以下图是效果图：右边添加两个Web联合结果部件，分别连接百度和Google搜索。
OpenSearchBase类----抽象类父类
public abstract class OpenSearchBase : LayoutsPageBase { //搜索单词参数 public string SearchTerm { get { //根据网站的编码不同而获取的也不同 if (Request.Cookies.Get("encoding").Value == "gb2312") { string query = Page.Request["q"]; query = UrlEncode(query); return query; } else { return Page.Request["q"]; } } } //Url转码 public static string UrlEncode(string input) { if (input == null || "".Equals(input)) return ""; StringBuilder sb = new StringBuilder(); byte[] byStr = System.Text.Encoding.Default.GetBytes(input); for (int i = 0; i < byStr.Length; i++) { sb.Append(@"%" + Convert.ToString(byStr[i], 16)); } return (sb.ToString()); } //显示搜索条数参数 public int Count { get { return Convert.ToInt32(Page.Request["count"]); } } //获取搜索结果列表XML格式 public string GetResultsXML(string searchURL, string searchTerm, string selectNodes) { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(searchURL); CookieContainer cookie = new CookieContainer(); request.CookieContainer = cookie; WebResponse response = request.GetResponse(); HtmlDocument doc = new HtmlDocument(); try { if (response.ContentType == null || response.ContentType.ToLower().Contains("utf-8") || response.ContentType.ToLower().Contains("big5")) { //Google HtmlWeb hw = new HtmlWeb(); doc = hw.Load(searchURL); } else if (response.ContentType.ToLower().Contains("gb2312") || response.ContentType.ToLower().Contains("gbk")) { //Baidu request.Method = "GET"; Stream rss = response.GetResponseStream(); doc.Load(rss); } //Begin writing the RSS document StringBuilder resultsXML = new StringBuilder(); resultsXML.Append(" "); resultsXML.Append(" "); resultsXML.AppendFormat(" 60 ", searchTerm); HtmlNodeCollection nodeCollection = doc.DocumentNode.SelectNodes(selectNodes); foreach (HtmlNode htmlNode in nodeCollection) { string link = ""; string title = ""; string desc = ""; StringWriter descWriter = new StringWriter(); StringWriter titleWriter = new StringWriter(); StringWriter linkWriter = new StringWriter(); foreach (HtmlNode subNode in htmlNode.ChildNodes) { //在XML内容中找到标题(title)，URL地址(link)，描述(desc)和节点(subNode) string[] ltd = FindResultItems(link, title, desc, subNode); link = ltd[0]; title = ltd[1]; desc = ltd[2]; } Server.HtmlEncode(desc, descWriter); string encDescription = descWriter.ToString(); if (encDescription == "") { encDescription = "不能正常显示信息，如图片等"; } Server.HtmlEncode(title, titleWriter); string encTitle = titleWriter.ToString(); Server.HtmlEncode(link, linkWriter); string encLink = linkWriter.ToString(); resultsXML.AppendFormat(" -
{0} {1} {2} 2010-10-10 ", encTitle, encLink, encDescription); } //Complete RSS document resultsXML.Append(" "); return resultsXML.ToString(); } catch (Exception ex1) { StringBuilder errorXML = new StringBuilder(); errorXML.Append(" "); errorXML.Append(" "); //errorXML.Append(" 没有合适的结果 错误信息 -
错误信息 {0} ", ex1.ToString()); errorXML.Append(" "); return errorXML.ToString(); } finally { response.Close(); } } //在XML内容中找到标题(title)，URL地址(link)，描述(desc)和节点(subNode) public abstract string[] FindResultItems(string link, string title, string desc, HtmlNode subNode); } 百度BaiduSearch类
public partial class BaiduSearch : OpenSearchBase { protected override void Render(HtmlTextWriter writer) { //创建Cookie，因百度网站的编码是GB2312，设Cookie为gb2312 HttpCookie cookie = new HttpCookie("encoding", "gb2312"); Request.Cookies.Add(cookie); //获取搜索词 string searchTerm = base.SearchTerm; if (string.IsNullOrEmpty(searchTerm)) return; //获取搜索个数 int count = base.Count; //构建URL地址 string searchURL = string.Format("http://www.baidu.com/s?wd={0}&rn={1}", searchTerm, count); Response.ContentType = "text/xml"; //用HTMLTextWriter对象写出RSS文档 writer.Write(base.GetResultsXML(searchURL, searchTerm, "//td[@class='f']")); } //重写FindResultItems方法 public override string[] FindResultItems(string link, string title, string desc, HtmlNode subNode) { string[] ltd = new string[3]; ltd[0] = link; ltd[1] = title; ltd[2] = desc; if (subNode.Name == "a") { ltd[0] = subNode.Attributes["href"].Value; ltd[1] = subNode.InnerText.ToString(); } if (subNode.Name == "font") { string descHtml = subNode.InnerHtml; try { ltd[2] = descHtml.Substring(0, descHtml.IndexOf("")); } catch { ltd[2] = "不能正常显示...比如含有图片..."; } } return ltd; } } 谷歌GoogleSearch类
public partial class GoogleSearch : OpenSearchBase { protected override void Render(HtmlTextWriter writer) { //设置Cookie为utf-8 HttpCookie cookie = new HttpCookie("encoding", "utf-8"); Request.Cookies.Add(cookie); //获取搜索词和搜索个数，并创建搜索地址URL string searchTerm = base.SearchTerm; if (string.IsNullOrEmpty(searchTerm)) return; int count = base.Count; string searchURL = string.Format("http://www.google.com.hk/search?hl=zh-cn&q={0}", searchTerm); if (count != 0) { searchURL = searchURL + string.Format("&num={0}", count); } Response.ContentType = "text/xml"; //用HTMLTextWriter对象写出RSS文档 writer.Write(base.GetResultsXML(searchURL, searchTerm, "//li[@class='g']")); } //重写FindResultItems方法 public override string[] FindResultItems(string link, string title, string desc, HtmlNode subNode) { string[] ltd = new string[3]; ltd[0] = link; ltd[1] = title; ltd[2] = desc; //Find the list that contains the result items if (subNode.Name == "h3") { foreach (HtmlNode lineItemNode in subNode.ChildNodes) { ltd[0] = lineItemNode.Attributes[0].Value; ltd[1] = lineItemNode.InnerText.ToString(); } } if (subNode.Name == "div") { string descHtml = subNode.InnerHtml; try { ltd[2] = descHtml.Substring(0, descHtml.IndexOf("")); } catch { ltd[2] = "有图片，不能显示。。。"; } } return ltd; } }