ADO读写DateTime方式

// 读取日期
var	= m_pResultSet->GetCollect(_variant_t("Birth_Time"));
	
DATE			dt		= var.date;
COleDateTime	da		= COleDateTime(dt);
CString			strData	= da.Format(_T("%Y-%m-%d"));
m_GridList.SetItemText(m_nRow, m_nColumn, strData);


// 写入日期
COleDateTime	oleDate = COleDateTime::GetCurrentTime();
CString			strDate = oleDate.Format(_T("%Y-%m-%d %H:%M:%S"));

m_pBorrowRS->Fields->GetItem(_variant_t("Borrow_Date"))->PutValue(_variant_t(strDate));	
m_GridList.SetItemText(m_nRow, m_nColumn, strDate);

或：
COleDateTime	oleDate = COleDateTime::GetCurrentTime();

_variant_t	vtDate;
vtDate.vt	= VT_DATE;
vtDate		= oleDate.Format(_T("%Y-%m-%d %H:%M:%S"));

m_pBorrowRS->Fields->GetItem(_variant_t("Borrow_Date"))->PutValue(vtDate);
m_GridList.SetItemText(m_nRow, 3, (LPCTSTR)_bstr_t(vtDate));

 COleDateTime::GetCurrentTime()        var.date                

                                    \                     /                 

                                      \                 /                  

                                         \            /                   

                                COleDateTime  oleDate;                                            

                                        /              \                  

                                      /                  \                

                                    /                      \   

              var = oleDate.Format(...)     strDate = oleDate.Format(...)