我想提取谷歌结果链接
我的代码工作它确实提取链接,但这些链接不是我期望提取的。
我的程序将提取" a href"标签,但搜索结果中的所有链接都不包括适当的链接,广告链接,谷歌链接
我该怎么办?
using HtmlAgilityPack;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.ServiceModel.Syndication;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;
namespace Search
{
public partial class Form1 : Form
{
// load snippet
HtmlAgilityPack.HtmlDocument htmlSnippet = new HtmlAgilityPack.HtmlDocument();
public Form1()
{
InitializeComponent();
}
private void btn1_Click(object sender, EventArgs e)
{
listBox1.Items.Clear();
StringBuilder sb = new StringBuilder();
byte[] ResultsBuffer = new byte[8192];
string SearchResults = "http://google.com/search?q=" + txtKeyWords.Text.Trim();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(SearchResults);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream resStream = response.GetResponseStream();
string tempString = null;
int count = 0;
do
{
count = resStream.Read(ResultsBuffer, 0, ResultsBuffer.Length);
if (count != 0)
{
tempString = Encoding.ASCII.GetString(ResultsBuffer, 0, count);
sb.Append(tempString);
}
}
while (count > 0);
string sbb = sb.ToString();
HtmlAgilityPack.HtmlDocument html = new HtmlAgilityPack.HtmlDocument();
html.OptionOutputAsXml = true;
html.LoadHtml(sbb);
HtmlNode doc = html.DocumentNode;
foreach (HtmlNode link in doc.SelectNodes("//a[@href]"))
{
//HtmlAttribute att = link.Attributes["href"];
string hrefValue = link.GetAttributeValue("href", string.Empty);
// if ()
{
int index = hrefValue.IndexOf("&");
if (index > 0)
{
hrefValue = hrefValue.Substring(0, index);
listBox1.Items.Add(hrefValue.Replace("/url?q=", ""));
}
}
}
}
}
}
如果我想和" a href"标签我必须在If中添加一些条件
但我不知道我应该在这里使用什么条件:
if ()
某个地方我读过关于提取引用标签而不是ahref标签的任何人都可以帮忙吗?
答案 0 :(得分:1)
要获取cite
元素中包含的链接,只需访问其内部文本,例如:
HtmlWeb w = new HtmlWeb();
var hd = w.Load("http://www.google.com/search?q=veverke");
var cites = hd.DocumentNode.SelectNodes("//cite");
foreach (var cite in cites)
Console.WriteLine(cite.InnerText);