<asp:ScriptManager ID="ScriptManager1" runat="server">
                                </asp:ScriptManager>
                                <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                                <ContentTemplate>
                                       <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">
                                       </asp:Timer>
                                   
                             <asp:DataList runat="server" ID="ShowNewArticle" Width="436px">
                             <ItemTemplate>
                             <div id="newsItemDiv"  onmouseover="this.style.backgroundColor='#ddffff';" onmouseout="this.style.backgroundColor='';">
                             <span style="float:left;"><img src="<%# GetItemPic(Container.ItemIndex) %>" style="margin-bottom:-8px;" /><%#Eval("W_Depart")%>&nbsp;&nbsp;<%#Eval("W_UserName")%>&nbsp;&nbsp;<%#Eval("W_dataTime")%>&nbsp;&nbsp;<%#Eval("w_Time")%>&nbsp;&nbsp;<%#Eval("W_Incident")%></span> 
                             <span id="userName"></span>
                             </div>
                             </ItemTemplate>
                             <ItemStyle CssClass="newsItem" Font-Underline="False" />
                             </asp:DataList> 
                             </ContentTemplate>
                            </asp:UpdatePanel>  
 
Timer的Tick事件
 //每个1秒刷新页面
        protected void Timer1_Tick(object sender, EventArgs e)
        {
              //绑定datalist数据方法
              populateControl();
        }