using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml;

using System.IO;

namespace WriteXml

{

class Program

{

static void Main(string[] args)

{

//createXml();//建立檔案和新增基本資料，便於之後操作實驗

//addItem();//追加資料

readtext();//讀取資料

//updatexml();//更新資料

}

private static void createXml()

{

XmlTextWriter writer = new XmlTextWriter("titles.xml", null);

//使用自動縮排便於閱讀

writer.Formatting = Formatting.Indented;

//寫入根元素

writer.WriteStartElement("items");

writer.WriteStartElement("item");

//寫入屬性及屬性的名字

writer.WriteAttributeString("類別", "文學");

writer.WriteAttributeString("品質", "優");

//加入子元素

writer.WriteElementString("title", "毛著");

writer.WriteElementString("author", "毛澤東");

writer.WriteElementString("price", "10.0");

//關閉根元素，並書寫結束標籤

writer.WriteEndElement();

writer.WriteEndElement();

//將XML寫入檔案並且關閉XmlTextWriter

writer.Close();

}

private static void addItem()

{

XmlDocument xmlDoc = new XmlDocument();

xmlDoc.Load("titles.xml");

XmlNode root = xmlDoc.SelectSingleNode("items");

XmlElement xe1 = xmlDoc.createElement_x("item");

xe1.SetAttribute("類別", "張三");

xe1.SetAttribute("品質", "老師");

XmlElement xmlsub1 = xmlDoc.createElement_x("title");

xmlsub1.InnerText = "wahahha";

xe1.AppendChild(xmlsub1);

XmlElement xmlsub2 = xmlDoc.createElement_x("author");

xmlsub2.InnerText = "三毛";

xe1.AppendChild(xmlsub2);

XmlElement xmlsub3 = xmlDoc.createElement_x("Price");

xmlsub3.InnerText = "15.00";

xe1.AppendChild(xmlsub3);

root.AppendChild(xe1);

xmlDoc.Save("titles.xml");

}

private static void readtext()

{

XmlDocument xmlDoc = new XmlDocument();

xmlDoc.Load("titles.xml");

XmlNode xn = xmlDoc.SelectSingleNode("items");

XmlNodeList xnl=xn.ChildNodes;

foreach (XmlNode xnf in xnl)

{

XmlElement xe = (XmlElement)xnf;

Console.Write("類別 "+xe.GetAttribute("類別")+" 品質 ");//顯示屬性值

Console.WriteLine(xe.GetAttribute("品質"));

XmlNodeList xnf1 = xe.ChildNodes;

foreach (XmlNode xn2 in xnf1)

{

Console.WriteLine(xn2.InnerText);//顯示子節點點文字

}

Console.WriteLine();

}

}

private static void updatexml()

{

XmlDocument xmlDoc = new XmlDocument();

xmlDoc.Load("titles.xml");

XmlNode xns = xmlDoc.SelectSingleNode("items");

XmlNodeList xnl = xns.ChildNodes;

foreach (XmlNode xn in xnl)

{

XmlElement xe = (XmlElement)xn;

if (xe.GetAttribute("類別") == "文學")

{

xe.SetAttribute("類別","娛樂") ;

}

else

{

xe.SetAttribute("類別", "文學");

}

XmlNodeList xnl2 = xe.ChildNodes;

foreach (XmlNode xn2 in xnl2)

{

XmlElement xe2 = (XmlElement)xn2;

if (xe2.Name=="price")

{

if (xe2.InnerText == "10.00")

xe2.InnerText = "15.00";

else

xe2.InnerText = "10.00";

}

//break;

}

//break;

}

xmlDoc.Save("titles.xml");

Console.WriteLine();

Console.WriteLine();

Console.WriteLine();

Console.WriteLine();

readtext();

}

private static void delnode()

{

XmlDocument xmlDoc = new XmlDocument();

xmlDoc.Load("titles.xml");

XmlNodeList xnl = xmlDoc.SelectSingleNode("items").ChildNodes;

foreach (XmlNode xn in xnl)

{

XmlElement xe = (XmlElement)xn;

if (xe.GetAttribute("類別") == "文學")

{

}

else if (xe.GetAttribute("類別") == "娛樂")

{

}

}

xmlDoc.Save("titles.xml");

Console.WriteLine();

Console.WriteLine();

Console.WriteLine();

Console.WriteLine();

readtext();

}

}

}