高分在线求怎么获取网页代码-C#教程-爱易网页

高分在线求怎么获取网页代码

日期：2014-05-17　浏览次数：20854 次

高分在线求如何获取网页代码
获取网页源码我使用的方法如下：
WebClient Client = new WebClient();
Stream strm = Client.OpenRead(URL);
StreamReader sr = new StreamReader(strm, Encoding.Default);
txtCode.Text = sr.ReadToEnd();
sr.Close();
strm.Close();

但是最近获取卓越网页的时候，超过400页就获取不到了。
获取网址地址如下：
http://www.amazon.cn/gp/search/ref=sr_pg_403?rh=n%3A658390051&page=403&bbn=658391051&ie=UTF8&qid=1299726491&tab=books&pageTypeID=658390051#/ref=sr_pg_404?rh=n%3A658390051&page=404&bbn=658391051&ie=UTF8&qid=1299726576

请问如何实现获取，谢谢了。

------解决方案--------------------
try
{
WebClient wc = new WebClient();

wc.Encoding = System.Text.Encoding.UTF8;

var html = wc.DownloadString("http://www.amazon.cn/gp/search/ref=sr_pg_403?rh=n%3A658390051&page=403&bbn=658391051&ie=UTF8&qid=1299726491&tab=books&pageTypeID=658390051#/ref=sr_pg_404?rh=n%3A658390051&page=404&bbn=658391051&ie=UTF8&qid=1299726576");

FileInfo file = new FileInfo(Server.MapPath("123.htm"));

if (file.Exists)
{
file.Delete();
}

using (var stream = file.Create())
{

var bytes = System.Text.Encoding.UTF8.GetBytes(html);

stream.Write(bytes, 0, bytes.Length);

stream.Close();

}
}
catch (Exception ex)
{
Response.Write(ex.Message);
}

我可以抓取数据啊完全没问题啊
------解决方案--------------------

C# code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.IO.Compression;
using System.Text.RegularExpressions;

namespace WikiPageCreater.Common
{
    public class PageHelper
    {
        /// <summary>
        /// 根据 url 获取网页编码
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetEncoding(string url)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            StreamReader reader = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = 20000;
                request.AllowAutoRedirect = false;

                response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode == HttpStatusCode.OK && response.ContentLength < 1024 * 1024)
                {
                    if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                        reader = new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
                    else
                        reader = new StreamReader(response.GetResponseStream(), Encoding.ASCII);

                    string html = reader.ReadToEnd();

                    Regex reg_charset = new Regex(@"charset\b\s*=\s*(?<charset>[^""]*)");
                    if (reg_charset.IsMatch(html))
                    {
                        return reg_charset.Match(html).Groups["charset"].Value;
                    }
                    else if (response.CharacterSet != string.Empty)
                    {
                        return response.CharacterSet;
                    }

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高分在线求怎么获取网页代码

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