获取外部图纸中的数据库

其中filePath是外部图纸的保存地址，这是对于使用ZWCAD来编写时，需要在创建数据库之前，提供一个服务，具体代码如下面：

ZcDbDatabase * getDataByDwg(CString filePath)
{

//提供服务

class ZcDbHostApplicationServicesEx : public ZcDbHostApplicationServices
{
public:
ZcDbHostApplicationServicesEx(){};
virtual Zcad::ErrorStatus findFile(ZTCHAR * pcFullPathOut,
int nBufferLength,
const ZTCHAR * pcFilename,
ZcDbDatabase * pDb = NULL,

ZcDbHostApplicationServices::FindFileHint hint = kDefault){return Zcad::eOk;}
};
Zcad::ErrorStatus es;
ZcDbHostApplicationServicesEx *pdbsvr = new ZcDbHostApplicationServicesEx;
zcdbSetHostApplicationServices(pdbsvr);

//定义一个数据库对象
ZcDbDatabase *pDb = NULL;
pDb = new ZcDbDatabase(ZSoft::kFalse);

Zcad::ErrorStatus es = pDb->readDwgFile(filePath);
if (Zcad::eOk != es)
{

zcutPrintf(filePath + _T("\n在当前文件中不存在！"));
delete pDb;
pDb = NULL;
return NULL;
}
return pDb;
}

///////////////////////////////////////////////////////////////////////////////////////////////////////

对于autocad的话，就不需要提供服务，可以直接创建数据库，然后通过readDwgFile来获得外部图纸的数据库，代码如下：

AcDbDatabase * getDataByDwg(CString filePath)
{
//定义一个数据库对象
AcDbDatabase *pDb = NULL;
pDb = new AcDbDatabase(Adesk::kFalse);

Acad::ErrorStatus es = pDb->readDwgFile(filePath);
if (Acad::eOk != es)
{

acutPrintf(filePath + _T("\n在当前文件中不存在！"));
delete pDb;
pDb = NULL;
return NULL;
}
return pDb;
}