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