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c# 對象的深拷備

mes blank typeof person 技術分享 using flags format inf

C# 引用類型對象在拷備時,一般有淺拷備與深拷備,淺拷備指向的是同一對象的引用地址,一個對象的修改必然會影響另一個對象,而深拷備是直接拷備對象的內容,而不是引用,拷備後的對象擁有新的引用,這裏主要介紹深拷備的實現,其實現 方式有3種,好了直接上代碼:

1. 首先定義一個類:

using System;
using System.IO;
namespace DemonCol
{
    [Serializable]  // 可序列化標記
   public  class Person
    {
        public int Age { get; set; }
        public string Name { get; set; }
        public  FileMode  MyFileMode { get; set; }
    }
}

2. 定義深拷備方法

方法1: 通過序列化與反序列化實現深拷備

需要添加的引用: using System.Runtime.Serialization.Formatters.Binary; using System.IO; using System.Runtime.Serialization;

Person 類的頭部必須添加標記: [Serializable]

        /// <summary>
        ///  通過序列化與反序列化實現深拷備 
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static T DeepCopyBySerialize<T>(T obj)
        {
            object returnObj;
            using (MemoryStream ms = new MemoryStream())
            {
                IFormatter formatter = new BinaryFormatter();
                formatter.Serialize(ms, obj);
                ms.Seek(0, SeekOrigin.Begin);
                returnObj = formatter.Deserialize(ms);
                ms.Close();
            }
            return (T)returnObj;
        }

方法2: 通過 XML 序列化與反序列化實現 深拷備

需要添加的引用: using System.Xml.Serialization;

Person 類的頭部可不用 標記:[Serializable]

        /// <summary>
        /// 通過 XML  序列化與反序列化實現 深拷備
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static T DeepCopyByXmlSerialize<T>(T obj)
        {
            object returnObj;
            using (MemoryStream ms = new MemoryStream())
            {
                XmlSerializer xs = new XmlSerializer(typeof(T));
                xs.Serialize(ms, obj);
                ms.Seek(0, SeekOrigin.Begin);
                returnObj = xs.Deserialize(ms);
                ms.Close();
            }
            return (T)returnObj;
        }

方法3: 通過 反射實現 深拷備

需要添加的引用: using System.Reflection;

Person 類的頭部 可不用 標記:[Serializable]

         /// <summary>
        /// 通過 反射實現 深拷備
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static T DeepCopyByReflection<T>(T obj)
        {
            if (obj is string || obj.GetType().IsValueType)
                return obj;
            object returnObj = Activator.CreateInstance(obj.GetType());
            FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
            foreach (FieldInfo item in fields)
            {
                try
                {
                    item.SetValue(returnObj, DeepCopyByReflection(item.GetValue(obj)));
                }
                catch { }
            }
            return (T)returnObj;
        }

3. 客戶端測試

        static void Main(string[] args)
        {
            Person person = new Person();
            person.Age = 20;
            person.Name = "will";
            person.MyFileMode = FileMode.Create;

            Person person2 = person;
            Person person3 = DeepCopyBySerialize<Person>(person);

            person.Name = "modify";
            person.Age = 10;
            person.MyFileMode = FileMode.Open;
Console.ReadKey(); }

運行結果:

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參考文章: http://www.jb51.net/article/67992.htm

c# 對象的深拷備