關于C#的深拷貝的實現方式:
①反射
②反序列化
③表達式樹
目前只講解利用反射實現C#深拷貝的方法:
深拷貝工具類:
using System; using System.Collections.Generic; using System.Linq; using System.Reflection; using System.Text; namespace CopyDemo { public sealed class CopyTools { public static T DeepCopy<T>(T obj) { //如果是字符串或值類型則直接返回 if (obj is string || obj.GetType().IsValueType) return obj; object retval = Activator.CreateInstance(obj.GetType()); FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static); foreach (FieldInfo field in fields) { try { field.SetValue(retval, DeepCopy(field.GetValue(obj))); } catch { } } return (T)retval; } } }
下面2個類用于測試:
寵物類->
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CopyDemo { public sealed class Pet { public string Name { get; set; } } }
人物類->
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CopyDemo { public sealed class People { public string Name { set; get; } public Pet My_Pet { get; set; } } }
測試代碼:
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CopyDemo { public class Program { static void Main(string[] args) { People A = new People() {My_Pet = new Pet()}; A.Name = "Aonaufly"; A.My_Pet.Name = "小白"; Console.WriteLine("================================================="); People _copyA = CopyTools.DeepCopy<People>(A); _copyA.Name = "Kayer"; _copyA.My_Pet.Name = "旺財"; Console.WriteLine("源 name : {0} , petName : {1}" , A.Name,A.My_Pet.Name); Console.WriteLine("Copy name : {0} , petName : {1}", _copyA.Name, _copyA.My_Pet.Name); Console.ReadKey(); } } }
運行結果:
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