将值转换为我的json中的类型'System.Collections.Generic.List`时出错 [英] Error converting value to type 'System.Collections.Generic.List` in my json

问题描述

在将JSON转换为C#中的对象时遇到问题.我想知道json或对象结构出了什么问题?为什么会失败?

I am having problem in converting JSON to object in C#. I want to know that what's wrong with my json or object structure? Why its failing?

我的JSON是:

[ { "added_on" : "10-03-2014",
    "country" : "INDIA",
    "crew" : "{\"Actor1\": \"Kangana\", \"Actor2\":\"Lisa Haydon\"}\r\n",
    "fb_link" : "https://www.facebook.com/Queenthefilm",
    "genre" : "DRAMA",
    "id" : 1,
    "image_first_url" : "",
    "image_main_url" : "133avk38CcBfNHsqwr0nzqOa8Db.jpg",
    "image_second_url" : "",
    "name" : "Queen",
    "ratings" : "[{\"type\": \"IMDB\", \"value\": \"9.3\"}, {\"type\": \"TOI\", \"value\": \"4\"}, {\"type\": \"NDTV\", \"value\": \"3\"}]",
    "release_date" : "07-03-2014",
    "release_year" : 2014,
    "storyline" : "A Delhi girl from a traditional family sets out on a solo honeymoon after her marriage gets canceled.",
    "twitter_link" : "https://twitter.com/Queenthefilm",
    "youtube_link" : "http://www.youtube.com/watch?v=KGC6vl3lzf0"
  } ]

我的对象结构:

public class Movie
{
    public string id { get; set; }
    public string name { get; set; }
    public string storyline { get; set; }
    public string crew { get; set; }
    public string genre { get; set; }
    public string release_year { get; set; }
    public string release_date { get; set; }
    public string country { get; set; }
    public string youtube_link { get; set; }
    public string fb_link { get; set; }
    public string twitter_link { get; set; }
    public string image_main_url { get; set; }
    public string image_first_url { get; set; }
    public string image_second_url { get; set; }
    public string added_on { get; set; }
    public List<Rating> ratings { get; set; }
}

public class Rating
{
    public string type { get; set; }
    public string value { get; set; }
}

错误:

Error converting value "[{"type": "IMDB", "value": "9.3"}, {"type": "TOI", "value": "4"}, {"type": "NDTV", "value": "3"}]" to type 'System.Collections.Generic.List`1[mq.channel.Rating]'. Path '[0].ratings', line 1, position 731.

推荐答案

您的JSON不包含ratings属性的数组，而是一个字符串. 它应该看起来像

Your JSON doesn't contain an array for the ratings property but a string. It should rather look like

[ { "added_on" : "10-03-2014",
    "country" : "INDIA",
    "crew" : "{\"Actor1\": \"Kangana\", \"Actor2\":\"Lisa Haydon\"}\r\n",
    "fb_link" : "https://www.facebook.com/Queenthefilm",
    "genre" : "DRAMA",
    "id" : 1,
    "image_first_url" : "",
    "image_main_url" : "133avk38CcBfNHsqwr0nzqOa8Db.jpg",
    "image_second_url" : "",
    "name" : "Queen",
    "ratings" : [{"type": "IMDB", "value": "9.3"}, {"type": "TOI", "value": "4"}, {"type": "NDTV", "value": "3"}],
    "release_date" : "07-03-2014",
    "release_year" : 2014,
    "storyline" : "A Delhi girl from a traditional family sets out on a solo honeymoon after her marriage gets canceled.",
    "twitter_link" : "https://twitter.com/Queenthefilm",
    "youtube_link" : "http://www.youtube.com/watch?v=KGC6vl3lzf0"
  } ]

为了将ratings属性分析为数组(请注意，引号和转义反斜杠已删除)

in order for the ratings property to be analyzed as an array (note that the quotes and escape backslashes are removed)

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