SQL server 数据库ADO操作技术之2

5.初始化CListCtrl控件
CString temp[4]={"ID","stuName","age","score"};
	for (int i=0;i<4;i++)
	{
		m_listctrl.InsertColumn(i,temp[i],LVCFMT_LEFT,100);

	}

	CListCtrl *pmyListCtrl=(CListCtrl *)GetDlgItem(IDC_LIST2);
	DWORD dwStyle =GetWindowLong(pmyListCtrl->m_hWnd,GWL_STYLE);
	SetWindowLong(pmyListCtrl->m_hWnd,GWL_STYLE,dwStyle|LVS_REPORT);
	DWORD styles=pmyListCtrl->GetExtendedStyle();
	pmyListCtrl->SetExtendedStyle(styles|LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);

6.查找后显示
void CTextDlg::showtable()
{
	CString strSQL;
	CString strID,strName,strAge,strScore;
	_variant_t var;
    _RecordsetPtr ptr;//额外添加
	UpdateData(true);

	int index=0;
	m_listctrl.DeleteAllItems();
	strSQL.Format("select * from student");          //格式化SQL语句
	//zhongdian 
	ptr=((CTextApp*)AfxGetApp())->ado.ExecuteSQLSentence(strSQL);
//
    if(!ptr->BOF)
	{ 
		ptr->MoveFirst();                   
	}
	else
		return;
	while(!ptr->adoEOF)                     //当记录集指针不是指向最后一条的下面时
	{
        var=ptr->GetCollect("ID");           //获取字段值ID的值
		strID="";
		if (var.vt!=NULL)
		{
			strID=(LPCSTR)_bstr_t(var);     // 将获取的值赋给strID
		}

		var=ptr->GetCollect("stuName");           
		strName="";
		if (var.vt!=NULL)
		{
			strName=(LPCSTR)_bstr_t(var);     
		}

		var=ptr->GetCollect("age");           
		strAge="";
		if (var.vt!=NULL)
		{
			strAge=(LPCSTR)_bstr_t(var);     
		}

		var=ptr->GetCollect("score");           
		strScore="";
		if (var.vt!=NULL)
		{
			strScore=(LPCSTR)_bstr_t(var);     
		}

		m_listctrl.InsertItem(index,strID);
		m_listctrl.SetItemText(index,1,strName);
		m_listctrl.SetItemText(index,2,strAge);
		m_listctrl.SetItemText(index,3,strScore);
		ptr->MoveNext();
		index++;
		UpdateData(false);

	}

}
7.修改记录集

void CTextDlg::OnButton4() //改
{
	// TODO: Add your control notification handler code here

  	CString strSQL;
	CString strID,strName,strAge,strScore;
	_variant_t var;
    _RecordsetPtr ptr;//额外添加
	UpdateData(true);

	int index=0;
	strSQL.Format("update student set stuName='%s' where ID='%s'",m_strName,m_strID);          //格式化SQL语句
	//zhongdian 
	ptr=((CTextApp*)AfxGetApp())->ado.ExecuteSQLSentence(strSQL);

	
}
8.查找记录集
void CTextDlg::OnButton3() //查找
{
	// TODO: Add your control notification handler code here
	//	showtable();
	CString strSQL;
	CString strID,strName,strAge,strScore;
	_variant_t var;
    _RecordsetPtr ptr;//额外添加
	UpdateData(true);

	int index=0;
	m_listctrl.DeleteAllItems();
	strSQL.Format("select * from student where ID='%s'",m_strID);          //格式化SQL语句
	//zhongdian 
	ptr=((CTextApp*)AfxGetApp())->ado.ExecuteSQLSentence(strSQL);
//
    if(!ptr->BOF)
	{ 
		ptr->MoveFirst();                   
	}
	else
		return;
	while(!ptr->adoEOF)                     //当记录集指针不是指向最后一条的下面时
	{
        var=ptr->GetCollect("stuName"); 
		//获取字段值ID的值
		strName="";
		if (var.vt!=NULL)
		{
			strName=(LPCSTR)_bstr_t(var);     // 将获取的值赋给strID
		}
		m_strName=strName;
		UpdateData(false);

		break;
	}
	
}