认识XmlReader

1 XmlReaderSettings settings = new XmlReaderSettings();
2 settings.ConformanceLevel = ConformanceLevel.Fragment;
3 settings.IgnoreWhitespace = true;
4 settings.IgnoreComments = true;
5 XmlReader reader = XmlReader.Create("books.xml", settings);

1 // Create a resolver with default credentials.
2 XmlUrlResolver resolver = new XmlUrlResolver();
3 resolver.Credentials = System.Net.CredentialCache.DefaultCredentials;
4   
5 // Set the reader settings object to use the resolver.
6 settings.XmlResolver = resolver;
7 
8 // Create the XmlReader object.
9 XmlReader reader = XmlReader.Create("http://ServerName/data/books.xml", settings);

 1 reader.MoveToContent();
 2   // Parse the file and display each of the nodes.
 3   while (reader.Read()) {
 4     switch (reader.NodeType) {
 5       case XmlNodeType.Element:
 6           Console.Write("<{0}>", reader.Name);
 7           break;
 8       case XmlNodeType.Text:
 9           Console.Write(reader.Value);
10           break;
11        case XmlNodeType.CDATA:
12            Console.Write("<![CDATA[{0}]]>", reader.Value);
13            break;
14        case XmlNodeType.ProcessingInstruction:
15            Console.Write("<?{0} {1}?>", reader.Name, reader.Value);
16            break;
17        case XmlNodeType.Comment:
18            Console.Write("<!--{0}-->", reader.Value);
19            break;
20        case XmlNodeType.XmlDeclaration:
21            Console.Write("<?xml version='1.0'?>");
22            break;
23        case XmlNodeType.Document:
24            break;
25        case XmlNodeType.DocumentType:
26            Console.Write("<!DOCTYPE {0} [{1}]", reader.Name, reader.Value);
27            break;
28        case XmlNodeType.EntityReference:
29            Console.Write(reader.Name);
30            break;
31        case XmlNodeType.EndElement:
32            Console.Write("</{0}>", reader.Name);
33            break;
34    } 
35 }

 1 using (XmlReader reader = XmlReader.Create("book3.xml")) {
 2 
 3   // Parse the XML document.  ReadString is used to 
 4 // read the text content of the elements.
 5   reader.Read(); 
 6   reader.ReadStartElement("book");  
 7   reader.ReadStartElement("title");   
 8   Console.Write("The content of the title element:  ");
 9   Console.WriteLine(reader.ReadString());
10   reader.ReadEndElement();
11   reader.ReadStartElement("price");
12   Console.Write("The content of the price element:  ");
13   Console.WriteLine(reader.ReadString());
14   reader.ReadEndElement();
15   reader.ReadEndElement();
16 
17 }

1 // Display all attributes.
2 if (reader.HasAttributes) {
3   Console.WriteLine("Attributes of <" + reader.Name + ">");
4   for (int i = 0; i < reader.AttributeCount; i++) {
5     Console.WriteLine("  {0}", reader[i]);
6   }
7   // Move the reader back to the element node.
8   reader.MoveToElement(); 
9 }

1 if (reader.HasAttributes) {
2   Console.WriteLine("Attributes of <" + reader.Name + ">");
3   while (reader.MoveToNextAttribute()) {
4     Console.WriteLine(" {0}={1}", reader.Name, reader.Value);
5   }
6   // Move the reader back to the element node.
7   reader.MoveToElement();
8 }

1 reader.ReadToFollowing("book");
2 string isbn = reader.GetAttribute("ISBN");
3 Console.WriteLine("The ISBN value: " + isbn);

 1 <?xml version="1.0" encoding="utf-8" ?> 
 2 <breakfast_menu>
 3 <food>
 4   <name>Belgian Waffles</name> 
 5   <price>$5.95</price> 
 6   <description>two of our famous Belgian Waffles with plenty of real maple syrup</description> 
 7   <calories>650</calories> 
 8   </food>
 9  <food>
10   <name>Strawberry Belgian Waffles</name> 
11   <price>$7.95</price> 
12   <description>light Belgian waffles covered with strawberries and whipped cream</description> 
13   <calories>900</calories> 
14   </food>
15   </breakfast_menu>

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Xml;
 6 
 7 namespace myXmlReader
 8 {
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             XmlReader reader = XmlReader.Create(@"E:\kemi\CodeNow\Project\XmlReader\food.xml");//创建XmlReader实例
14           
15             while (reader.Read())
16             {
17                 if (reader.NodeType.Equals(XmlNodeType.Element))//判断节点类型
18                 {
19                     switch (reader.Name)
20                     {
21 
22                         case "breakfast_menu":
23                             Console.WriteLine("===========breakfast menu==========");
24                             break;
25                         case "name":
26                             Console.WriteLine("Name:{0}", reader.ReadString());//使用ReadString读取数据
27                             break;
28                         case "price":
29                             Console.WriteLine("Price:{0}", reader.ReadString());
30                             break;
31                         case "description":
32                             Console.WriteLine("Description:{0}", reader.ReadInnerXml());//使用ReadInnerXml读取数据
33                             break;
34                         case "calories":
35                             Console.WriteLine("Description:{0}", reader.ReadInnerXml());
36                             break;
37                         default:
38                             Console.WriteLine("");
39                             break;
40                     }
41                 }
42             }
43 
44             Console.Read();
45         }
46     }
47 }