从网上看到一个aspx转换成html的类，如下
public class AspxToHtml
    {
        /// <summary> 
        /// Aspx文件url 
        /// </summary> 
        public string strUrl;
        /// <summary> 
        /// 生成html文件的保存路径 
        /// </summary> 
        public string strSavePath;
        /// <summary> 
        /// 生成html文件的文件名 
        /// </summary> 
        public string strSaveFile;
        public AspxToHtml()
        {
        }

        /// <summary> 
        /// 将strUrl放到strSavePath目录下，保存为strSaveFile 
        /// </summary> 
        /// <returns>是否成功</returns> 
        public bool ExecAspxToHtml()
        {
            try
            {
                StringWriter strHTML = new StringWriter();
                System.Web.UI.Page myPage = new Page();   //System.Web.UI.Page中有个Server对象，我们要利用一下它 
                myPage.Server.Execute(strUrl, strHTML);    //将asp_net.aspx将在客户段显示的html内容读到了strHTML中
                StreamWriter sw = new StreamWriter(strSavePath + strSaveFile, false, System.Text.Encoding.GetEncoding("GB2312"));
                //新建一个文件Test.htm，文件格式为GB2312 

                sw.Write(strHTML.ToString());             //将strHTML中的字符写到Test.htm中 
                strHTML.Close();                          //关闭StringWriter 
                sw.Close();                                    //关闭StreamWriter 
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// <summary> 
        /// 将Url放到Path目录下，保存为FileName 
        /// </summary> 
        /// <param name="Url">aspx页面url</param> 
        /// <param name="Path">生成html文件的保存路径</param> 
        /// <param name="FileName">生成html文件的文件名</param> 
        /// <returns></returns> 
        public bool ExecAspxToHtml(string Url, string Path, string FileName)
        {
            try
            {
                StringWriter strHTML = new StringWriter();
                System.Web.UI.Page myPage = new Page();   //System.Web.UI.Page中有个Server对象，我们要利用一下它 
                myPage.Server.Execute(Url, strHTML);       //将asp_net.aspx将在客户段显示的html内容读到了strHTML中 
                StreamWriter sw = new StreamWriter(Path + FileName, false, System.Text.Encoding.GetEncoding("GB2312"));
                //新建一个文件Test.htm，文件格式为GB2312 
                sw.Write(strHTML.ToString());             //将strHTML中的字符写到Test.htm中 
                strHTML.Close();                          //关闭StringWriter 
                sw.Close();                                    //关闭StreamWriter 
                return true;
            }
            catch (Exception ex)
            {
                System.Console.WriteLine(ex.Message);
                return false;
            }
        }
    }

新建两个aspx页面：AspxToHtml.aspx和Test.aspx,
AspxToHtml.aspx.cs内容如下
AspxToHtml aspx = new AspxToHtml();

    protected void Page_Load(object sender, EventArgs e)
    {
        aspx.ExecAspxToHtml(@"Test.aspx", @"C:\", "test.html");
    }
这样每当页面加载的时候就把Test.aspx页面生产为Test.html,可能好多网站的新闻也是这样生产的吧。