1.DateTime.Now.ToString("yyyy年MM月dd日 hh:mm:ss")
2.string.Format("{0:yyyyMMdd}", DateTime.Now);
3.<%#Eval("AddDate","{0:yyyy-MM-dd}") %>
4.<asp:BoundField DataField="NTime" HeaderText="时间" ReadOnly="True" DataFormatString="{0:yyyy-MM-dd}" />
5.DateTime.Parse(act.Date.ToString()).ToLongDateString().ToString()