使用asp.net或者asp檢查某個url地址，某篇文章是否被搜索引擎，如百度，谷歌，搜狗收錄。
實現原理：直接搜索你那篇文章的url地址（不帶協議，但上協議也行，代碼會自動去掉協議內容），如果被索引會返回搜索結果，否則會提示找不到信息。
Asp.Net檢查百度，谷歌，搜狗搜索引擎是否收錄文章網址源代碼：
using System;using System.Net;using System.Text;using System.IO;using System.Web;public class SearchEngineIndex{ public static string[] urls = { //搜索引擎檢查地址 "http://www.baidu.com/s?ie=utf-8&wd=",//百度索引url檢查地址 "https://www.google.com.hk/search?q=",//谷歌索引url檢查地址 "http://www.sogou.com/web?ie=utf8&query="//搜狗索引url檢查地址 } , noFindKeyword = { "抱歉，沒有找到與", "找不到和您的查詢", "未收錄？" };//搜索引擎未索引url地址時的關鍵字 /// <summary> /// 獲取響應的編碼 /// </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對象，自動識別字符集 /// </summary> /// <param name="url"></param> /// <param name="addUseragent">是否添加UserAgent，采集其他網站時防止被攔截</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> /// 檢查某個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直接查網址顯示的結果不是直接得到網址的，有些出入，不做檢查</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; }}//調用方法示例 SearchEngineIndex.CheckIndex("www.49028c.com/article/20101014/2902.aspx", 0);//檢查百度索引 SearchEngineIndex.CheckIndex("www.49028c.com/article/20101014/2902.aspx", 1);//檢查谷歌索引 SearchEngineIndex.CheckIndex("www.49028c.com/article/20101014/2902.aspx", 2);//檢查搜狗索引 Asp檢查百度，谷歌，搜狗搜索引擎是否收錄文章網址源代碼：
<%class SearchEnginIndex dim urls,noFindKeyword private sub Class_Initialize '百度，谷歌，搜狗url地址索引查詢地址 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地址時的關鍵字 NoFindKeyword=array("抱歉，沒有找到與", "找不到和您的查詢", "未收錄？") 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)'將2進制流數據依據編碼轉為對應的字符串內容 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.49028c.com/article/20101014/2902.aspx",0)'百度索引response.Write sei.CheckIndex("www.49028c.com/article/20101014/2902.aspx",1)'谷歌索引response.Write sei.CheckIndex("www.49028c.com/article/20101014/2902.aspx",2)'搜狗索引set sei=nothing %> 
