如何使用XML存储一个简单的对象(C#)

发布时间：2020-12-16 22:38:47 所属栏目：百科来源：网络整理

导读：我一直在使用如下文件来保存数据： field1 field2 field3 field4myname myhashedpass myemail@email.com more stuff afteretc etc etc etc 每行都转换为字符串(名称,通行证,电子邮件) 我想将我的文本文件(见上文)转换为XML文件,如下所示： person1 namemynam

我一直在使用如下文件来保存数据：

field1 field2 field3 field4
myname myhashedpass myemail@email.com more stuff after
etc etc etc etc

每行都转换为字符串(名称,通行证,电子邮件)

我想将我的文本文件(见上文)转换为XML文件,如下所示：

<person1>
   <name>myname</name>
   <pass>myhashedpass</pass>
   <email>etc</email>
</person1>

<person2>
etc etc etc etc

基本上,我坚持如何进行此迁移,并以与处理文本数据相同的方式操纵XML数据

解决方法

对你的问题的回答是这样的：

using System;
using System.Linq;
using System.Xml.Linq;

namespace XmlSerialization
{
    class Program
    {
        static void Main(string[] args)
        {
            var person1 = new Person();
            person1.Name = "Joe";
            person1.Password = "Cla$$ified";
            person1.Email = "none@your.bussiness";

            var person2 = new Person();
            person2.Name = "Doe";
            person2.Name = "$ecret";
            person2.Email = "dont@spam.me";

            var persons = new[] {person1,person2};

            XElement xml = new XElement("persons",from person in persons
                                        select new XElement("person",new XElement("name",person.Name),new XElement("password",person.Password),new XElement("email",person.Email))
                                        );
            xml.Save("persons.xml");

            XElement restored_xml = XElement.Load("persons.xml");
            Person[] restored_persons = (from person in restored_xml.Elements("person")
                                         select new Person
                                                    {
                                                        Name = (string)person.Element("name"),Password = (string)person.Element("password"),Email = (string)person.Element("email")
                                                    })
                                        .ToArray();
            foreach (var person in restored_persons)
            {
                Console.WriteLine(person.ToString());
            }
            Console.ReadLine();
    }
}

public class Person
{
    public string Name { get; set; }
    public string Password { get; set; }
    public string Email { get; set; }
    public override string ToString()
    {
        return string.Format("The person with name {0} has password {1} and email {2}",this.Name,this.Password,this.Email);
    }
}

}

但是,让内置的serializattion类为您进行XML的转换更好.下面的代码需要显式引用System.Runtime.Serialization.dll. using语句本身是不够的：

using System;
using System.IO;
using System.Linq;
using System.Xml.Linq;
using System.Runtime.Serialization;

namespace XmlSerialization
{
    class Program
    {
        static void Main(string[] args)
        {
            var person1 = new Person();
            person1.Name = "Joe";
            person1.Password = "Cla$$ified";
            person1.Email = "none@your.bussiness";

            var person2 = new Person();
            person2.Name = "Doe";
            person2.Name = "$ecret";
            person2.Email = "dont@spam.me";

            var persons = new[] {person1,person2};

            DataContractSerializer serializer=new DataContractSerializer(typeof(Person[]));
            using (var stream = new FileStream("persons.xml",FileMode.Create,FileAccess.Write))
            {
                serializer.WriteObject(stream,persons);
            }

            Person[] restored_persons;
            using (var another_stream=new FileStream("persons.xml",FileMode.Open,FileAccess.Read))
            {
                restored_persons = serializer.ReadObject(another_stream) as Person[];
            }

            foreach (var person in restored_persons)
            {
                Console.WriteLine(person.ToString());
            }
            Console.ReadLine();
        }
    }

    [DataContract]
    public class Person
    {
        [DataMember]
        public string Name { get; set; }
        [DataMember]
        public string Password { get; set; }
        [DataMember]
        public string Email { get; set; }
        public override string ToString()
        {
            return string.Format("The person with name {0} has password {1} and email {2}",this.Email);
        }
    }
}

（编辑：李大同）

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