記錄集元素個數,元素個數

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記錄集元素個數,元素個數
作者:BY  www.gudianxiaoshuo.com


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判斷記錄集中 某一列項為空白

_variant_t varValue;            varValue=pRecordSet->GetCollect (_T("班級"));            if (varValue.vt!=VT_NULL)            {                banjiStr=(LPCTSTR)_bstr_t(varValue);            }else                continue;

記錄的數目

            _RecordsetPtr pRecordNum;            numStr.Format (_T("Select * from ClassInfo order by ID"));                        pRecordNum->PutCursorLocation(adUseClient);// 添加此語句  才能用 GetRecordCount()得到記錄集中的記錄個數            pRecordNum->Open(            (LPCTSTR)numStr,            m_pConnectionStu.GetInterfacePtr(),            adOpenStatic,            adLockOptimistic,            adCmdText            );                        if(pRecordNum->adoBOF)                return;            else                pRecordNum->MoveFirst();                        int num=pRecordNum->GetRecordCount();            pRecordNum->MoveLast();

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