[TwitterFeed-Widget for BlogEngine.NET](http://twitterfeedwidget.codeplex.com/) | 这是在上面那些代码的基础上修改的一个codeplex开源项目，稍微优化了一下，其实读下来差不多。  

[twitter api 中文文档](http://www.54chen.com/c/591) | twitter api的翻译，来自陈臻（@54chen）。

<asp:HyperLink runat="server" ID="hlTwitterAccount" Text="Follow me on Twitter" rel="me" />
<asp:Repeater runat="server" ID="repItems" OnItemDataBound="repItems_ItemDataBound">
    <ItemTemplate>
        <img src="twitter.ico" alt="Twitter" />
        <asp:Label runat="server" ID="lblDate" style="color:gray" /><br />
        <asp:Label runat="server" ID="lblItem" /><br /><br />
    </ItemTemplate>
</asp:Repeater>

using System;
using System.Configuration;
using System.Data;
using System.Xml;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Collections.Specialized;
using System.Collections.Generic;
using System.Net;
using System.Globalization;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ShowTweets();
    }
    private static DateTime LastModified = DateTime.MinValue;
    private const string CACHE_KEY = "twits";
    private void ShowTweets()
    {
        //用户名
        string _username = "arthraim";
        //用户的twitter地址
        string _url = "http://twitter.com/" + _username + "/";
        //FEED地址（user_timeline为自己的，可以根据需要修改）
        string _feedurl = "http://twitter.com/statuses/user_timeline/" + _username + ".rss";
        //显示的最大条目数
        int maxItems = 30;
        hlTwitterAccount.NavigateUrl = _url;
        if (_feedurl != null)
        {
            if (HttpRuntime.Cache[CACHE_KEY] != null)
            {
                string xml = (string)HttpRuntime.Cache[CACHE_KEY];
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(xml);
                BindFeed(doc, maxItems);
            }
            if (DateTime.Now > LastModified.AddMinutes(15))
            {
                LastModified = DateTime.Now;
                BeginGetFeed(_feedurl);
            }
        }
    }
    protected void repItems_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        Label text = (Label)e.Item.FindControl("lblItem");
        Label date = (Label)e.Item.FindControl("lblDate");
        Twit twit = (Twit)e.Item.DataItem;
        text.Text = twit.Title;
        date.Text = twit.PubDate.ToString("MMMM d. HH:mm");
    }
    private void BeginGetFeed(string url)
    {
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
        request.Credentials = CredentialCache.DefaultNetworkCredentials;
        request.BeginGetResponse(EndGetResponse, request);
    }
    private void EndGetResponse(IAsyncResult result)
        {
        HttpWebRequest request = (HttpWebRequest)result.AsyncState;
        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(response.GetResponseStream());
            HttpRuntime.Cache[CACHE_KEY] = doc.OuterXml;
        }
    }
    private void BindFeed(XmlDocument doc, int maxItems)
    {
        XmlNodeList items = doc.SelectNodes("//channel/item");
        List<Twit> twits = new List<Twit>();
        int count = 0;
        for (int i = 0; i < items.Count; i++)
        {
            if (count == maxItems)
                break;
            XmlNode node = items[i];
            Twit twit = new Twit();
            string title = node.SelectSingleNode("description").InnerText;
            if (title.Contains("@"))
                continue;
            if (title.Contains(":"))
            {
                int start = title.IndexOf(":") + 1;
                title = title.Substring(start);
            }
            twit.Title = ResolveLinks(title);
            twit.PubDate = DateTime.Parse(node.SelectSingleNode("pubDate").InnerText, CultureInfo.InvariantCulture);
            twit.Url = new Uri(node.SelectSingleNode("link").InnerText, UriKind.Absolute);
            twits.Add(twit);
            count++;
        }
        twits.Sort();
        repItems.DataSource = twits;
        repItems.DataBind();
    }
    private static readonly Regex regex = new Regex("((http://|https://|www\.)([A-Z0-9.\-]{1,})\.[0-9A-Z?;~&\(\)#,=\-_\./\+]{2,})", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    private const string link = "<a href="{0}{1}" rel="nofollow">{1}</a>";
    /// <summary>
    /// The event handler that is triggered every time a comment is served to a client.
    /// </summary>
    private string ResolveLinks(string body)
    {
        CultureInfo info = CultureInfo.InvariantCulture;
        foreach (Match match in regex.Matches(body))
        {
            if (!match.Value.Contains("://"))
            {
                body = body.Replace(match.Value, string.Format(info, link, "http://", match.Value));
            }
            else
            {
                body = body.Replace(match.Value, string.Format(info, link, string.Empty, match.Value));
            }
        }
        return body;
    }
    private struct Twit : IComparable<Twit>
    {
        public string Title;
        public Uri Url;
        public DateTime PubDate;
        public int CompareTo(Twit other)
        {
            return other.PubDate.CompareTo(this.PubDate);
        }
    }
}