生成静态页面有关问题，请大家帮忙看下

生成静态页面问题，请大家帮忙看下
为什么生成的静态页面是空的，什么内容都没有，连html代码都没，请帮我看看哪有问题，谢了。
这是模板

HTML code

 
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
  <html xmlns="http://www.w3.org/1999/xhtml"> 
  <head> 
  <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
  <title>{##title##} </title> 
  <link rel="stylesheet" type="text/css" href="../../css/css.css" /> 
  <link rel="stylesheet" type="text/css" href="../../css/index.css" /> 
  </head> 

  <body> 
  <div style="width:1002px; margin:auto;"> 
  <iframe scrolling="no" width="1002px" height="132px" src="../../UserControl/newsheader.aspx" frameborder="0"> </iframe> </div> 
  <div style="width:1002px; margin:auto;"> <img src="../../images/xwzx_02.gif" /> </div> 
  <div id="newsshow"> 
     <div class="news_nr"> 
        <div style="font-family:'宋体'; font-size:16px; font-weight:bold; color:#FFFFFF; text-align:center">{##title##} </div> 
 	   <div style="font-family:'宋体'; margin-top:6px; margin-bottom:6px; font-size:12px; color:#FFFFFF; text-align:center">{##time##} </div> 
 	  	   <div style="font-family:'宋体'; margin-top:6px; margin-bottom:6px; font-size:12px; color:#FFFFFF; margin:6px 200px;">{##text##} </div> 
     </div> 
  </div> 
  <div id="Banquan"> &copy;2007-2008  </div> 
  </body> 
  </html>

这是生成静态页的类

C# code


using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Text;

/// <summary>
/// 生成静态页面类
/// </summary>
public class StaticHtml
{
    /// <summary>
    /// 新闻标题
    /// </summary>
    private string _title = "这里是标题的内容";
    /// <summary>
    /// 新闻内容
    /// </summary>
    private string _content = "暂无内容";
    /// <summary>
    /// 新闻上传时间
    /// </summary>
    private string _time = "";
    /// <summary>
    /// 生成的文件的保存路径；
    /// </summary>
    private string _path = "htmlpath";
    /// <summary>
    /// 返回静态页的地址
    /// </summary>
    private string _htmlPath;
    /// <summary>
    /// 返回消息
    /// </summary>
    private string _msg;
    /// <summary>
    /// 新闻标题
    /// </summary>
    public string Title
    {
        set
        {
            _title = value;
        }
        get
        {
            return _title;
        }
    }
    /// <summary>
    /// 新闻内容
    /// </summary>
    public string Content
    {
        set
        {
            _content = value;
        }
        get
        {
            return _content;
        }
    }
     /// <summary>
    /// 新闻上传时间
    /// </summary>
    public string Time
    {
        set
        {
            _time = value;
        }
        get
        {
            return _time;
        }
    }
    /// <summary>
    /// 生成的文件的保存路径；
    /// </summary>
    public string Path
    {
        set
        {
            _path = value;
        }
        get
        {
            return _path;
        }
    }
    /// <summary>
    /// 返回消息
    /// </summary>
    public string Msg
    {
        get
        {
            return _msg;
        }
    }
     /// <summary>
    /// 返回静态页的地址
    /// </summary>
    public string HtmlPath
    {
        get
        {
            return _htmlPath;
        }
    }
    public StaticHtml()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }

    public void GetHtml() 
    {
        //创建静态页文件夹的文件夹名（eg：2008-09）
        string _dt = DateTime.Now.ToString("yyyyMM");
        //创建静态页文件夹的绝对路径
        string _outPutPath = HttpContext.Current.Server.MapPath("~")+"\\" + Path + "\\" + _dt + "\\";
        //用于创建，移动，枚举目录的实例
        DirectoryInfo directoryinfo = new DirectoryInfo(_outPutPath);
        //如果文件夹不存在创建文件夹
        if (!directoryinfo.Exists) 
        {
            directoryinfo.Create();
        }
        //编码格式
        Encoding encoding = Encoding.GetEncoding("gb2312");
        //静态页母版的绝对路径
        string _modelPath = HttpContext.Current.Server.MapPath("Temp/temp.html");
        //声明一个读流
        StreamReader sr = null;
        //声明一个写流
        StreamWriter sw = null;
        //声明一个字符串用来替换title，content，time
        string _str="";

        try
        {
            //实例化一个读流对象，参数母版绝对路径和编码格式
            sr = new StreamReader(_modelPath, encoding);

            //从当前位置到末尾把母版读到流里
            sr.ReadToEnd();
        }
        catch (Exception ex)
        {
            HttpContext.Current.Response.Write(ex.Message);
            HttpContext.Current.Response.End();
            sr.Close();
        }
  
        //生成的静态页的文件名(把-替换成“”)
        string _htmlName = DateTime.Now.ToShortDateString().Replace("-","")
                           + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString()
                           + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString() + ".html";

        _str = _str.Replace("{##title##}", Title);

        _str = _str.Replace("{##time##}", Time);

        _str = _str.Replace("{##text##}", Content);
        try 
        {
            sw = new StreamWriter((_outPutPath + _htmlName),false,encoding);

            sw.Write(_str);

            sw.Flush();

            _msg = " 成功生成静态页面！";

            _htmlPath = _dt + "\\" + _htmlName;
        }
        catch(Exception ex)
        {
             HttpContext.Current.Response.Write(ex.Message);
             HttpContext.Current.Response.End();
             _msg = "产生错误，请重试";
        }
        finally
        {
            sw.Close();
        }

       
    }
}

生成静态页面有关问题，请大家帮忙看下

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