1：利用反射实现
public static t deepcopy<t>(t obj) { //如果是字符串或值类型则直接返回 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; }
2：利用xml序列化和反序列化实现
public t deepcopy<t>(t obj) { object retval; using (memorystream ms = new memorystream()) { xmlserializer xml = new xmlserializer(typeof(t)); xml.serialize(ms, obj); ms.seek(0, seekorigin.begin); retval = xml.deserialize(ms); ms.close(); } return (t)retval; }
3：利用二进制序列化和反序列化实现
public static t deepcopy<t>(t obj) { object retval; using (memorystream ms = new memorystream()) { binaryformatter bf = new binaryformatter(); //序列化成流 bf.serialize(ms, obj); ms.seek(0, seekorigin.begin); //反序列化成对象 retval = bf.deserialize(ms); ms.close(); } return (t)retval; }
4：利用silverlight datacontractserializer实现，用于在silverlight 客户端使用
public static t deepcopy<t>(t obj) { object retval; using (memorystream ms = new memorystream()) { datacontractserializer ser = new datacontractserializer(typeof(t)); ser.writeobject(ms, obj); ms.seek(0, seekorigin.begin); retval = ser.readobject(ms); ms.close(); } return (t)retval;
补充：第一个已经通过递归实现了深拷贝。
更多c#中4种深拷贝方法介绍。