【WP7】对象序列化

  在WP7中,经常需要使用到保存数据,对对象的保存可以通过序列化到流,然后保存到文件中

常用的有三种序列化方式:xml,Json,DataContract

下面介绍着三种序列化的使用

  首先,定义一个序列化类Person

        public class Person
        {
            public string Name { get; set; }
            public int Age { get; set; }
        }

1、使用XmlSerializer序列化

  需要引用 System.Xml.Serialization 库

        Person person = new Person() { Name = "Bomo", Age = 20 };
        //xml序列化开始
        MemoryStream ms = new MemoryStream();
        XmlSerializer xml = new XmlSerializer(typeof(Person));
        xml.Serialize(ms, person);//xml序列化的关键代码     
        byte[] arr = ms.ToArray();
        ms.Close();
        string xmlString = Encoding.UTF8.GetString(arr,0,arr.Length);

        MessageBox.Show(xmlString.Length.ToString());

        //xml反序列化                     
        MemoryStream ms2 = new MemoryStream(Encoding.UTF8.GetBytes(xmlString));
        XmlSerializer xml2 = new XmlSerializer(typeof(Person));            
        Person pTest = xml.Deserialize(ms2) as Person;//xml反序列化的关键代码
        ms2.Close();

 

2、使用Json

  需要引用 System.ServiceModel.Web 库

    把对象序列化到流中,然后转换为json字符串

    反序列化时,先把字符串读取到流中,然后进行反序列化

        Person person = new Person() { Name = "Bomo", Age = 20 };

        // 序列化 
        string jsonString;
        using (var ms = new MemoryStream())
        {
            new DataContractJsonSerializer(p1.GetType()).WriteObject(ms, p1);
            jsonString = Encoding.UTF8.GetString(ms.ToArray(), 0, (int)ms.Length);
            MessageBox.Show(jsonString.Length.ToString());
        }
        // 反序列化
        using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))
        {
            Person desp = (Person)new DataContractJsonSerializer(typeof(Person)).ReadObject(ms);
        }

 

3、使用DataContract序列化

  需要引用 System.Runtime.Serialization 库,步骤与Json类似  

        Person p1 = new Person() { Name = "Bomo", Age = 28 };
        //DataContract序列化
        MemoryStream ms = new MemoryStream();            
        DataContractSerializer ser = new DataContractSerializer(typeof(Person));
        ser.WriteObject(ms, p1);

        byte[] array = ms.ToArray();
        ms.Close();

        string _serializeString = Encoding.UTF8.GetString(array, 0, array.Length);
        MessageBox.Show(_serializeString.Length.ToString());

        //反序列化
        DataContractSerializer ser2 = new DataContractSerializer(typeof(Person));
        MemoryStream ms2 = new MemoryStream(Encoding.UTF8.GetBytes(_serializeString));
        Person p2 = ser2.ReadObject(ms2) as Person;

 

以上三种方法,Xml序列化的字符串最大,速度最慢,Json最快,体积最小

推荐使用Json来序列化对象

posted @ 2013-01-05 09:44  bomo  阅读(780)  评论(0编辑  收藏  举报