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.jb51.NET/article/20101014/2902.ASPx", 0);//检查百度索引    SearchEngineIndex.CheckIndex("www.jb51.NET/article/20101014/2902.ASPx", 1);//检查谷歌索引    SearchEngineIndex.CheckIndex("www.jb51.NET/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 functionend Classset sei=new SearchEnginIndexresponse.Write sei.CheckIndex("www.jb51.NET/article/20101014/2902.ASPx",0)'百度索引response.Write sei.CheckIndex("www.jb51.NET/article/20101014/2902.ASPx",1)'谷歌索引response.Write sei.CheckIndex("www.jb51.NET/article/20101014/2902.ASPx",2)'搜狗索引set sei=nothing %>

AspNet技术：Asp.Net、asp实现的搜索引擎网址收录检查程序，转载需保留来源！

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