Asp.net GroupBox 代码

 

< fieldset >
                         < legend > In UpdatePanel </ legend > UpdatePanel content refreshed at
                         <% = DateTime.Now.ToString()  %>
                         < asp:Button  ID ="Button1"  Text ="RefreshUpdatePanel"  runat ="server"   />
                     </ fieldset >

效果如下：

In UpdatePanel

UpdatePanel content refreshed at <%=DateTime.Now.ToString() %>