参考链接:https://www.cnblogs.com/bobositlife/articles/ways-of-deep-cloning-objects-in-csharp.html

.NET[C#]中实现实体对象深拷贝(克隆/复制)的几种方法

.NET[C#]中实现实体对象深拷贝(克隆/复制)的几种方法，总有一种适合你。

方式一 使用二进制流

  1. using System;
  2. using System.IO;
  3. using System.Runtime.Serialization;
  4. using System.Runtime.Serialization.Formatters.Binary;
  5. /// <summary>
  6. /// 参考 http://www.codeproject.com/KB/tips/SerializedObjectCloner.aspx
  7. /// </summary>
  8. public static class ObjectCopier
  9. {
  10.     public static T Clone<T>(T source)
  11.     {
  12.         if (!typeof(T).IsSerializable)
  13.         {
  14.             throw new ArgumentException("The type must be serializable.", "source");
  15.         }
  16.         if (Object.ReferenceEquals(source, null))
  17.         {
  18.             return default(T);
  19.         }
  20.         IFormatter formatter = new BinaryFormatter();
  21.         Stream stream = new MemoryStream();
  22.         using (stream)
  23.         {
  24.             formatter.Serialize(stream, source);
  25.             stream.Seek(0, SeekOrigin.Begin);
  26.             return (T)formatter.Deserialize(stream);
  27.         }
  28.     }
  29. }

方式二 使用序列化与反序列化

  1. public static T CloneJson<T>(this T source)
  2. {            
  3.     if (Object.ReferenceEquals(source, null))
  4.     {
  5.         return default(T);
  6.     }
  7.     var deserializeSettings = new JsonSerializerSettings {ObjectCreationHandling = ObjectCreationHandling.Replace};
  8.     return JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(source), deserializeSettings);
  9. }

方式三 使用反射

  1. public static T DeepCopyByReflect<T>(T obj)
  2. {
  3.     //如果是字符串或值类型则直接返回
  4.     if (obj is string || obj.GetType().IsValueType) return obj;
  5.     object retval = Activator.CreateInstance(obj.GetType());
  6.     FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
  7.     foreach (FieldInfo field in fields)
  8.     {
  9.         try { field.SetValue(retval, DeepCopyByReflect(field.GetValue(obj))); }
  10.         catch { }
  11.     }
  12.     return (T)retval;
  13. }

方式四 使用XML序列化与反序列化

  1. public static T DeserializeXML<T>(string xmlData) where T:new()
  2.     {
  3.         if (string.IsNullOrEmpty(xmlData))
  4.             return default(T);
  5.         TextReader tr = new StringReader(xmlData);
  6.         T DocItms = new T();
  7.         XmlSerializer xms = new XmlSerializer(DocItms.GetType());
  8.         DocItms = (T)xms.Deserialize(tr);
  9.         return DocItms == null ? default(T) : DocItms;
  10.     }

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