.net序列化补充

 

一.可将多个对象序列化到一个流中

List<int> intList = new List<int>();
List<string> strList = new List<string>();
MemoryStream ms = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(ms, intList);
formatter.Serialize(ms, strList);
ms.Position = 0;
var list1 = (List<int>)formatter.Deserialize(ms);
var list2 = (List<string>)formatter.Deserialize(ms);

注意点:Formatter类型必须相同,序列化和反序列化顺序要相同

这样就不用把多个对象序列化到多个流当中了.

二.控制序列化和反序列化

[Serializable]
public class Person
{
    public string FirstName { get; set; }

    public string LastName { get; set; }

    //FirstName+LastName
    [NonSerialized]
    private string _name;

Name不需要序列化,因为是两个属性的组合,但Name需要一个初始化的入口点,如下

使用OnDeserialized标记

[Serializable]
public class Person
{
    public string FirstName { get; set; }

    public string LastName { get; set; }

    //FirstName+LastName
    [NonSerialized]
    private string _name;

    [OnDeserialized]
    private void OnDeserialized(StreamingContext context)
    {
        this._name = FirstName + LastName;
    }
}

全部的标记,ing在前,ed在后

[OnDeserialized]
private void OnDeserialized(StreamingContext context)
{
   
}

[OnDeserializing]
private void OnDeserializing(StreamingContext context)
{
 
}

[OnSerialized]
private void OnSerialized(StreamingContext context)
{
    
}

[OnSerializing]
private void OnSerializing(StreamingContext context)
{

}

三.序列化辅助类

来自MSDN的例子

[Serializable]
class Book
{
    public string Title;
    public string Author;

    // Constructor for setting new values.
    public Book(string newTitle, string newAuthor)
    {
        Title = newTitle;
        Author = newAuthor;
    }
}

1.GetSerializableMembers获取可序列化成员

2.GetObjectData以数组形式返回对象数据

3.GetSafeUninitializedObject创建对象新实例(注意:不会执行构造函数)

4.PopulateObjectMembers给对象填充数据

static void Run()
{
    // Create an instance of a Book class 
    // with a title and author.
    Book Book1 = new Book("Book Title 1",
        "Masato Kawai");

    // Store data about the serializable members in a 
    // MemberInfo array. The MemberInfo type holds 
    // only type data, not instance data.
    MemberInfo[] members =
       FormatterServices.GetSerializableMembers
       (typeof(Book));

    // Copy the data from the first book into an 
    // array of objects.
    object[] data =
        FormatterServices.GetObjectData(Book1, members);

    // Create an uninitialized instance of the Book class.
    Book Book1Copy =
        (Book)FormatterServices.GetSafeUninitializedObject
        (typeof(Book));

    // Call the PopuluateObjectMembers to copy the
    // data into the new Book instance.
    FormatterServices.PopulateObjectMembers
        (Book1Copy, members, data);

    // Print the data from the copy.
    Console.WriteLine("Title: {0}", Book1Copy.Title);
    Console.WriteLine("Author: {0}", Book1Copy.Author);
}

四.自定义序列化行为

如果第二点讲到的控制还不能让你满意的话,可以实现一个ISerializable接口.需要做两件事情.

1.实现GetObjectData方法,添加序列化数据

2.一个反序列化时的构造函数,初始化数据

[Serializable]
public class Insect : ISerializable
{
    private string name;
    private int id;
    public Insect(string name, int id)
    {
        this.name = name;
        this.id = id;
    }
    public override string ToString()
    {
        return String.Format("{0}:{1}", name, id);
    }
    public Insect() { }

    public virtual void GetObjectData(SerializationInfo s, StreamingContext c)
    {
        s.AddValue("CommonName", name);
        s.AddValue("ID#", id);
    }
    private Insect(SerializationInfo s, StreamingContext c)
    {
        name = s.GetString("CommonName");
        id = s.GetInt32("ID#")+1;
    }
}

例子转自http://www.cnblogs.com/wdxinren/archive/2004/10/23/55826.html

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