Asp.Net中动态页面转静态页面

关于在Asp.Net中动态页面转静态页面的方法网上比较多。结合实际的需求，我在网上找了一些源代码，并作修改。现在把修改后的代码以及说明写一下。

一下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。

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>
/// Summary description for HtmlProxy
/// </summary>
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; }
}

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 {
}
}