Asp.Net 动态页面转静态页面主要代码


一个是一个页面转换的类,该类通过静态函数Changfile()来实现,动态页面到静态页面的转换。  

复制代码 代码如下:

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.Text;
  using System.IO;
  /**////
  /// Summary description for HtmlProxy
  ///
  public class HtmlProxy
  ...{
  public HtmlProxy()
  ...{
  }
  public static bool ChangeFile(int id)
  ...{
  string filename = HttpContext.Current.Server.MapPath("Post_" + id + ".html");
  //尝试读取已有文件   Stream st = GetFileStream(filename);
  //如果文件存在并且读取成功
  if (st != null)
  ...{
  using (st)
  ...{
  StreamToStream(st, HttpContext.Current.Response.OutputStream);
  return true;
  //Response.End();
  }
  }
  else
  ...{
  StringWriter sw = new StringWriter();
  HttpContext.Current.Server.Execute("ForumDetail.aspx?PID=" + id, sw);
  string content = sw.ToString();
  //写进文件

 try
  ...{
  using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.Write))
  ...{
  using (StreamWriter stw = new StreamWriter(fs, HttpContext.Current.Response.ContentEncoding))
  ...{
  stw.Write(content);
  }
  }
  return true;
  }
  catch ...{ return false; }
  }
  }
  private static Stream GetFileStream(string filename)
  ...{
  try
  ...{
  DateTime dt = File.GetLastWriteTime(filename);
  TimeSpan ts = dt - DateTime.Now;
  if (ts.TotalHours >1)
  ...{
  //一小时后过期
  return null;
  }
  return new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
  }
  catch ...{ return null; }
  }
  static public void StreamToStream(Stream src, Stream dst)
  ...{
  byte[] buf = new byte[4096];
  while (true)
  ...{
  int c = src.Read(buf, 0, buf.Length);
  if (c == 0)
  return;
  dst.Write(buf, 0, c);
  }
  }
  }
  在页面文件中,ForURL.aspx的后台代码如下:
  protected void Page_Load(object sender, EventArgs e)
  ...{
  try
  ...{
  int id = int.Parse(Request.QueryString["PID"]);
  if(HtmlProxy.ChangeFile(id))
  ...{
  Response.Redirect("Post_" + id + ".html");
  }
  else
  ...{
  Response.Redirect("Post.aspx?PID=" + id );
  }
  }
  catch ...{
  }
  }



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