C#使用DataContractJsonSerializer实现Json格式的序列化和反序列化

实体类Student：
程序代码
/// <summary>
/// 学生实体类
/// </summary>
[System.Runtime.Serialization.DataContract(Namespace="http://www.mzwu.com/")]
public class Student
{
    private string _Name;
    private int _Age;

    public Student(string name, int age)
    {
        _Name = name;
        _Age = age;
    }

    /// <summary>
    /// 姓名
    /// </summary>
    [System.Runtime.Serialization.DataMember]
    public string Name
    {
        set {_Name = value;}
        get { return _Name; }
    }

    /// <summary>
    /// 年龄
    /// </summary>
    [System.Runtime.Serialization.DataMember]
    public int Age
    {
        set { _Age = value; }
        get { return _Age; }
    }
}

注意：必须使用DataContractAttribute对类进行标记，使用DataMemberAttribute类成员进行标记，否则该类无法被序列化。

对象转为JSON字符串
程序代码
Student stu = new Student("小李", 30);

System.Runtime.Serialization.Json.DataContractJsonSerializer json = new System.Runtime.Serialization.Json.DataContractJsonSerializer(stu.GetType());
using (MemoryStream stream = new MemoryStream())
{
    json.WriteObject(stream, stu);
    Response.Write(System.Text.Encoding.UTF8.GetString(stream.ToArray()));
}

JSON字符串转为对象

程序代码
System.Runtime.Serialization.Json.DataContractJsonSerializer json = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(Student));
using (MemoryStream stream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes("{\"Age\":20,\"Name\":\"张三\"} ")))
{
    Student stu = (Student)json.ReadObject(stream);
    Response.Write(string.Format("name:{0},age:{1}", stu.Name, stu.Age));
}

注：.NET Framework 3.5下才可用DataContractJsonSerializer！