抓取网页 重点事例可以挖别人网站的新闻

显示页面的CS代码:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using System.Net;

public partial class HttpWebRequest : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write(this.GetPageContent());
    }
    private string url = "http://zhidao.baidu.com/question/25163119.html"; //"http://www.soso.com/q?pid=s.w.res.input&gid=&cin=&sc=web&bs=dsfs&ch=w.uf&w=web&lr=";

    //public string GetPageContent()
    //{
    //    string ResponseText = String.Empty;
    //    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(this.url);
    //    request.UserAgent = Request.UserAgent;

    //    System.Net.WebResponse response = request.GetResponse();

    //    //返回信息
    //    Stream resStream = response.GetResponseStream();
    //    StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);
    //    ResponseText = sr.ReadToEnd();
    //    resStream.Close();
    //    sr.Close();

    //    return ResponseText;
    //}

    public string GetPageContent()
    {
        string ResponseText = String.Empty;
        WebRequest request = WebRequest.Create(this.url);
        request.Headers.Keys.ToString();
        System.Net.WebResponse response = request.GetResponse();

        //返回信息
        Stream resStream = response.GetResponseStream();
        StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default);
        ResponseText = sr.ReadToEnd();
        resStream.Close();
        sr.Close();

        return ResponseText;
    }

}