探讨:使用XMLSerialize 序列化与反序列化

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.

    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);
        }
    }