[英]JSON Deserialization Error in C#
I want to Deserialize a JSON object to C# but I'm getting this exception: 我想将一个JSON对象反序列化为C#,但我得到了这个异常:
Cannot deserialize the current JSON array (eg [1,2,3]) into type 'FYP___Task_1.RootObject' because the type requires a JSON object (eg {"name":"value"}) to deserialize correctly. 无法将当前JSON数组(例如[1,2,3])反序列化为类型'FYP ___ Task_1.RootObject',因为该类型需要JSON对象(例如{“name”:“value”})才能正确反序列化。
To fix this error either change the JSON to a JSON object (eg {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (eg ICollection, IList) like List that can be deserialized from a JSON array. 要修复此错误,请将JSON更改为JSON对象(例如{“name”:“value”})或将反序列化类型更改为数组或实现集合接口的类型(例如ICollection,IList),例如List从JSON数组反序列化。 JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. JsonArrayAttribute也可以添加到类型中以强制它从JSON数组反序列化。
Path '', line 1, position 1. 路径'',第1行,第1位。
I've tried to get this error solved by different solutions I found on StackOverflow but no one worked. 我试图通过我在StackOverflow上找到的不同解决方案来解决此错误,但没有人工作。
The JSON I'm using is as follows: 我正在使用的JSON如下:
[
{
"rating_count": 158271,
"genres": [
"Action",
"Crime",
"Thriller"
],
"rated": "PG-13",
"language": [
"English",
"French",
"Mandarin"
],
"rating": 6.7,
"country": [
"France",
"USA"
],
"release_date": 20021011,
"title": "Transporter\n \"The Transporter\"",
"year": 2002,
"filming_locations": "Avenue de Saissy, Cannes, Alpes-Maritimes, France",
"imdb_id": "tt0293662",
"directors": [
"Corey Yuen"
],
"writers": [
"Luc Besson",
"Robert Mark Kamen"
],
"actors": [
"Jason Statham",
"Qi Shu",
"Matt Schulze",
"François Berléand",
"Ric Young",
"Doug Rand",
"Didier Saint Melin",
"Tonio Descanvelle",
"Laurent Desponds",
"Matthieu Albertini",
"Vincent Nemeth",
"Jean-Yves Bilien",
"Jean-Marie Paris",
"Adrian Dearnell",
"Alfred Lot"
],
"also_known_as": [
"Transporter"
],
"poster": {
"imdb": "http://ia.media-imdb.com/images/M/MV5BMTk2NDc2MDAxN15BMl5BanBnXkFtZTYwNDc1NDY2._V1_SY317_CR3,0,214,317_.jpg",
"cover": "http://imdb-poster.b0.upaiyun.com/000/293/662.jpg!cover?_upt=cd37cf0e1385015165"
},
"runtime": [
"92 min"
],
"type": "M",
"imdb_url": "http://www.imdb.com/title/tt0293662/"
}
]
The classes I'm using: 我正在使用的课程:
public class Poster
{
public string imdb { get; set; }
public string cover { get; set; }
}
public class RootObject
{
public int rating_count { get; set; }
public List<string> genres { get; set; }
public string rated { get; set; }
public List<string> language { get; set; }
public double rating { get; set; }
public List<string> country { get; set; }
public int release_date { get; set; }
public string title { get; set; }
public int year { get; set; }
public string filming_locations { get; set; }
public string imdb_id { get; set; }
public List<string> directors { get; set; }
public List<string> writers { get; set; }
public List<string> actors { get; set; }
public List<string> also_known_as { get; set; }
public Poster poster { get; set; }
public List<string> runtime { get; set; }
public string type { get; set; }
public string imdb_url { get; set; }
}
Your JSON object has the structure [ {..} ]
which means it is a list of objects. 您的JSON对象具有结构[ {..} ]
,这意味着它是一个对象列表。 In your case, your list has only one object, but it is still a list. 在您的情况下,您的列表只有一个对象,但它仍然是一个列表。 What you are trying to do is turn the list into an object, so you get an exception. 你要做的是将列表变成一个对象,所以你得到一个例外。
The solution is either to change your JSON to {..}
(ie remove the square brackets) OR deserialize the JSON into an array of RootObject
and then just read the first one, for example: 解决方案是将您的JSON更改为{..}
(即删除方括号)或将JSON反序列化为RootObject
数组,然后只读取第一个,例如:
RootObject[] myArray = json.Deserialize<RootObject[]>("json goes here");
RootObject firstObject = myArray[0];
We can try the below option also. 我们也可以尝试以下选项。
var root = response1.Content.ReadAsAsync<RootObject>().Result;
GridView1.DataSource = root.items;
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