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","ticket":{"params":{"elvira":"http://elvira.mav-start.hu/elvira.dll","via":"http://imenetrend.com","k":"","alany":"27","ref":"O334EE0BAA525B811E200111210000005A0111010053E00007EU00770300053E04992425002FFC00050B00000053E04E9E90002383002FFC000A0B0000104A304E96D00025B8003118000000000000000049969000","Lang":"HU"},"url":"https://jegyvasarlas.mav-start.hu/eTicketV2/Jegykivalasztas","full_url":"https://jegyvasarlas.mav-start.hu/eTicketV2/Jegykivalasztas?k=&ref=O334EE0BAA525B811E200111210000005A0111010053E00007EU00770300053E04992425002FFC00050B00000053E04E9E90002383002FFC000A0B0000104A304E96D00025B8003118000000000000000049969000&alany=27&elvira=http://elvira.mav-start.hu/elvira.dll&Lang=HU&via=http://imenetrend.com"},"start":""},{"class_name":" 1.2. ","cost1st":"3.020 Ft ","destinationtime":"00:21","reservation":"-","distance":"126 km","change":"1","destination":"Miskolc-Tiszai","details":[{"starttime_real":"","starttime":"22:37","platform":"","traininfo":"5741 személy (Szolnok - Hatvan)","start":"Jászfényszaru"},{"starttime_real":"","starttime":"22:47","platform":"","traininfo":"","start":"Hatvan"},{"starttime_real":"","starttime":"22:56","platform":"4","traininfo":"5108 gyors (Budapest-Keleti - Miskolc-Tiszai)","start":"Hatvan"},{"starttime_real":"","starttime":"00:21","platform":"6","traininfo":"","start":"Miskolc-Tiszai"}],"totaltime":"1:44","starttime":"22:37","cost2nd":"2.480 Ft","class":" 1.2. 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这是常规列车服务JSON代码。我想在对象中插入数据。现在我将上述格式的数据从Web服务获取到Win phone 7。但在尝试解析时，我遇到了一个错误：

using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(_dataString)))
            {
                //parse into jsonser
                var ser = new DataContractJsonSerializer(typeof(MyPersonClass[]));
                MyPersonClass[] obj = (MyPersonClass[])ser.ReadObject(ms);
            }

这是MyPersonClass：

[DataContract]
public class MyPersonClass
{
    private string _Date;
    private string _Route;
    private string _Name;
    private string _Change;
    private string _Class;
    private string _Class_name;
    private string _Cost1st;
    private string _Cost2nd;
    private string _Destenation;
    private string _Destenationtime;
    private string _Platform;
    private string _Start;
    private string _Starttime;
    private string _Starttime_real;
    private string _Traininfo;
    private string _Distance;
    private string _Reservation;
    private string _Ticket;
    private string _Full_url;
    private string _Params;
    private string _lang;
    private string _Alany;
    private string _Elvira;
    private string _K;
    private string _Ref;
    private string _Via;
    private string _Url;
    private string _Totaltime;

    [DataMember(Name = "date")]
    public string _date 
    {
        get { return _Date; }
        set { _Date = value; }
    }
    [DataMember(Name = "route")]
    public string _route
    {
        get { return _Route; }
        set { _Date = value; }
    }
    [DataMember(Name = "change")]
    public string _change
    {
        get { return _Date; }
        set { _Date = value; }
    }
    [DataMember(Name = "class")]
    public string _class
    {
        get { return _Name; }
        set { _Name = value; }
    }
    [DataMember(Name = "class_name")]
    public string _class_name
    {
        get { return _Class_name; }
        set { _Class_name = value; }
    }
                 .......

    [DataMember(Name = "k")]
    public string _k
    {
        get { return _K; }
        set { _K = value; }
    }
    [DataMember(Name = "ref")]
    public string _ref
    {
        get { return _Ref; }
        set { _Ref = value; }
    }
    [DataMember(Name = "via")]
    public string _via
    {
        get { return _Via; }
        set { _Via = value; }
    }
    [DataMember(Name = "url")]
    public string _url
    {
        get { return _Url; }
        set { _Url = value; }
    }
    [DataMember(Name = "totaltime")]
    public string _totaltime
    {
        get { return _Totaltime; }
        set { _Totaltime = value; }
    }
}

有什么想法吗？

Answer 1

我相信你在这里遇到了一些问题。首先，您的MyPersonClass类型与您给出的json示例的结构不完全匹配。如果你把那个json字符串插入this site，它通常会（如果你给它的json字符串包含空值或空数组，它将无法为这些条目提供准确的类型）为您提供解析该字符串所需的类，然后它将为您提供的RootObject类MyPersonClass。

第二个问题是，虽然您给出的json字符串只是一个对象，但您告诉DataContractJsonSerializer您希望它反序列化一个对象数组。你可能想要的是：

var ser = new DataContractJsonSerializer(typeof(MyPersonClass)); 
MyPersonClass obj = (MyPersonClass)ser.ReadObject(ms);

Windows Phone 7 JSON InvalidCastException

1 个答案: