How to deserialize JSON to List?

Question

I have a serialized JSON string serializedClaims -

var claims = new List<Claim>();

claims.Add(new Claim("MakerId", "939393", ClaimValueTypes.String));
claims.Add(new Claim(ClaimTypes.DateOfBirth, "1956-03-08", ClaimValueTypes.Date));

var serializedClaims = JsonConvert.SerializeObject(claims);

Now I want to deserialize serializedClaims back to a List<Claim>.

How to do that?

Does JsonConvert.DeserializeObject<List<Claim>>(serializedClaims); not work? — Rollie
– Rollie, Commented Oct 19, 2016 at 4:58
No it does not , errors out "Unable to find a constructor for System.Security.Claims.Claim" — GilliVilla
– GilliVilla, Commented Oct 19, 2016 at 5:44
@GilliVilla You have to add Constructor to your Claim class. — Divyang Desai
– Divyang Desai, Commented Oct 19, 2016 at 6:54
Specifically, you have to add a default constructor, so public Claim() {...}. This is because under the covers, JsonConvert is iterating over the JSON objects in serializedClaims, and for each, creating a new Claim using the default constructor, and using reflection to populate properties of that object using similarly named entries in the JSON object. — Rollie
– Rollie, Commented Oct 21, 2016 at 4:27

Mostafiz · Accepted Answer · 2016-10-19 05:13:54Z

1

You can do by specified the List<Claim> type in conversion

var dserializedClaims = JsonConvert.DeserializeObject<List<Claim>>(serializedClaims);

edited Oct 19, 2016 at 5:13

answered Oct 19, 2016 at 4:59

Mostafiz

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2 Comments

Hamid Pourjam Over a year ago

It should be JsonConvert.DeserializeObject<List<Claim>>(....

Hamid Pourjam Over a year ago

Now it's just like Nihal Rp's answer.

Nihal Rp · Accepted Answer · 2016-10-19 05:00:31Z

0

You could do

List<Claim> deserializedClaims = JsonConvert.DeserializeObject<List<Claim>>(serializedClaims);

answered Oct 19, 2016 at 5:00

Nihal Rp

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1 Comment

GilliVilla Over a year ago

No. Errors out.

Lalji Dhameliya · Accepted Answer · 2016-10-19 05:13:27Z

You can DeserializeObject using JsonConvert and you also specified its settings for format of json data.like

      var settings = new JsonSerializerSettings
        {
            ContractResolver = new CamelCasePropertyNamesContractResolver(),
            NullValueHandling = NullValueHandling.Ignore,
            DateParseHandling = DateParseHandling.None
        };
       List<Claim> claims =JsonConvert.DeserializeObject<List<Claim>>(serializedClaims, settings);

using this setting you can ignore the null value and provide date parse handling

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