自定义序列化 ISerializable 的实现

最新推荐文章于 2025-04-28 10:28:00 发布

HeavensDoor

最新推荐文章于 2025-04-28 10:28:00 发布

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本文详细介绍了如何在C#中实现自定义序列化，特别是当类继承自实现了ISerializable接口的基类时。示例代码展示了如何在`TestObject`类中处理序列化和反序列化过程，包括使用`SerializationInfo`和`StreamingContext`，以及处理基类的序列化成员。

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    [Serializable]
    public class BaseObject
    {
        [OptionalField]
        private string _str = "I am BaseObject";
    }

[Serializable]
public class TestObject : BaseObject, ISerializable

{
int a;

string strName = "";

Color c = Color.Red;

DataTable _dtColors = null;

[OptionalField]
ArrayList list = new ArrayList();

[OptionalField]
List<int> list1 = new List<int>();

[OptionalField]
Dictionary<int, string> dic = new Dictionary<int, string>();

//当实现ISerializable接口时，如果该构造函数不存在，则会引发一个SerializationException异常

//该特性表示，该方法只允许序列化器调

        [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]
        protected TestObject(SerializationInfo info, StreamingContext context)
        {

#region 如果基类也实现了ISerializable接口，则序列化器会自动调用基类的该构造函数，就不需要本段代码

Type basetype = this.GetType().BaseType;
MemberInfo[] mi = FormatterServices.GetSerializableMembers(basetype, context);

            for (int i = 0; i < mi.Length; i++)
            {
                //由于AddValue不能添加重名值，为了避免子类变量名与基类变量名相同，将基类序列化的变量名加上基类类名
                FieldInfo fi = (FieldInfo)mi[0];
                object objValue = info.GetValue(basetype.FullName + "+" + fi.Name, fi.FieldType);
                fi.SetValue(this, objValue);
            }

#endregion

            a = info.GetInt32("a");
            strName = info.GetString("strName");
            c = (Color)info.GetValue("c", typeof(Color));
            _dtColors = (DataTable)info.GetValue("_dtColors", typeof(DataTable));
            list = (ArrayList)info.GetValue("list", typeof(ArrayList));
            list1 = (List<int>)info.GetValue("list1", typeof(List<int>));
            dic = (Dictionary<int, string>)info.GetValue("dic", typeof(Dictionary<int, string>));
        }

        public TestObject()
        {
            a = 100;
            strName = "daps";

InitColorTable();

list1.Add(10);
list1.Add(20);

}

#region ISerializable 成员

        [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter =true)]
        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("a", a);
            info.AddValue("strName", strName);
            info.AddValue("c", c);
            info.AddValue("_dtColors", _dtColors);
            info.AddValue("list", list);
            info.AddValue("list1", list1);
            info.AddValue("dic", dic);

Type basetype = this.GetType().BaseType;
MemberInfo[] mi = FormatterServices.GetSerializableMembers(basetype, context);

            for (int i = 0; i < mi.Length; i++)
            {
                //由于AddValue不能添加重名值，为了避免子类变量名与基类变量名相同，将基类序列化的变量名加上基类类名
                info.AddValue(basetype.FullName + "+" + mi[i].Name, ((FieldInfo)mi[i]).GetValue(this));
            }
        }

#endregion
}