Json在C＃中反序列化

Question

How to use JsonConvert.DeserializeObject with below Json

[{
  "attributes" : {
    "type" : "User",
    "url" : "/xx/xx/xx"
  },
  "Id" : "1",
  "Name" : "abc"
},{
  "attributes" : {
    "type" : "User",
    "url" : "/xx/xx/xx"
  },
  "Id" : "2",
  "Name" : "abc"
},{
  "attributes" : {
    "type" : "User",
    "url" : "/xx/xx/xx"
  },
  "Id" : "3",
  "Name" : "abc"
}]

These are my class

public class Attributes
{
    public string type { get; set; }
    public string url { get; set; }
}

public class RootObject
{
    public Attributes attributes { get; set; }
    public string Id { get; set; }
    public string Name { get; set; }
}

I have tried with

var c = JsonConvert.DeserializeObject <RootObject>(jsonText);

Answer 1

Your Json actually represents an array of RootObject instances. Try this:

var c = JsonConvert.DeserializeObject<RootObject[]>(jsonText);

Or possibly

var c = JsonConvert.DeserializeObject<List<RootObject>>(jsonText);

Or even

var c = JsonConvert.DeserializeObject<IEnumerable<RootObject>>(jsonText);

Answer 2

您的JSON实际上是一个数组，因此请尝试将其反序列化为RootObject[] ：

var c = JsonConvert.DeserializeObject<RootObject[]>(jsonText);

Answer 3

You json is a array (or collection), try to deserialize it using the array type:

var c = JsonConvert.DeserializeObject<RootObject[]>(jsonText);

Or any other type of collection, for sample:

var c = JsonConvert.DeserializeObject<IEnumerable<RootObject>>(jsonText);
var c = JsonConvert.DeserializeObject<ICollection<RootObject>>(jsonText);

Answer 4

Try telling the deserializer what you're expecting to deserialize to, in this case RootObject. According to the documentation of the method you're currently calling JsonConvert.DeserializeObject Method (String) returns a .net object.

While this method JsonConvert.DeserializeObject<T> Method (String) returns the specified type. for example:

public class Attributes
{
    public string type { get; set; }
    public string url { get; set; }
}

public class RootObject
{
    public Attributes attributes { get; set; }
    public string Id { get; set; }
    public string Name { get; set; }
}

RootObject c = JsonConvert.DeserializeObject<RootObject>(jsonText);