuleFileName(acedGetAcadWinApp()->m_hInstance, strCadPath.GetBuffer(_MAX_PATH), _MAX_PATH);
		if (0 == dRet)
		{
			return false;
		}
		strCadPath.ReleaseBuffer();
		return true;
	}

写入数据

	static void MyTestCreateDwg()
	{
		AcDbDatabase * pDb = new AcDbDatabase();   //创建一个数据库
		AcDbBlockTable * pBlkTbl = NULL;
		pDb->getSymbolTable(pBlkTbl, AcDb::kForRead);	//获取块表

		AcDbBlockTableRecord * pBlkTblRcd = NULL;
		pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd, AcDb::kForWrite); //获取块记录表
		pBlkTbl->close();	//关闭块表

		AcGePoint3d ptS(10, 10, 0);
		AcGePoint3d ptE(30,30,0);
		AcDbLine * pLine = new AcDbLine(ptS, ptE);  //创建一条直线（实体）
		pBlkTblRcd->appendAcDbEntity(pLine);		//将直线加入到块记录表中
		pLine->close();
		pBlkTblRcd->close();

		CString strCadPath;
		if (GetCadPath(strCadPath))	//得到cad安装的路径
		{
			strCadPath = strCadPath.Left(strCadPath.GetLength() - 8);  //减去 acad.exe
			acutPrintf(strCadPath);
			pDb->saveAs(strCadPath+_T("Test.dwg"));
		}
		delete pDb;
	}

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数据读取

static void MyTestReadDwg()
	{
		AcDbDatabase * pDb = new AcDbDatabase(false);  //创建一个数据库 对象为空
		CString strPath;
		GetCadPath(strPath);
		strPath = strPath.Left(strPath.GetLength() - 8);
		CString strDwgPath = strPath + _T("Test.dwg");
		pDb->readDwgFile(strDwgPath);	//数据库中读取信息

		//获取指定数据库中的所有实体进行遍历
		AcDbObjectIdArray allEntIds = Help::GetAllEntityIds(pDb);
		for (int i = 0; i < allEntIds.length(); i++)
		{
			AcDbEntity * pEnt = NULL;
			if (acdbOpenObject(pEnt,allEntIds[i],AcDb::kForRead) == Acad::eOk)
			{
				CString str = pEnt->isA()->name();
				acutPrintf(str);
				//acutPrintf(_T("类名称：%s"), (pEnt->isA())->name());
				pEnt->close();
			}
		}
		delete pDb;
	}