使用C#生成XML(RSS)的两种方式_.NET_编程开发_程序员俱乐部

使用C#生成XML(RSS)的两种方式：

一、使用XmlWriter创建XML文件：

  1 using System;
  2 
  3 using System.Collections.Generic;
  4 
  5 using System.Text;
  6 
  7 using System.IO;
  8 
  9 using System.Xml;
 10 
 11  
 12 
 13 namespace UseXmlWriter
 14 
 15 {
 16 
 17     class Program
 18 
 19     {
 20 
 21         static void Main(string[] args)
 22 
 23         {
 24 
 25             using (MemoryStream ms = new MemoryStream())
 26 
 27             {
 28 
 29                 XmlWriterSettings settings = new XmlWriterSettings();
 30 
 31                 //要求缩进
 32 
 33                 settings.Indent = true;
 34 
 35                 //注意如果不设置encoding默认将输出utf-16
 36 
 37                 //注意这儿不能直接用Encoding.UTF8如果用Encoding.UTF8将在输出文本的最前面添加4个字节的非xml内容
 38 
 39                 settings.Encoding = new UTF8Encoding(false);
 40 
 41                  
 42 
 43                 //设置换行符
 44 
 45                 settings.NewLineChars = Environment.NewLine;
 46 
 47  
 48 
 49                 using (XmlWriter xmlWriter = XmlWriter.Create(ms, settings))
 50 
 51                 {
 52 
 53  
 54 
 55                     //写xml文件开始<?xml version="1.0" encoding="utf-8" ?>
 56 
 57                     xmlWriter.WriteStartDocument(false);
 58 
 59                     //写根节点
 60 
 61                     xmlWriter.WriteStartElement("root");
 62 
 63                     //写字节点
 64 
 65                     xmlWriter.WriteStartElement("cat");
 66 
 67                     //给节点添加属性
 68 
 69                     xmlWriter.WriteAttributeString("color", "white");
 70 
 71                     //给节点内部添加文本
 72 
 73                     xmlWriter.WriteString("I'm a cat");
 74 
 75                     xmlWriter.WriteEndElement();
 76 
 77  
 78 
 79  
 80 
 81                     //通过WriteElementString可以添加一个节点同时添加节点内容
 82 
 83                     xmlWriter.WriteElementString("pig", "pig is great");
 84 
 85  
 86 
 87  
 88 
 89                     xmlWriter.WriteStartElement("dog");
 90 
 91                     //写CData
 92 
 93                     xmlWriter.WriteCData("<strong>dog is dog</strong>");
 94 
 95                     xmlWriter.WriteEndElement();
 96 
 97      
 98                     //添加注释
 99                     xmlWriter.WriteComment("this is an example writed");
100 
101  
102 
103                     xmlWriter.WriteEndElement();
104 
105                     xmlWriter.WriteEndDocument();
106 
107  
108 
109                 }
110 
111  
112 
113                 //将xml内容输出到控制台中
114 
115                 string xml = Encoding.UTF8.GetString(ms.ToArray());
116 
117                 Console.WriteLine(xml);
118 
119             }
120 
121             Console.Read();
122 
123  
124 
125         }
126 
127     }
128 
129 }        

二、使用Linq To XML创建RSS源文件：

  1 using System;
  2 
  3 
  4 using System.Web;
  5 
  6 
  7 using System.Xml;
  8 
  9 
 10 using System.Xml.Linq;
 11 
 12 
 13 
 14 
 15 namespace WebApplication1
 16 
 17 
 18 {
 19 
 20 
 21     public class RssHttpHandler : IHttpHandler
 22 
 23 
 24     {
 25 
 26 
 27 
 28 
 29         public void ProcessRequest(HttpContext context)
 30 
 31 
 32         {
 33 
 34 
 35             context.Response.ContentType = "text/xml";
 36 
 37 
 38 
 39 
 40             context.Response.Write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
 41 
 42 
 43 
 44 
 45             XElement rssFeed = new XElement("rss", new XAttribute("version", "2.0"));
 46 
 47 
 48 
 49 
 50             string fixedUrl = "http://www.freeflying.com/article";
 51 
 52 
 53             string wholeUrl = string.Empty;
 54 
 55 
 56 
 57 
 58             XElement channel = new XElement("channel",
 59 
 60 
 61                 new XElement("title", "freeflying"),
 62 
 63 
 64                 new XElement("link", fixedUrl),
 65 
 66 
 67                 new XElement("description", "the website for dream flying freely"),
 68 
 69 
 70                 new XElement("pubDate", DateTime.Now.ToString())
 71 
 72 
 73                 );
 74 
 75 
 76 
 77 
 78 
 79 
 80             foreach (var article in Articles.GetArticles())
 81 
 82 
 83             {
 84 
 85 
 86                 XElement item = new XElement("item");
 87 
 88 
 89 
 90 
 91                 XElement title = new XElement("title", article.Title);
 92 
 93 
 94 
 95 
 96                 wholeUrl = string.Format("{0}?id={1}&catelog={2}", fixedUrl, article.ID, article.Catelog);
 97 
 98 
 99                 XElement link = new XElement("link", wholeUrl);
100 
101 
102 
103 
104                 XElement description = new XElement("description", article.Description);
105 
106 
107 
108 
109                 XElement pubDate = new XElement("pubDate", article.LastMod.ToString());
110 
111 
112 
113 
114                 item.Add(title, link, description, pubDate);
115 
116 
117 
118 
119                 channel.Add(item);
120 
121 
122             }
123 
124 
125 
126 
127             rssFeed.Add(channel);
128 
129 
130 
131 
132             context.Response.Write(rssFeed);
133 
134 
135 
136 
137         }
138 
139 
140 
141 
142         public bool IsReusable
143 
144 
145         {
146 
147 
148             get { return false; }
149 
150 
151         }
152 
153 
154     }
155 
156 
157 }