用XmlTextReader处理Xml字符串

XmlTextReader是类似于SAX的基于流的Xml读取器，与SAX不同的是，SAX采取的是push model推模式，XmlTextReader采用的是pull model，所以XmlTextReader使程序开发者更能选择性处理数据。下面一个简单的例子：

 1string xmlStr = "<?xml version=\"1.0\" encoding=\"utf-8\" ?><Books><Book SN=\"1000\" Name=\".Net\" /><Book SN=\"2000\" Name=\"Java\"/></Books>";
 2
 3            StringBuilder sb = new StringBuilder();
 4
 5            using (XmlReader xmlReader = XmlTextReader.Create(new StringReader(xmlStr)))
 6            {
 7                while (xmlReader.Read())
 8                {
 9                    switch (xmlReader.NodeType)
                    {
                        case XmlNodeType.Element:
                            if (xmlReader.Name == "Book")
                            {
                                if (xmlReader.HasAttributes)
                                {
                                    if (xmlReader.MoveToAttribute("SN"))
                                    {
                                        sb.Append(xmlReader.ReadContentAsInt());
                                    }
                                    if (xmlReader.MoveToAttribute("Name"))
                                    {
                                        sb.AppendFormat(" {0}", xmlReader.ReadContentAsString());
                                    }

                                    sb.Append("\r\n");
                                }
                            }
                            break;
                    }
                }
            }

            Console.WriteLine(sb.ToString());

            Console.ReadLine();