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ASP.NET获取远程网页下载到本地文件,通过URL生成静态文件的做法

2011-10-18 09:33 976 查看

TestWeb.aspx.cs 后台文件

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

public partial class TestWeb : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}/// <summary>
/// 生成网页文件
/// </summary>
/// <param name="url">远程URL</param>
/// <param name="filename">生成文件名路径</param>
/// <param name="pagecode">目标URL页面编码</param>
protected void DownUrltoFile(string url, string filename, string pagecode)
{
try
{
//编码
Encoding encode = Encoding.GetEncoding(pagecode);
//请求URL
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
//设置超时(10秒)
req.Timeout = 10000;
this.NotFolderIsCreate(filename);
//获取Response
HttpWebResponse rep = (HttpWebResponse)req.GetResponse();
//创建StreamReader与StreamWriter文件流对象
StreamReader sr = new StreamReader(rep.GetResponseStream(), encode);
StreamWriter sw = new StreamWriter(Server.MapPath(filename), false, encode);
//写入内容
sw.Write(sr.ReadToEnd());
//清理当前缓存区，并将缓存写入文件
sw.Flush();
//释放相关对象资源
sw.Close();
sw.Dispose();
sr.Close();
sr.Dispose();
Response.Write("生成文件" + filename + "成功");
}
catch (Exception ex)
{
Response.Write("生成文件" + filename + "失败，原因：" + ex.Message);
}
}
/// <summary>
/// 文件夹不存在则创建
/// </summary>
/// <param name="filename">文件名所在路径</param>
protected void NotFolderIsCreate(string filename)
{
string fileAtDir = Server.MapPath(Path.GetDirectoryName(filename));
if (!Directory.Exists(fileAtDir))
Directory.CreateDirectory(fileAtDir);
}
protected void Button1_Click(object sender, EventArgs e)
{
string txtStr = this.TextBox1.Text.ToString();
string rolName = System.Guid.NewGuid().ToString();
this.DownUrltoFile("" + txtStr + "", "html/" + rolName + ".htm", "GB2312");

}
}

TestWeb.aspx前台文件

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="TestWeb.aspx.cs" Inherits="TestWeb" %>

<!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 runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>

</div>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</form>
</body>
</html>

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