一、创建的第一种方式
//1、创建一个XML文档 XmlDocument doc = new XmlDocument(); //2、创建第一行描述信息 XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null); //3、将创建的第一行描述信息添加到文档中 doc.AppendChild(dec); //4、给文档添加根节点 XmlElement Books = doc.CreateElement("Books"); doc.AppendChild(Books); XmlElement Book = doc.CreateElement("Book"); Books.AppendChild(Book); XmlElement name = doc.CreateElement("name"); name.InnerText = "水浒传"; Book.AppendChild(name); XmlElement author = doc.CreateElement("author"); author.InnerText = "匿名"; author.SetAttribute("name", "wjl"); author.SetAttribute("count", "30"); Book.AppendChild(author); doc.Save("Book.xml"); Console.WriteLine("保存成功!"); Console.ReadKey();
创建结果如下:
二、创建的第二种方式
class Program { static void Main(string[] args) { List<Student> list = new List<Student>(); list.Add(new Student(1, "wjl1", 22, "男")); list.Add(new Student(2, "wjl2", 21, "男")); list.Add(new Student(3, "wjl3", 22, "男")); list.Add(new Student(4, "wjl4", 24, "男")); XmlDocument xmldoc = new XmlDocument(); XmlDeclaration xmldec = xmldoc.CreateXmlDeclaration("1.0", "utf-8", null); xmldoc.AppendChild(xmldec); XmlElement person = xmldoc.CreateElement("Person"); xmldoc.AppendChild(person); for (int i = 0; i < list.Count; i++) { XmlElement stu = xmldoc.CreateElement("student"); stu.SetAttribute("ID", list[i].Id.ToString()); person.AppendChild(stu); XmlElement name = xmldoc.CreateElement("name"); XmlElement age = xmldoc.CreateElement("age"); name.InnerText = list[i].Name; age.InnerText = list[i].Age.ToString(); stu.AppendChild(name); stu.AppendChild(age); } xmldoc.Save("Student.xml"); Console.WriteLine("Student.xml"); Console.ReadKey(); } } class Student { int id; string name; int age; string sex; public Student(int id, string name, int age, string sex) { this.id = id; this.name = name; this.age = age; this.sex = sex; } public Student() { } }
创建结果如下:
三、对XML文件的添加
XmlDocument doc = new XmlDocument(); //首先判断文件是否存在,如果存在则追加否则在创建一个 if (File.Exists("Student.xml")) { //加载 doc.Load("Student.xml"); //获取根节点,给根节点添加子节点 XmlElement person = doc.DocumentElement; XmlElement student = doc.CreateElement("student"); student.SetAttribute("ID", "1"); person.AppendChild(student); XmlElement name = doc.CreateElement("name"); XmlElement age = doc.CreateElement("age"); name.InnerText = "zjs"; age.InnerText = "41"; student.AppendChild(name); student.AppendChild(age); } else { } doc.Save("Student.xml"); Console.WriteLine("Student.xml 保存成功");
四、对XML文档的查询、修改、删除
方法1:
文档结构为:
if (File.Exists("order.xml")) { doc.Load("order.xml"); // 获取根节点 XmlElement orderElement = doc.DocumentElement; XmlNodeList orderChildr = orderElement.ChildNodes; foreach (XmlNode item in orderChildr) { Console.WriteLine("节点名称:"+ item.Name + "节点的 InnerText :" + item.InnerText); } XmlElement orderitem = orderElement["Items"]; XmlNodeList itemlist = orderitem.ChildNodes; foreach (XmlNode item in itemlist) { Console.WriteLine(item.Attributes["Name"].Value + " " + item.Attributes["Count"].Value); } } else { Console.WriteLine("文件不存在!"); } Console.ReadKey(); // doc.Save("Student.xml"); Console.WriteLine("Student.xml 保存成功");
方法2:
#region 使用XPath的方式来读取XML文件 // 获取文档对象 XmlDocument doc = new XmlDocument(); doc.Load("order.xml"); //获取根节点 XmlElement order = doc.DocumentElement; // 获取单个节点 //XmlNode xn = order.SelectSingleNode(@"/Order/CustomerName"); XmlNode xn = order.SelectSingleNode(@"/Order/Items/OrderItem[@Name=‘码表‘]"); xn.Attributes["Count"].Value = "20"; // 修改 doc.Save("Order.xml"); Console.WriteLine(xn.Attributes["Count"].Value); Console.ReadKey(); #endregion
删除元素指定的特性:
xn.Attributes.RemoveNamedItem("Count"); //删除元素指定的特性
删除子节点:
XmlNode xn = order.SelectSingleNode(@"/Order/Items"); XmlNode xnchild = order.SelectSingleNode(@"/Order/Items/OrderItem[@Name = ‘雨衣‘]"); xn.RemoveChild(xnchild); //删除指定的子节点
删除当前所有子节点:
xn.RemoveAll(); //删除当前节点的所有子节点
删除当前节点的所有特性:
xnchild.Attributes.RemoveAll();
原文地址:https://www.cnblogs.com/lonelyxmas/p/8915789.html
时间: 2024-10-12 10:34:43