C#判断访问来源是否为搜索引擎链接的方法

/// 判断是否来自搜索引擎链接/// 是否来自搜索引擎链接public static bool IsSearchEnginesGet(){if (HttpContext.Current.Request.UrlReferrer == null){return false;}string[] SearchEngine = { "google", "yahoo", "msn", "baidu", "sogou", "sohu", "sina", "163", "lycos", "tom", "yisou", "iask", "soso", "gougou", "zhongsou","bing" };string tmpReferrer = HttpContext.Current.Request.UrlReferrer.ToString().ToLower();for (int i = 0; i < SearchEngine.Length; i++){if (tmpReferrer.IndexOf(SearchEngine[i]) >= 0){return true;}}return false;}