Question

使用了以下代码进行查询，但是查询到的结果（UGRecordsetPtr）为空。麻烦帮看一下。

int nPntCount=points.length();
        
        UGPoint2D *pUGPoint2d = new UGPoint2D[nPntCount];
        if (NULL == pUGPoint2d)
        {
            return false;
        }
        
        for (size_t i = 0; i < nPntCount; i++)
        {
            pUGPoint2d[i].x = points.at(i).x;
            pUGPoint2d[i].y = points.at(i).y;
        }
        
        UGGeoRegion *uRegion=new UGGeoRegion;
        UGbool bAdd = pRegion->Make(pUGPoint2d,nPntCount);
        if (!bAdd)
        {
            delete[] pUGPoint2d;
            pUGPoint2d = NULL;
            return;
        }
        UGQueryDef queryDef;
        
        queryDef.m_nType = UGQueryDef::Contains;
        
        pRegion->ToElement(queryDef.m_pElement);
        UGRecordsetPtr recordset = pDataset->Query(queryDef);
        if(recordset==NULL)
        {
            return false;
        }