使用asp.net或者asp检查某个url地址，某篇文章是否被搜索引擎，如百度，谷歌，搜狗收录。

实现原理：直接搜索你那篇文章的url地址（不带协议，但上协议也行，代码会自动去掉协议内容），如果被索引会返回搜索结果，否则会提示找不到信息。

Asp.Net检查百度，谷歌，搜狗搜索引擎是否收录文章网址源代码：

using System;
using System.Net;
using System.Text;
using System.IO;
using System.Web;
public class SearchEngineIndex
{
 public static string[] urls = { //搜索引擎检查地址
 "http://www.baidu.com/s?ie=utf-8&wd=",//百度索引url检查地址
 "https://www.google.com.hk/search?q=",//谷歌索引url检查地址
 "http://www.sogou.com/web?ie=utf8&query="//搜狗索引url检查地址
 }
 , noFindKeyword = { "抱歉，没有找到与", "找不到和您的查询", "未收录？" };//搜索引擎未索引url地址时的关键字
 /// <summary>
 /// 获取响应的编码
 /// </summary>
 /// <param name="contenttype"></param>
 /// <returns></returns>
 private static Encoding GetEncoding(string contenttype)
 {
 if (!string.IsNullOrEmpty(contenttype))
 {
 contenttype = contenttype.ToLower();
 if (contenttype.IndexOf("gb2312") != -1 || contenttype.IndexOf("gbk") != -1) return Encoding.GetEncoding(936);
 if (contenttype.IndexOf("big5") != -1) return Encoding.GetEncoding(950);
 }
 return Encoding.UTF8;
 }
 /// <summary>
 /// 使用HttpWebRequest对象，自动识别字符集
 /// </summary>
 /// <param name="url"></param>
 /// <param name="addUseragent">是否添加UserAgent，采集其他网站时防止被拦截</param>
 /// <returns></returns>
 public static string GetHtml(string url, bool addUseragent)
 {
 HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
 if (addUseragent) request.UserAgent = "Googlebot|Feedfetcher-Google|Baiduspider";
 string html = null;
 try
 {
 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
 StreamReader srd = new StreamReader(response.GetResponseStream(), GetEncoding(response.ContentType));
 html = srd.ReadToEnd();
 srd.Close();
 response.Close();
 }
 catch { }
 return html;
 }
 /// <summary>
 /// 检查某个url是否被搜索引擎索引
 /// </summary>
 /// <param name="url">url地址</param>
 /// <param name="engin">0：百度 1：谷歌 2：搜狗，其他搜索引擎如bing和360直接查网址显示的结果不是直接得到网址的，有些出入，不做检查</param>
 /// <returns></returns>
 public static bool CheckIndex(string url, int engin)
 {
 if (string.IsNullOrEmpty(url)) return false;
 if (engin < 0 || engin > 2) engin = 0;
 url = urls[engin] + HttpUtility.UrlEncode(url.ToLower().Replace("http://", "").Replace("https://", ""));
 bool r = true;
 string html = GetHtml(url, true);
 if (html == null || html.IndexOf(noFindKeyword[engin]) != -1) r = false;
 return r;
 }
}



//调用方法示例

 SearchEngineIndex.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx", 0);//检查百度索引
 SearchEngineIndex.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx", 1);//检查谷歌索引
 SearchEngineIndex.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx", 2);//检查搜狗索引

Asp检查百度，谷歌，搜狗搜索引擎是否收录文章网址源代码：

<%
class SearchEnginIndex
 dim urls,noFindKeyword
 private sub Class_Initialize
 '百度，谷歌，搜狗url地址索引查询地址
 urls=array("http://www.baidu.com/s?ie=utf-8&wd=","https://www.google.com.hk/search?q=","http://www.sogou.com/web?ie=utf8&query=")
 '搜索引擎未索引url地址时的关键字
 NoFindKeyword=array("抱歉，没有找到与", "找不到和您的查询", "未收录？")
 End sub
 private function GetEncoding(contenttype)
 contenttype=lcase(contenttype)
 if instr(contenttype,"gb2312")<>0 and instr(contenttype,"gbk")<>0 then
 GetEncoding="gb2312"
 elseif instr(contenttype,"big5")<>0 then
 GetEncoding="big5"
 else
 GetEncoding="utf-8"
 end if
 end function
 private function BinToString(bin,encoding)'将2进制流数据依据编码转为对应的字符串内容
 dim obj
 set obj=Server.CreateObject("Adodb.Stream")
 obj.Type=1:obj.Mode=3:obj.Open
 obj.Write bin
 obj.Position=0:obj.Type=2:obj.Charset=encoding
 BinToString=obj.ReadText
 obj.Close:set obj=nothing
 end function
 public function GetHtml(url)
 dim xhr
 set xhr=server.CreateObject("microsoft.xmlhttp")
 xhr.open "get",url,false
 xhr.send
 encoding=GetEncoding(xhr.getResponseHeader("content-type"))
 response.CharSet=encoding
 GetHtml=BinToString(xhr.responsebody,encoding)
 set xhr=nothing
 end function
 public function CheckIndex(url,engin)
 if len(url)=0 then exit function
 if engin<0 or engin>2 then engin=1
 url=urls(engin)&server.URLEncode(url)
 dim html
 html=GetHtml(url)
 CheckIndex=instr(html,NoFindKeyword(engin))=0
 End function
end Class
set sei=new SearchEnginIndex
response.Write sei.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx",0)'百度索引
response.Write sei.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx",1)'谷歌索引
response.Write sei.CheckIndex("www.gxlcms.com/article/20101014/2902.aspx",2)'搜狗索引
set sei=nothing
 %>