探讨:使用XMLSerialize 序列化与反序列化

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概念：XML序列化是将公共字段和属性转化为序列格式（这里指XML），以便存储或传输的过程。反序列化则是从XML中重新创建原始状态的对象.
代码如下:
    class SerializeDemo
    {
        static void Main()
        {
            EmployeeCollection employeeCollection = new EmployeeCollection()
            {
                Employees = Employeer.Employees()
            };
            XmlSerializer serialize = new XmlSerializer(typeof(EmployeeCollection));
            string filePath = @"E:\PProject\Test\Employee.xml";
             SerializeEmployee(serialize, filePath, employeeCollection);
            DeserializeEmployee(serialize, filePath);
        }
        static void SerializeEmployee(XmlSerializer serialize, string filePath, EmployeeCollection employeeCollection)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
            {
                serialize.Serialize(fs, employeeCollection);
            }
        }
        static void DeserializeEmployee(XmlSerializer serialize,string filePath)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                EmployeeCollection collection = (EmployeeCollection)serialize.Deserialize(fs);
                collection.Employees.ForEach(e => Console.WriteLine("Name:{0},Gender:{1},Age:{2},Education:{3}", e.userName, e.gender, e.age, e.education));
            }
        }
    }
    [Serializable]
    public class EmployeeCollection
    {
        public List<Employeer> Employees { get; set; }
    }
    [Serializable]
    public class Employeer
    {
        public string userId { get; set; }
        public string userName { get; set; }
        public string gender { get; set; }
        public int age { get; set; }
        public List<WorkExperience> workExperience { get; set; }
        public string education { get; set; }
        public static List<Employeer> Employees()
        {
           return new List<Employeer>()
           {
                new Employeer()
                {  
                    userId = "0001",
                    userName = "guoHu",
                    gender="Man",
                    age=25,education="underGraduate",
                    workExperience = WorkExperience.GetWorkExperience("0001")
                }
           };

        }
    }
    [Serializable]
    public class WorkExperience
    {
        public string userId { get; set; }
        public string companyName { get; set; }
        public string seniority { get; set; }

        public static List<WorkExperience> GetWorkExperience(string userId)
        {
            List<WorkExperience> workExperience = new List<WorkExperience>();
            Unity unity = Unity.GetInstance();
            DataTable table = new DataTable();
            unity.GetTable(out table);

            var experiences = (from experience in table.AsEnumerable()
                               where experience.Field<string>("UserId") == userId
                               select new
                               {
                                   companyName = experience.Field<string>("CompanyName"),
                                   seniority = experience.Field<string>("Seniority")
                               }).ToList();
            experiences.ForEach(e => workExperience.Add(new WorkExperience() { companyName = e.companyName, seniority = e.seniority }));
            return workExperience;
        }
    }
    public class Unity
    {
        public static DataTable tables = new DataTable();
        public static DataRow dr;
        public static DataColumn dc = new DataColumn();
        public static object objLock = new object();
        public static Unity unityInstance;
        private Unity()
        {

        }
        public static Unity GetInstance()
        {
            if (unityInstance == null)
            {
                lock (objLock)
                {
                    if (unityInstance == null)
                    {
                        unityInstance = new Unity();
                    }
                }
            }
            return unityInstance;
        }
        public void GetTable(out DataTable dt)
        {
            unityInstance.CreateTable();

            dr = tables.NewRow();
            dr["UserId"] = "0001";
            dr["CompanyName"] = "WireSoft";
            dr["Seniority"] = "2012.02-2012.05";
            tables.Rows.Add(dr);
            dr = tables.NewRow();
            dr["UserId"] = "0001";
            dr["CompanyName"] = "Jin Xun";
            dr["Seniority"] = "2009.07-2011.02";
            tables.Rows.Add(dr);
            dr = tables.NewRow();
            dr["UserId"] = "0002";
            dr["CompanyName"] = "Hua Wei";
            dr["Seniority"] = "2011.07-";
            tables.Rows.Add(dr);
            dt = tables.Copy();
        }
        public  void CreateTable()
        {
            dc = new DataColumn("UserId", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
            dc = new DataColumn("companyName", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
            dc = new DataColumn("seniority", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
        }
    }

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