private void getFriends()
        {            int previous_cursor=-1;            int next_cursor = -1;            while (next_cursor != 0)
            {                string cursor = Convert.ToString(previous_cursor);                string url = " http://api.t.sina.com.cn/statuses/friends.xml?source=AppKey&cursor=" + cursor;                string username = "dreamzsm@gmail.com";                string password = name; //这里输入你自己微博登录的的密码
                //注意这里的格式哦，为 "username:password"

                System.Net.WebRequest webRequest = System.Net.WebRequest.Create(url);
                System.Net.HttpWebRequest myReq = webRequest as System.Net.HttpWebRequest;                //身份验证
                string usernamePassword = username + ":" + password;
                CredentialCache mycache = new CredentialCache();
                mycache.Add(new Uri(url), "Basic", new NetworkCredential(username, password));
                myReq.Credentials = mycache;
                myReq.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword)));

                WebResponse wr = myReq.GetResponse();
                Stream receiveStream = wr.GetResponseStream();
                StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);                string content = reader.ReadToEnd();


                XmlDocument xmlDoc = new XmlDocument();

                xmlDoc.LoadXml(content);                // xmlDoc.Load("data1.xml");

                XmlNodeList nodeList = xmlDoc.SelectSingleNode("users").ChildNodes;//获取根节点的所有子节点

                next_cursor = Convert.ToInt16(nodeList.Item(nodeList.Count - 2).InnerText);
                previous_cursor = Convert.ToInt16(nodeList.Item(nodeList.Count-1).InnerText);                string xmlName = "friends_" + nodeList.Item(nodeList.Count - 1).InnerText + "_" + Convert.ToInt16(nodeList.Item(nodeList.Count - 2).InnerText) + ".xml";
                previous_cursor = next_cursor;

                xmlDoc.Save(xmlName);

            }
        }

<user>
    <id>1710993410</id>
    <screen_name>某丫大人</screen_name>
    <name>某丫大人</name>
    <province>43</province>
    <city>1</city>
    <location>湖南 长沙</location>
    <description>饭否儿，心朝饭否，春暖花开。 我还是@饿YA 我还真是懒得介绍了。</description>
    <url>http://1</url>
    <profile_image_url>http://tp3.sinaimg.cn/1710993410/50/1273755892</profile_image_url>
    <domain>
    </domain>
    <gender>f</gender>
    <followers_count>168</followers_count>
    <friends_count>79</friends_count>
    <statuses_count>846</statuses_count>
    <favourites_count>0</favourites_count>
    <created_at>Sun Mar 14 00:00:00 +0800 2010</created_at>
    <following>false</following>
    <verified>false</verified>
    <allow_all_act_msg>false</allow_all_act_msg>
    <geo_enabled>false</geo_enabled>
    <status>
      <created_at>Sun May 16 21:02:44 +0800 2010</created_at>
      <id>364379114</id>
      <text>烦死了快、</text>
      <source>
        <a href="">新浪微博</a>
      </source>
      <favorited>false</favorited>
      <truncated>false</truncated>
      <geo />
      <in_reply_to_status_id>
      </in_reply_to_status_id>
      <in_reply_to_user_id>
      </in_reply_to_user_id>
      <in_reply_to_screen_name>
      </in_reply_to_screen_name>
    </status>
  </user>

 /// <summary>
    /// 将所有好友都导出了，然后存储在ACCESS数据库中了。
    /// </summary>
    public void readAllXml()
    {        for (int i = 0; i < 8; i++)
        {            string fileName = "friends_" + Convert.ToString(i * 20) + "_" + Convert.ToString(i*20+20)+".xml";//按照存储XML文件时的命名规则进行读取
            readTsinaFriends(fileName);
        }
    }

/// <summary>
    /// 建立新浪微博的RSS文件
    /// </summary>
    public void CreateTsinaRssXmlFile()
    {

        OleDbConnection aConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\\coursware\\网络软文\\API_微波\\weibo.mdb");        string strCmd = "select id as idnum,screen_name as name from Friends";        //从ACCESS中获取数据
        aConnection.Open();
        OleDbDataAdapter da = new OleDbDataAdapter(strCmd, aConnection);
        DataSet ds = new DataSet();
        da.Fill(ds, "TSina");
        ds.DataSetName = "RssReader";
        DataTable dt = ds.Tables[0];//数据集的第0张表格


        XmlDocument xmldoc;

        XmlElement xmlelem;

        xmldoc = new XmlDocument();        //加入XML的声明段落
        XmlDeclaration xmldecl;
        xmldecl = xmldoc.CreateXmlDeclaration("1.0", "UTF-8", null);
        xmldoc.AppendChild(xmldecl);        //加入一个根元素
        xmlelem = xmldoc.CreateElement(" ", "opml", " ");
        xmldoc.AppendChild(xmlelem);

        XmlNode root = xmldoc.SelectSingleNode("opml");//查找<opml> 节点


        XmlElement xeHead = xmldoc.CreateElement("head");//创建一个<head>节点 
        //为head节点增加子节点
        XmlElement xeHeadsub = xmldoc.CreateElement("title");
        xeHeadsub.InnerText = "Rss Reader";//设置节点文本 
        xeHead.AppendChild(xeHeadsub);//添加到<head>子节点中 
        root.AppendChild(xeHead);//添加到<head>节点中 


        //增加body子节点，然后，将所有的RSS订阅信息全部写入到body节点中间
        XmlElement xeBody = xmldoc.CreateElement("body");
        root.AppendChild(xeBody);        //第一层循环是标签（文件夹循环）由于本次只做一个标签，所以就只循环一次了

        //RSS的文件夹属性节点
        XmlElement xe1 = xmldoc.CreateElement("outline");
        xe1.SetAttribute("text", "Tsina");//设置该节点title属性
        xe1.SetAttribute("title", "Tsina");//设置该节点title属性 --第一层的outline节点的属性表示的是RSS的标签或者说是文件夹


        //下面就要开始为此文件夹节点添加下属子节点，也就是添加一些实质的RSS地址了
        string strTitle = string.Empty;        string strText = string.Empty;        string strXmlUrl = string.Empty;        string strHtmlUrl = string.Empty;        for (int i = 0; i < dt.Rows.Count; i++)
        {
            strTitle = dt.Rows[i]["NAME"].ToString().Trim();
            strText = strTitle;
            strXmlUrl = "http://medcl.net/SinaRss.aspx?uid=" + dt.Rows[i]["IDNum"].ToString().Trim();
            strHtmlUrl = "http://t.sina.com.cn/" + dt.Rows[i]["IDNum"].ToString().Trim();

            XmlElement xesub1 = xmldoc.CreateElement("outline");
            xesub1.SetAttribute("text", strText);//设置该节点title属性
            xesub1.SetAttribute("title", strTitle);//设置该节点title属性 --第一层的outline节点的属性表示的是RSS的标签或者说是文件夹
            xesub1.SetAttribute("type", "rss");
            xesub1.SetAttribute("xmlUrl", strXmlUrl);

            xesub1.SetAttribute("htmlUrl", strHtmlUrl);
            xe1.AppendChild(xesub1);//添加到<Node>节点中 
        }
        xeBody.AppendChild(xe1);        //保存创建好的XML文档
        xmldoc.Save(Server.MapPath("RssReader.xml"));

    }