VC CADODatabase操作数据库

记录下来，后面查询使用

 

【1】打开

    CADODatabase database;
    CString strConnection;
    CString strError;
    BOOL bResult;
   
    pDatabase = new CADODatabase();

    strConnection.Format("Provider=OraOLEDB.Oracle;Data Source=%s;User Id=%s;Password=%s;",
                            "datasource","user","pass");
    pDatabase->SetConnectionString(strConnection);
    bResult = pDatabase->Open();
   
    if (!bResult)
    {
        CString strError = "测试数据库服务器连接失败!错误原因:/r/n/r/n/r/n";
        strError += database.GetLastErrorString();
        cout <<strError.GetBuffer(0) << endl;
    }else
    {
        cout << "connect ok" << endl;
    }

 

【2】新加

    CString strRecordID, strTruckID, strCoalMineID;

    BOOL bRet;

    CADORecordset *p_rs = new CADORecordset(pDatabase);

    CString quryStr;
    quryStr.Format("xc_Loadameter");

    bRet = p_rs->Open((LPCTSTR)quryStr);

    p_rs->AddNew();
    p_rs->SetFieldValue("RECORDID",strRecordID);
    p_rs->SetFieldValue("TRUCKID",strTruckID);
    p_rs->SetFieldValue("COALMINEID",strCoalMineID);   

    bRet = p_rs->Update();

    p_rs->Close();
    delete p_rs;

【3】更新

    CADORecordset *p_rs = new CADORecordset(pDatabase);
    CString quryStr;
    quryStr.Format("select * from xc_Loadameter where FIRSTMESUREFLAG = 1");
    p_rs->Open((LPCTSTR)quryStr);

    if (p_rs->GetRecordCount() == 1)
    {
        p_rs->Edit();

        double d = 3.1415926;
        p_rs->SetFieldValue("FIRSTWEIGHT", d);
        p_rs->Update();  //注意：在Update()前，记录指针必须位于记录起始位置 p_rs->MoveFirst();
    }

    p_rs->Close();
    delete p_rs;

 

【3】遍历

    CString strCoalNo;
    BOOL bRet = FALSE;

    CADORecordset *p_rs = new CADORecordset(pDatabase);
    CString quryStr;
    quryStr.Format( "SELECT * FROM xc_loadameter");
    bRet = p_rs->Open((LPCTSTR)quryStr);
    if (!bRet)
    {
        cout << "Open Error" << endl;
    }

    while (!p_rs->IsEof())
    {
        p_rs->GetFieldValue("COALMINEID", strCoalNo);
        cout << strCoalNo << endl;
        p_rs->MoveNext();
    }

    p_rs->Close();
    delete p_rs;

 

【4】删除

  CString strCoalNo;
  CADORecordset *p_rs = new CADORecordset(pDatabase);
  CString quryStr;
  quryStr.Format( "SELECT * FROM xc_loadameter");
  p_rs->Open((LPCTSTR)quryStr);

 p_rs->Delete();
   p_rs->Close();
  delete p_rs;