100分询问使用DataContractJsonSerializer 反序列化复杂JSON时的问题

Question

现在JSON如下：{"id":"222332","moreinfo":"{"info1":"haha","info2":"heihei"}"}那么我定义如下类
<DataContract()> _
Public Class MainClass    Private _ID As String    Private _MoreInfo As MoreInfoClass    <DataMember(Name:="id")> _
    Property ID() As Integer
        Get
            Return _ID
        End Get
        Set(ByVal value As Integer)
            _ID = value
        End Set
    End Property    <DataMember(Name:="moreinfo")> _
    Property MoreInfo() As MoreInfoClass
        Get
            Return _MoreInfo
        End Get
        Set(ByVal value As MoreInfoClass)
            _MoreInfo = value
        End Set
    End Property    Public Sub New()
        _ID = ""
        _MoreInfo = New MoreInfoClass
    End SubEnd Class<DataContract()> _
Public Class MoreInfoClass    Private _Info1 As String    Private _Info2 As String    <DataMember(Name:="info1")> _
    Property Info1() As String
        Get
            Return _Info1
        End Get
        Set(ByVal value As String)
            _Info1 = value
        End Set
    End Property    <DataMember(Name:="info2")> _
    Property Info2() As String
        Get
            Return _Info2
        End Get
        Set(ByVal value As String)
            _Info2 = value
        End Set
    End Property    Public Sub New()
        _Info1 = ""
        _Info2 = ""
    End Sub
End Class
两个类反序列化代码如下
Dim JsonString as String="最上面的JSON"
Dim JsonSerializer As New DataContractJsonSerializer(GetType(MainClass))
Dim Stream As New MemoryStream(Encoding.UTF8.GetBytes(JsonString))
Dim TempReturn As MainClass = JsonSerializer.ReadObject(Stream)为什么总是出现应为状态“Element”。。遇到名称为“”、命名空间为“”的“Text”。 这样的错误是不是里面嵌套一个类后，定义方法不一样还是怎么的，谁知道呢？？？？？

Answer 1

我还以为是C#的……看不懂VB……请转为C#再贴上来……

Answer 2

这几句代码很简单的啊，就是2个类
还有一段反序列化代码就是想寻求复杂JSON使用DataContractJsonSerializer反序列化的已有解决方案，这个是我自己写的

Answer 3

不是，因为VB语言有其自己的特色……所以有些问题是VB独有的，虽然都是net平台下的语言……你贴出来的是简单，没看出有什么不妥的……能力有限……能力有限……

Answer 4

DataContractJsonSerializer不能实现复杂类型的反序列化。有两种替代方案。
1）拼接法，这个比较麻烦。
2）第三方库
Newtonsoft.Json.JavaScriptConvert.DeserializeObject
可用来把JSON字符串转成实体,而且非常简单。

Answer 5

下午花了点时间研究了一下,发现上面回答错了.
其实DataContractJsonSerializer的方案是最佳的.
试着反序列化了一下开心网的数据,效果不错.
连字符转义和UNICODE都自动解决了,这个要好于Newtonsoft库.            //--------json/test/userdata-------
            string strUserData = ContentHelper.GetMidString(HTML, "v_userdata = ", ";");
            jsr = new DataContractJsonSerializer(typeof(UserData));
            ms = new MemoryStream(Encoding.UTF8.GetBytes(strUserData));
            UserData userData = (UserData)jsr.ReadObject(ms);            Console.WriteLine("ERROR:{0}", userData.Error);
            Console.WriteLine();            Console.WriteLine("CONFIG MIN:{0}", userData.Config.money_minute);
            Console.WriteLine("CONFIG MAX:{0}", userData.Config.money_max);
            Console.WriteLine();            Console.WriteLine("ParKing ID [0]:{0}", userData.Parking[0].parkid);
            Console.WriteLine("ParKing ID [1]:{0}", userData.Parking[1].parkid);
            Console.WriteLine();            Console.WriteLine("VUID:{0}", userData.User.vuid);
            Console.WriteLine("UID:{0}", userData.User.uid);
            Console.WriteLine("Neighbor:{0}", userData.User.neighbor);
            Console.WriteLine("IsFriend:{0}", userData.User.isfriend);
            Console.WriteLine("FirstFeeParking:{0}", userData.User.first_fee_parking);
            Console.WriteLine("FirstFreeParking:{0}", userData.User.first_free_parking);
            Console.WriteLine("RealName:{0}", userData.User.real_name);
            Console.WriteLine("Ta:{0}", userData.User.ta);
            Console.WriteLine("Logo50:{0}", userData.User.logo50);
            Console.WriteLine("Logo20:{0}", userData.User.logo20);
            Console.WriteLine("Avenue:{0}", userData.User.avenue);
            Console.WriteLine("Cash:{0}", userData.User.cash);
            Console.WriteLine("Scene:{0}", userData.User.scene);
            Console.WriteLine("Sceneid:{0}", userData.User.sceneid);
            Console.WriteLine("Showmoneyminute:{0}", userData.User.showmoneyminute);
            Console.WriteLine("Online2:{0}", userData.User.online2);
            Console.WriteLine();            string strFriendData = ContentHelper.GetMidString(HTML, "v_frienddata = ", ";");
            //strFriendData = "{\"friend\":" + strFriendData + "}";
            jsr = new DataContractJsonSerializer(typeof(Friend[]));
            ms = new MemoryStream(Encoding.UTF8.GetBytes(strFriendData));
            Friend[] friendData = (Friend[])jsr.ReadObject(ms);            Console.WriteLine("uid:{0}", friendData[0].uid);
            Console.WriteLine("uid:{0}", friendData[0].real_name);
            Console.WriteLine("uid:{0}", friendData[0].ta);
            Console.WriteLine("uid:{0}", friendData[0].full);
            Console.WriteLine("uid:{0}", friendData[0].scenemoney);
            Console.WriteLine("uid:{0}", friendData[0].scenename);
            Console.WriteLine("uid:{0}", friendData[0].neighbor);
            Console.WriteLine("uid:{0}", friendData[0].online);            jsr = null;
            ms = null;

Answer 6

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization;namespace pcTest.Kaixin001.Entity
{
    //money_minute
    //money_max
    [DataContract]
    class Config
    {
        [DataMember(Name = "money_minute")]
        public string money_minute { get; set; }        [DataMember(Name = "money_max")]
        public string money_max { get; set; }    }
    
    //vuid
    //uid
    //neighbor
    //isfriend
    //first_fee_parking
    //first_free_parking
    //real_name
    //ta
    //logo50
    //logo20
    //avenue
    //cash
    //scene
    //sceneid
    //showmoneyminute
    //online2
    [DataContract]
    class User
    {
        [DataMember(Name = "vuid")]
        public string vuid { get; set; }        [DataMember(Name = "uid")]
        public string uid { get; set; }        [DataMember(Name = "neighbor")]
        public string neighbor { get; set; }        [DataMember(Name = "isfriend")]
        public string isfriend { get; set; }        [DataMember(Name = "first_fee_parking")]
        public string first_fee_parking { get; set; }        [DataMember(Name = "first_free_parking")]
        public string first_free_parking { get; set; }        [DataMember(Name = "real_name")]
        public string real_name { get; set; }        [DataMember(Name = "ta")]
        public string ta { get; set; }        [DataMember(Name = "logo50")]
        public string logo50 { get; set; }        [DataMember(Name = "logo20")]
        public string logo20 { get; set; }        [DataMember(Name = "avenue")]
        public string avenue { get; set; }        [DataMember(Name = "cash")]
        public string cash { get; set; }        [DataMember(Name = "scene")]
        public string scene { get; set; }        [DataMember(Name = "sceneid")]
        public string sceneid { get; set; }        [DataMember(Name = "showmoneyminute")]
        public string showmoneyminute { get; set; }        [DataMember(Name = "online2")]
        public string online2 { get; set; }    }    //parkid
    //car_uid
    //carid
    //ctime
    //car_real_name
    //car_logo20
    //car_isfriend
    //car_logo_big
    //car_logo_small
    //car_logo_flash
    //car_police
    //car_profit
    //car_trade
    //car_tradename
    //car_price
    //car_name
    [DataContract]
    class Parking
    {
        [DataMember(Name = "parkid")]
        public string parkid { get; set; }        [DataMember(Name = "car_uid")]
        public string car_uid { get; set; }        [DataMember(Name = "carid")]
        public string carid { get; set; }        [DataMember(Name = "ctime")]
        public string ctime { get; set; }        [DataMember(Name = "car_real_name")]
        public string car_real_name { get; set; }        [DataMember(Name = "car_logo20")]
        public string car_logo20 { get; set; }        [DataMember(Name = "car_isfriend")]
        public string car_isfriend { get; set; }        [DataMember(Name = "car_logo_big")]
        public string car_logo_big { get; set; }        [DataMember(Name = "car_logo_small")]
        public string car_logo_small { get; set; }        [DataMember(Name = "car_logo_flash")]
        public string car_logo_flash { get; set; }        [DataMember(Name = "car_police")]
        public string car_police { get; set; }        [DataMember(Name = "car_profit")]
        public string car_profit { get; set; }        [DataMember(Name = "car_trade")]
        public string car_trade { get; set; }        [DataMember(Name = "car_tradename")]
        public string car_tradename { get; set; }        [DataMember(Name = "car_price")]
        public string car_price { get; set; }        [DataMember(Name = "car_name")]
        public string car_name { get; set; }    }    //carid
    //price
    //neighbor
    //park_uid
    //parkid
    //ctime
    //car_name
    //car_logo_big
    //car_logo_small
    //car_logo_flash
    //car_trade
    //car_tradename
    //car_police
    //park_real_name
    //park_logo20
    //park_profit
    //park_moneyminute
    [DataContract]
    class Car
    {
        [DataMember(Name = "carid")]
        public string carid { get; set; }        [DataMember(Name = "price")]
        public string price { get; set; }        [DataMember(Name = "neighbor")]
        public string neighbor { get; set; }        [DataMember(Name = "park_uid")]
        public string park_uid { get; set; }        [DataMember(Name = "parkid")]
        public string parkid { get; set; }        [DataMember(Name = "ctime")]
        public string ctime { get; set; }        [DataMember(Name = "car_name")]
        public string car_name { get; set; }        [DataMember(Name = "car_logo_big")]
        public string car_logo_big { get; set; }        [DataMember(Name = "car_logo_small")]
        public string car_logo_small { get; set; }        [DataMember(Name = "car_logo_flash")]
        public string car_logo_flash { get; set; }        [DataMember(Name = "car_trade")]
        public string car_trade { get; set; }        [DataMember(Name = "car_tradename")]
        public string car_tradename { get; set; }        [DataMember(Name = "car_police")]
        public string car_police { get; set; }        [DataMember(Name = "park_real_name")]
        public string park_real_name { get; set; }        [DataMember(Name = "park_logo20")]
        public string park_logo20 { get; set; }        [DataMember(Name = "park_profit")]
        public string park_profit { get; set; }        [DataMember(Name = "park_moneyminute")]
        public string park_moneyminute { get; set; }    }    //error
    //config
    //user[]
    //parking[]
    //car[]
    [DataContract]
    class UserData
    {
        [DataMember(Name = "error")]
        public string Error { get; set; }        [DataMember(Name = "config")]
        public Config Config { get; set; }        [DataMember(Name = "user")]
        public User User { get; set; }        [DataMember(Name = "parking")]
        public Parking[] Parking { get; set; }        [DataMember(Name = "car")]
        public Car[] Car { get; set; }    }
}using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization;namespace pcTest.Kaixin001.Entity
{
    //uid
    //real_name
    //ta
    //full
    //scenemoney
    //scenename
    //neighbor
    //online
    [DataContract]
    class Friend
    {
        [DataMember(Name = "uid")]
        public string uid { get; set; }        [DataMember(Name = "real_name")]
        public string real_name { get; set; }        [DataMember(Name = "ta")]
        public string ta { get; set; }        [DataMember(Name = "full")]
        public string full { get; set; }        [DataMember(Name = "scenemoney")]
        public string scenemoney { get; set; }        [DataMember(Name = "scenename")]
        public string scenename { get; set; }        [DataMember(Name = "neighbor")]
        public string neighbor { get; set; }        [DataMember(Name = "online")]
        public string online { get; set; }    }
}