Sample code for C # Read and write XML

This paper mainly introduces the knowledge of C # reading and writing XML, which has a good reference value. Let's take a look at the little series.

Read XML

XmlDocument xd = new XmlDocument ();       String fileName = @ "D:\test.xml";      Xd. Load (fileName);      XmlNodeList xmlnotelist = xd. getElementsByTagName ("user");      list<user> users = new list<user> ();           foreach (XmlElement item in xmlnotelist)      {        User user = new User ();        User. Id = Int. Parse (item. GetAttribute ("id"));        XmlNodeList XNL = Item. ChildNodes;        User. Name = xnl[0]. InnerXml;        User. Age =int. Parse (Xnl[1]. INNERXML);        User. Gender = xnl[2]. InnerXml;        Users. ADD (user);      }      foreach (var item in users)      {        Console.WriteLine (item);      } Read XML

<?xml version= "1.0" encoding= "gb2312"?><users> <user  id= ' 1 ' >    <name > Zhang San </name >    <age>15</age>    <gender> men </gender>  </user>  <user id= ' 2 ' >    <name> John Doe </name>    <age>14</age>    <gender> men </gender>  </ User></users>test.xml

Write XML

String FileName =@ "D:\test.xml";      XmlDocument xmldoc = new XmlDocument ();      XmlNode Header = xmldoc.createxmldeclaration ("1.0", "Utf-8", null);      Xmldoc.appendchild (header);      Create a first-level node XmlElement RootNode = Xmldoc.createelement ("users");      list<user> list = Getusers ();        foreach (var item in list) {XmlElement xn = inseruser (item,xmldoc);      Rootnode.appendchild (xn);      } xmldoc.appendchild (RootNode);    Xmldoc.save (FileName); }///<summary>//Create an entire user element///</summary>//<param name= "user" ></param>// <param name= "xmldoc" ></param>//<returns></returns> private static XmlElement Inseruser (Us      Er user, XmlDocument xmldoc) {XmlElement xn = xmldoc.createelement ("user"); Xn. SetAttribute ("id", user.)      Id + ""); Xn. AppendChild (Getxmlnode (xmldoc, "name", user.      Name)); Xn. AppendChild (Getxmlnode (xmldoc, "age", user.      Age + "")); Xn. AppendChild(Getxmlnode (xmldoc, "Gender", user.)      Gender));    return xn; } private static XmlElement Getxmlnode (XmlDocument xmldoc,string name,string value) {XmlElement xn = xmldoc.cr      Eateelement (name); Xn.      InnerText = value;    return xn;      } private static List<user> getusers () {list<user> List = new list<user> ();        for (int i = 0; i < i++) {User user = new User (); User.        Id = i; User.        Name = "name" + i; User.        age = 15; User.        Gender = "male"; List.      ADD (user);    } return list; }write XML

Entity class

Class User  {public    int Id {set; get;}    public string Name {get; set;}    public int Age {get; set;}    public string Gender {set; get;}    public override string ToString ()    {      return Id + "," +name + "," +age+ "," + Gender;    }  } Entity