Deserialize JSon result with array - json

Question

I have some problem to read from a json. Here is the json what I get:
{
"LoginName": null,
"EmailAddress": null,
"FirstName": null,
"LastName": null,
"ErrorList": [
{
"ErrorNumber": 5001,
"ErrorMessage": "Validation Error: The UserName field is required.",
"Details": null
},
{
"ErrorNumber": 5001,
"ErrorMessage": "Validation Error: The Password field is required.",
"Details": null
},
{
"ErrorNumber": 1,
"ErrorMessage": "The username or password is not correct!",
"Details": null
}
]
}
Here are my classes:
[DataContract]
public class User
{
[DataMember(Name = "LoginName")]
public string loginName { get; set; }
[DataMember(Name = "EmailAddress")]
public string emailAddress { get; set; }
[DataMember(Name = "LastName")]
public string lastName { get; set; }
[DataMember(Name = "FirstName")]
public string firstName { get; set; }
[DataMember(Name = "ErrorList")]
public ErrorList[] errorList { get; set; }
}
[DataContract]
public class ErrorList
{
[DataMember(Name = "ErrorNumber")]
public int errorNumber { get; set; }
[DataMember(Name = "ErrorMessage")]
public string errorMessage { get; set; }
}
I can get for example the LoginName and EmailAddress, but I can't get the element of ErrorList.
Here is the code for deserialize the json result:
var res = await result.Content.ReadAsStringAsync();
var answer = JsonConvert.DeserializeObject<User>(res);
Email.Text = answer.emailAddress;
It works, but I don't reach the array.
Anyone has any idea to solve this problem?

Answer 1

As #Abdurrahman Köken stated, maybe you should use JSON.NET attributes instead of System.Runtime.Serialization.
Still, this code has nothing wrong with it. Error is somewhere else. Using your User class as-is, with provided JSON, and deserializing it as var answer = JsonConvert.DeserializeObject<User>(yourJsonHere); gives the following:
So, after deserialization
answer.errorList.ToList().ForEach(error =>
Console.WriteLine(#"{0}={1}", error.errorNumber, error.errorMessage));
Outputs
5001=Validation Error: The UserName field is required.
5001=Validation Error: The Password field is required.
1=The username or password is not correct!

Answer 2

You should change DataMember attributes with JsonProperty. This should work:
public class User
{
[JsonProperty("LoginName")]
public string loginName { get; set; }
[JsonProperty("EmailAddress")]
public string emailAddress { get; set; }
[JsonProperty("LastName")]
public string lastName { get; set; }
[JsonProperty("FirstName")]
public string firstName { get; set; }
[JsonProperty("ErrorList")]
public ErrorList[] errorList { get; set; }
}
public class ErrorList
{
[JsonProperty("ErrorNumber")]
public int errorNumber { get; set; }
[JsonProperty("ErrorMessage")]
public string errorMessage { get; set; }
}