XML XSD XPathNavigator

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Schema;
using System.Xml.XPath;
namespace XmlDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            AddXPathDocument();
            Console.ReadKey();
        }
        //加载xml
        public static void ReadXml()
        {
            XmlReader read = XmlReader.Create(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            while (!read.EOF)
            {
                if (read.Name == "title")
                {
                    Console.WriteLine(read.ReadString());

                    read.Read();
                }
                else
                {
                    read.Read();
                }

            }
        }

        /// <summary>
        /// 用XSD文件验证xml格式是是否是自己的要的格式
        /// </summary>
        public static void CheckingXml()
        {
            XmlReaderSettings settings = new XmlReaderSettings();
            settings.Schemas.Add(null, @"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xsd");
            settings.ValidationType = ValidationType.Schema;
            settings.ValidationEventHandler +=
                new System.Xml.Schema.ValidationEventHandler(Sample);
            XmlReader read = XmlReader.Create(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml", settings);
            while (read.Read())
            {
                Console.WriteLine(read.Name);
            }
        }
        public static void Sample(object sender, ValidationEventArgs e)
        {
            Console.WriteLine("错误");
        }
        /// <summary>
        /// 根据XSD格式添加xml
        /// </summary>
        public static void CheckingWriter()
        {
            XmlWriterSettings setting = new XmlWriterSettings();
            setting.Indent = true;
            setting.NewLineOnAttributes = true;
            XmlWriter writer = XmlWriter.Create(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml", setting);
            writer.WriteStartElement("book");
            writer.WriteAttributeString("genre", "Mystery");
            writer.WriteAttributeString("publicationdate", "2001");
            writer.WriteAttributeString("ISBN", "123456789");
            writer.WriteElementString("title", "Case of the Missing Cookie");
            writer.WriteStartElement("author");
            writer.WriteElementString("name", "Cookie Monster");
            writer.WriteEndElement();
            writer.WriteElementString("price", "9.999");
            writer.WriteEndElement();
            writer.WriteEndDocument();
            //clean up
            writer.Flush();
            writer.Close();
        }

        public static void GetXmlDocument()
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            XmlNodeList nodeList = doc.GetElementsByTagName("title");
            
            foreach (XmlNode n in nodeList)
            {
                Console.WriteLine(n.OuterXml);
            }
            doc.SelectNodes("/bookstore/book/title");
        }

        public static void AddXmlDocument()
        {
            XmlDocument _doc = new XmlDocument();
            _doc.Load(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            XmlElement newBook = _doc.CreateElement("book");
            //set some attributes
            newBook.SetAttribute("genre", "Mystery");
            newBook.SetAttribute("publicationdate", "2001");
            newBook.SetAttribute("ISBN", "123456789");
            //create a new 'title' element
            XmlElement newTitle = _doc.CreateElement("title");
            newTitle.InnerText = "Case of the Missing Cookie";
            newBook.AppendChild(newTitle);
            //create new author element
            XmlElement newAuthor = _doc.CreateElement("author");
            newBook.AppendChild(newAuthor);
            //create new name element
            XmlElement newName = _doc.CreateElement("name");
            newName.InnerText = "Cookie Monster";
            newAuthor.AppendChild(newName);
            //create new price element
            XmlElement newPrice = _doc.CreateElement("price");
            newPrice.InnerText = "9.95010";
            newBook.AppendChild(newPrice);
            //add to the current document
            _doc.DocumentElement.AppendChild(newBook);
            //write out the doc to disk

            //_doc.Save(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            XmlTextWriter tr = new XmlTextWriter(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml", null);
            tr.Formatting = Formatting.Indented;
            _doc.WriteContentTo(tr);
            tr.Close();
        }

        /// <summary>
        /// XPathDocument创建只能只读
        /// </summary>
        public static void GetXPathDocunment()
        {
            XPathDocument doc = new XPathDocument(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            XPathNavigator nav = ((IXPathNavigable)doc).CreateNavigator();
            XPathNodeIterator iter = nav.Select("/bookstore/book[@genre='novel']");
            while (iter.MoveNext())
            {
                XPathNodeIterator newIter = iter.Current.SelectDescendants(XPathNodeType.Element,false);

                Console.WriteLine(iter.Current.Name);
                while (newIter.MoveNext())
                {
                    Console.WriteLine(newIter.Current.Name);
                }
               
            }
            Console.WriteLine("price{0}",nav.Evaluate("sum(/bookstore/book/price)"));
        }

        public static void AddXPathDocument()
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
            XPathNavigator nav = doc.CreateNavigator();
            if (nav.CanEdit)
            {
                XPathNodeIterator iter = nav.Select("/bookstore/book/price");
                while (iter.MoveNext())
                {
                    iter.Current.InsertAfter("<disc>5</disc>");
                }
            }
            doc.Save(@"D:\users\c19102989\documents\visual studio 2010\projects\XmlDemo\XmlDemo\Xml\books.xml");
        }
    }
}

 _doc.CreateXmlDeclaration("1.0",null,null);//创建xml的头

XSD验证xml格式