http://www.cnblogs.com/luckdv/articles/1728088.html?login=1
http://de.cel.blog.163.com/blog/static/5145123620119983945167/
Data.xml:
<Students> <Student Id ="1"> <Name>张三</Name> <Address>张三家地址</Address> </Student> <Student Id ="2"> <Name>李四</Name> <Address>李四家地址</Address> </Student> </Students>
XMLHelper:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Xml.Linq; using StudentManager.Models; namespace StudentManager { public class XmlHelper { private XElement Root; private List<Student> _StuList; public List<Student> StuList { get { return _StuList; } set { _StuList = value; } } string path = HttpRuntime.AppDomainAppPath.ToString() + "App_Data\Data.xml"; public XmlHelper() { Root = Load(); } public XElement Load() { XElement root = XElement.Load(path); return root; } public List<Student> GetAllStudents() { List<Student> list = new List<Student>(); var students = Root.Elements("Student"); foreach (var stu in students) { Student s = new Student(); s.Id = Convert.ToInt32(stu.Attribute("Id").Value); s.Name = stu.Element("Name").Value; s.Address = stu.Element("Address").Value; list.Add(s); } StuList = list; return list; } public Student GetStudentById(int id) { Student stu = new Student(); IEnumerable<XAttribute> es = Root.Elements("Student").Attributes("Id"); //XElement el = es.FirstOrDefault(o => o.Value == id.ToString()).Parent; XElement e = Root.Elements("Student").Single(o => { bool flag = o.Attribute("Id").Value == id.ToString(); if (flag) { stu.Id = Convert.ToInt32(o.Attribute("Id").Value); stu.Name = o.Element("Name").Value; stu.Address = o.Element("Address").Value; } return flag; }); return stu; } public void DeleteStudentById(int id) { XElement t = (from stu in Root.Elements("Student") where stu.Attribute("Id").Value == id.ToString() select stu).Single() as XElement; t.Remove(); Root.Save(path); } public void UpdateStudent(Student stu) { //XElement e = Root.Elements("Student").Single(o => o.Attribute("Id").Value == stu.Id.ToString()); //e.Element("Name").SetValue(stu.Name); //e.Element("Address").SetValue(stu.Address); //e.ReplaceWith(new XElement(stu.Name,stu.Address)); Root.Elements("Student").Single(o => o.Attribute("Id").Value == stu.Id.ToString()) .ReplaceWith(new XElement("Student",new XAttribute("Id",stu.Id), new XElement("Name",stu.Name), new XElement("Address",stu.Address))); Root.Save(path); } public void CreateStudent(Student stu) { int a = GetMaxIndex(); stu.Id = a; XElement e = Root.Elements("Student").Last(); e.AddAfterSelf(new XElement("Student" ,new XAttribute("Id",stu.Id) ,new XElement("Name",stu.Name) ,new XElement("Address",stu.Address))); Root.Save(path); } private int GetMaxIndex() { //int temp = 0; int maxIndex = Root.Elements("Student").Max(o => Convert.ToInt32(o.Attribute("Id").Value)); //Root.Elements("Student").Max((o) => //{ // temp = (int)o.Attribute("Id"); // return temp; //}); return ++maxIndex; } } }