前台：<div id="navigation" runat="server"></div>  

例如前台div内的代码为

<li><span><span class="span1">运动鞋尺码</span></span>：<a href="#;">40</a><a href="#;">41</a></li>  

后台：  

先引进

using System.Text;

然后开始动态从数据库内取值

            string sql = "";
            DataSet ds = SqlHelper.ExecuteDataset(CommandType.Text, sql);
            StringBuilder builder = new StringBuilder();
           builder.Append("<li><span>运动鞋尺码</span>:");           

         for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                builder.Append("<a href=\"#\">"+ ds.Tables[0].Rows[i][0].ToString() + "</a>");
            }
            builder.Append("</li>");
            navigation.InnerHtml = builder.ToString(); 

这段代码在页面加载时调用    

?