C# 中的序列化与反序列化（二）-白红宇

C# 中的序列化与反序列化（二）

阅读量：5289 次

发布时间：2019-06-14

本文共 5625 字，大约阅读时间需要 18 分钟。

我的前一篇：

直接贴代码了：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using System.Xml;using System.Xml.Serialization;namespace RwConfigDemo{    public static class XmlHelper    {        ///         /// 将一个对象序列化为XML字符串        /// 
        /// 要序列化的对象        /// 编码方式        /// 
     
      序列化产生的XML字符串
             public static string XmlSerialize(object o, Encoding encoding)        {            byte[] bytes = XmlSerializeInternal(o, encoding);            return encoding.GetString(bytes);        }        ///         /// 将一个对象按XML序列化的方式写入到一个文件        /// 
        /// 要序列化的对象        /// 保存文件路径        /// 编码方式        public static void XmlSerializeToFile(object o, string path, Encoding encoding)        {            if( string.IsNullOrEmpty(path) )                throw new ArgumentNullException("path");            byte[] bytes = XmlSerializeInternal(o, encoding);            File.WriteAllBytes(path, bytes);        }        ///         /// 从XML字符串中反序列化对象        /// 
        /// 
     
      结果对象类型
             /// 包含对象的XML字符串        /// 编码方式        /// 
     
      反序列化得到的对象
             public static T XmlDeserialize
     
      (string s, Encoding encoding)        {            if( string.IsNullOrEmpty(s) )                throw new ArgumentNullException("s");            if( encoding == null )                throw new ArgumentNullException("encoding");            XmlSerializer mySerializer = new XmlSerializer(typeof(T));            using( MemoryStream ms = new MemoryStream(encoding.GetBytes(s)) ) {                using( StreamReader sr = new StreamReader(ms, encoding) ) {                    return (T)mySerializer.Deserialize(sr);                }            }        }        /// 
              /// 读入一个文件，并按XML的方式反序列化对象。        /// 
        /// 
      
       结果对象类型
              /// 
      文件路径        /// 
      编码方式        /// 
      
       反序列化得到的对象
              public static T XmlDeserializeFromFile
      
       (string path, Encoding encoding)        {            if( string.IsNullOrEmpty(path) )                throw new ArgumentNullException("path");            if( encoding == null )                throw new ArgumentNullException("encoding");            string xml = File.ReadAllText(path, encoding);            return XmlDeserialize
       
        (xml, encoding);        }        private static byte[] XmlSerializeInternal(object o, Encoding encoding)        {            if (o == null)                throw new ArgumentNullException("o");            if (encoding == null)                throw new ArgumentNullException("encoding");            XmlSerializer ser = new XmlSerializer(o.GetType());            using (MemoryStream ms = new MemoryStream())            {                using (XmlTextWriter writer = new XmlTextWriter(ms, encoding))                {                    writer.Formatting = Formatting.Indented;                    ser.Serialize(writer, o);                    writer.Close();                }                return ms.ToArray();            }        }    }}

代码来源于博客【在.net中读写config文件的各种方法】的示例代码

我的测试代码如下：

using System;using System.Collections.Generic;using System.Text;using RwConfigDemo;using System.IO;namespace FormsAuthClient{    class Program    {        static void Main(string[] args)        {            IList
     
       students = StudentRepository.GetAllStudents();            string xmlString = XmlHelper.XmlSerialize(students, Encoding.UTF8);            Console.WriteLine(xmlString);            string xmlFileName = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, Guid.NewGuid() + ".xml");            XmlHelper.XmlSerializeToFile(students, xmlFileName, Encoding.UTF8);            Student[] studentsFromXmlDeserialize = XmlHelper.XmlDeserialize
      
       (xmlString, Encoding.UTF8);            // 注意这里不能反序列化为 IList
       
        ，可以序列化为 Student[]、List
        
         ，否则会抛出异常：            // 不能序列化接口 IList
         
                      ShowStudent(studentsFromXmlDeserialize);            Console.WriteLine("===================================");            List
          
            studentsXmlDeserializeFromFile = XmlHelper.XmlDeserializeFromFile
           
            
             >(xmlFileName, Encoding.UTF8); ShowStudent(studentsXmlDeserializeFromFile); } static void ShowStudent(IEnumerable
             
               items) { foreach (Student item in items) { Console.WriteLine("ID：" + item.Id + ", Name：" + item.Name + "，DateOfBirth：" + item.DateOfBirth); } } } public class StudentRepository { public static IList
              
                GetAllStudents() { return new Student[] { new Student(){ Id = 1, Name = "张三", DateOfBirth = new DateTime(1985,8,3) }, new Student(){ Id = 2, Name = "李四", DateOfBirth = new DateTime(1986,9,3) }, new Student(){ Id = 3, Name = "王武", DateOfBirth = new DateTime(1987,10,3) }, new Student(){ Id = 4, Name = "赵六", DateOfBirth = new DateTime(1988,11,3) } }; } } public class Student { public int Id { get; set; } public string Name { get; set; } public DateTime DateOfBirth { get; set; } }}

测试结果截图：

序列化产生的 Xml 文件：


     
       
          
       
        1
           
       
        张三
           
       
        1985-08-03T00:00:00
         
        
          
       
        2
           
       
        李四
           
       
        1986-09-03T00:00:00
         
        
          
       
        3
           
       
        王武
           
       
        1987-10-03T00:00:00
         
        
          
       
        4
           
       
        赵六
           
       
        1988-11-03T00:00:00