jason和对象之间的转换

//Donet3.5自带了DLL处理json串
//注意引用：System.Runtime.Serialization，System.ServiceModel.Web

  namespace ConsoleApplication7
{
public class Test
{
    public string aaa="aa";
    public string ccc= "ccc";
    public List<Item> items = new List<Item>();

    public Test()
    {
        this.items.Add(new Item());
        this.items.Add(new Item());
        this.items.Add(new Item());
    }
}

public class Item
{
    public string item="aa";
}
class Program
{
    static void Main(string[] args)
    {
        string aaa = JsonTools.ObjectToJson(new Test());
        Console.WriteLine(aaa);

        Test aa = (Test)JsonTools.JsonToObject(aaa, new Test());
        Console.ReadKey();
    }
}

public class JsonTools
{
    // 从一个对象信息生成Json串
    public static string ObjectToJson(object obj)
    {
        DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
        MemoryStream stream = new MemoryStream();
        serializer.WriteObject(stream, obj);
        byte[] dataBytes = new byte[stream.Length];
        stream.Position = 0;
        stream.Read(dataBytes, 0, (int)stream.Length);
        return Encoding.UTF8.GetString(dataBytes);
    }
    // 从一个Json串生成对象信息
    public static object JsonToObject(string jsonString, object obj)
    {
        DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
        MemoryStream mStream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
        return serializer.ReadObject(mStream);
    }
}
}

对比的一个程序：
namespace ConsoleApplication9
{
public class Test
{
public string aaa = "aa";
public string ccc = "ccc";
public List<Item> items = new List<Item>();

    public Test()
    {
        this.items.Add(new Item());
        this.items.Add(new Item());
        this.items.Add(new Item());
    }
}

public class Item
{
    public string item = "aa";
    public string item2 = "bb";
}
class Program
{
    static void Main(string[] args)
    {
        List<Item> items = new List<Item>();
        items.Add(new Item());
        items.Add(new Item());
        items.Add(new Item());

        string aaa = JsonTools.ObjectToJson(new Test());
        Console.WriteLine(aaa);

        string ccc = JsonTools.ObjectToJson(items);
        Console.WriteLine(ccc);

        Test aa = (Test)JsonTools.JsonToObject(aaa, new Test());
        Console.ReadKey();

        List<Item> bb = (List<Item>)JsonTools.JsonToObject(ccc, items);
        Console.ReadKey();
    }
}

public class JsonTools
{
    // 从一个对象信息生成Json串
    public static string ObjectToJson(object obj)
    {
        DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
        MemoryStream stream = new MemoryStream();
        serializer.WriteObject(stream, obj);
        byte[] dataBytes = new byte[stream.Length];
        stream.Position = 0;
        stream.Read(dataBytes, 0, (int)stream.Length);
        return Encoding.UTF8.GetString(dataBytes);
    }
    // 从一个Json串生成对象信息
    public static object JsonToObject(string jsonString, object obj)
    {
        DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
        MemoryStream mStream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
        return serializer.ReadObject(mStream);
    }
}

}