方法一：
HtmlProxy.cs：
using System.Text;
using System.IO;
/// <summary>
/// HtmlProxy 的摘要说明
/// </summary>
public class HtmlProxy
{
public HtmlProxy()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
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) //文件存在
{
using (st)
{
StreamToStream(st, HttpContext.Current.Response.OutputStream);
return true;
//Response.End();
}
}
Else //文件不存在，根据ForumDetail.aspx页面的内容创建文件
{
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);
}
}
}
ForURL.aspx：
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
{
}
}
方法二：在页面中继承此类即可，当访问的时候自动生成静态页面
change.cs：
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;
/// <summary>
/// change 的摘要说明
/// </summary>
public class change : System.Web.UI.Page
{
public change()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
protected string FileName;
protected override void OnInit(EventArgs e)
{
int count = Request.Url.AbsolutePath.Length;
FileName = Request.Url.AbsolutePath.Remove(count - 4, 4) + "htm";//把要转换的页面后缀aspx去掉
if (File.Exists(Server.MapPath(FileName)))
{
File.Delete(Server.MapPath(FileName));
}
}
protected override void Render(HtmlTextWriter writer)
{
StringWriter html = new StringWriter();
HtmlTextWriter tw = new HtmlTextWriter(html);
base.Render(tw);
StreamWriter sw = new StreamWriter(Server.MapPath(this.FileName), false, System.Text.Encoding.UTF8);
sw.Write(html.ToString());
sw.Flush();
sw.Close();
tw.Close();
Response.Write(html.ToString());
}
}