读取JSON文件时出错

Question

我需要解析/读取这个json文件。

​

/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* [{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"interior","shotTypeAbbreviation":"I","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_i_oem_1_423.jpg"],"source":"OEM","vdpOrder":3},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"R","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_r_oem_1_300.jpg"],"source":"OEM","vdpOrder":6},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"RQ","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_1_196.jpg"],"source":"OEM","vdpOrder":2},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"FQ","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_1_396.jpg"],"source":"OEM","vdpOrder":1},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"RQ","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_rq_oem_2_400.jpg"],"source":"OEM","vdpOrder":7},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"FQ","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_98.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_fq_oem_2_175.jpg"],"source":"OEM","vdpOrder":5},{"children":[],"id":"dam/photo/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1","site":"dam","authorNames":["Volvo Cars of North America, Inc."],"captionTranscript":"2001 Volvo V70 XC AWD 4dr Wagon ","type":"PHOTOS","subType":"exterior","shotTypeAbbreviation":"S","photoSrcs":["/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_185.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_400.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_131.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_196.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_396.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_87.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_276.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_300.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_423.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_175.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_500.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_150.jpg","/volvo/v70/2001/oem/2001_volvo_v70_wagon_xc_s_oem_1_98.jpg"],"source":"OEM","vdpOrder":4}]
*/

​

下面是我使用JSON.net反序列化它的类代码

​

 public class Photo
    {

        public List<Children> children;

    }
    public class Children
    {
        public string id;
        public string site;
        public List<string> authorNames;
        public string captionTranscript;
        public string type;
        public string subType;
        public string shotTypeAbbreviation;
        public List<string> photoSrcs;
        public string source;
        public string vdpOrder;
    }

    StreamReader sr = new StreamReader(_filename);
    string str = sr.ReadToEnd();

    sr.Close();

    Photo p = JsonConvert.DeserializeObject<Photo>(str);// this line gives error

​

但我错了

无法将当前的JSON数组(例如，1,2,3)反序列化为类型'WindowsFormsApplication1.Photo‘，因为该类型需要一个JSON对象(例如，{"name":"value"})才能正确反序列化。要修复此错误，要么将JSON更改为JSON对象(例如，{"name":"value"})，要么将反序列化类型更改为数组，或者将实现集合接口(例如ICollection、IList)的类型改为可以从JSON数组反序列化的列表。还可以将JsonArrayAttribute添加到该类型中，以强制它从JSON数组中反序列化。路径''，第1行，位置1。

Answer 1

您的json是一个数组/列表。所以反序列化为一个列表。

var photos = JsonConvert.DeserializeObject<List<Photo>>(json);

public class Photo
{
    public List<object> children { get; set; }
    public string id { get; set; }
    public string site { get; set; }
    public List<string> authorNames { get; set; }
    public string captionTranscript { get; set; }
    public string type { get; set; }
    public string subType { get; set; }
    public string shotTypeAbbreviation { get; set; }
    public List<string> photoSrcs { get; set; }
    public string source { get; set; }
    public int vdpOrder { get; set; }
}