protected void Button1_Click(object sender, EventArgs e)

    {

        //在生成新文件之前，删除原来的

        System.IO.DirectoryInfo pathd = new System.IO.DirectoryInfo(Server.MapPath("~/html"));//删除html文件夹下文件

        deletefile(pathd);



        StreamWriter sw = null;

        StreamReader sr = null;

        string htmlfilename = "";

        string str1 = "";

        string path1 = HttpContext.Current.Server.MapPath("i.htm");//模板

        string path = HttpContext.Current.Server.MapPath("~/html/");//生成文件放在html文件夹下

        try

        {

            sr = new StreamReader(path1, Encoding.GetEncoding("GB2312"));

            str1 = sr.ReadToEnd();

        }

        catch (Exception ex)

        {

            throw ex;

        }

        finally

        {

            sr.Close();

        }

        try

        {

            for (int i = 0; i < 4; i++)

            {



                htmlfilename = ""+ i +".html";

                sw = new StreamWriter(path + htmlfilename, false, Encoding.GetEncoding("GB2312"));

                str1 = str1.Replace("$i$", i.ToString());

                sw.Write(str1);

                sw.Flush();

            }

        }

        catch (Exception ex)

        {

            HttpContext.Current.Response.Write(ex);

            HttpContext.Current.Response.End();

        }

        finally

        {

       &n