Windows Mobile

开发平台：
Windows_Unix

Rss.cs：源码内容
							﻿/****************************************************************
 ** 文件名:Rss.cs
 ** 创建人:李万龙
 ** 联  系:shenlongju@hotmail.com
 ** 日  期:2008-05-05
 ** 描  述:Rss对象操作
 ** 修改人:
 ** 日  期:
 ** 描  述:
 ** 版  本:1.0.0.0
 ** Copyright (c) 2007-2008 3ESoft
******************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;
using System.Xml.Serialization;
using System.Windows.Forms;
namespace _3ESoft.WindowsMobile.RSS
{
    /// <summary>
    /// Rss操作类
    /// </summary>
    public class Rss
    {
        /// <summary>
        /// RSS列表
        /// </summary>
        public List<RssNews> RssNewsList { set; get; }
        /// <summary>
        /// 更新最新新闻
        /// </summary>
        /// <param name="RSSUrl">RSS地址</param>
        internal void UpdateRssNews(string RSSUrl)
        {
            object obj = new object();
            lock (obj)
            {
                XmlDocument XmlRSS = new XmlDocument();
                try
                {
                    XmlRSS.Load(RSSUrl);
                    XmlNodeList NodeList;
                    NodeList = XmlRSS.SelectNodes("//item");
                    RssNewsList = new List<RssNews>();
                   
                    foreach (XmlNode node in NodeList)
                    {
                        if (node["title"] == null)//没有title标记，不是合法的
                            continue;
                        //是否已经存在了，有则跳过
                        string title = node["title"].InnerText;
                        bool having = false;
                        foreach (RssNews news in RssNewsList)
                        {
                            if (news.Title == title)
                            {
                                having = true;
                                break;
                            }
                        }
                        if (having)
                            continue;
                        RssNews MyRssNews = new RssNews();
                        #region 获取RSS属性,有待改善
                        
                        MyRssNews.Title = node["title"].InnerText;
                        
                        if (node["author"] != null)
                        {
                            MyRssNews.Author = node["author"].InnerText;
                        }
                        else if (node["dc:creator"]!=null)
                            MyRssNews.Author = node["dc:creator"].InnerText;
                        if (node["category"] != null)
                        {
                            MyRssNews.Category = node["category"].InnerText;
                        }
                      
                        if (node["description"] != null)
                        {
                            MyRssNews.Description = node["description"].InnerText;
                        }
                        else
                        {
                            MyRssNews.Description = MyRssNews.Title;
                        }
                        if (node["link"] != null)
                        {
                            MyRssNews.Link = node["link"].InnerText;
                        }
                        if (node["pubDate"] != null)
                        {
                            MyRssNews.PubDate = Convert.ToDateTime( node["pubDate"].InnerText).ToString("yy-MM-dd hh:mm");
                        }
                        #endregion
                        MyRssNews.IsRead = false;
                        RssNewsList.Add(MyRssNews);
                    }
                    SaveRssNews(Global.FormatUrl(RSSUrl));
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                }
            }
        }
        
        /// <summary>
        /// 保存新闻文件
        /// </summary>
        /// <param name="FilePath"></param>
        internal void SaveRssNews(string FilePath)
        {
            Stream fs = new FileStream(FilePath, FileMode.Create);
            
            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(List<RssNews>));
                serializer.Serialize(fs, RssNewsList);
                
            }
            catch (XmlException e)
            {
                MessageBox.Show(e.Message);
            }
            finally
            {
                fs.Close();
            }
        }
        /// <summary>
        /// 本地读取新闻列表
        /// </summary>
        /// <param name="FilePath"></param>
        internal void GetRssNewsList(string FilePath)
        {
            if (!File.Exists(FilePath))
            {
                //MessageBox.Show("首次更新");
                return;
            }
            FileStream fs = new FileStream(FilePath, FileMode.Open);
            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(List<RssNews>));
                RssNewsList = (List<RssNews>)serializer.Deserialize(fs);
                
            }
            catch (XmlException e)
            {
                MessageBox.Show(e.Message);
            }
            finally
            {
                fs.Close();
            }
        }
    }
}

						