How to get id exist inside user object in claim on jwt ?

Question

User696604810 posted

i work on asp.net core 2.2

i have access token encrypted and i need to get id o user from it

so that i do following code

var handler = new JwtSecurityTokenHandler();
                var jsonToken = handler.ReadJwtToken(AccessToken);
          
                var user = jsonToken.Claims.First(claim => claim.Type == "user").Value;

result of  jsonToken = {{"alg":"none","typ":"JWT"}.{"user":{"id":"Admin"}}}

this line of code exist below 

var user = jsonToken.Claims.First(claim => claim.Type == "user").Value;

return {"id":"admin"}

i need to get value of id meaning i need to return Admin

how to do that please ?

Answer 1

User711641945 posted

Hi ahmedbarbary,

You could convert user string to JObject and get the children like below:

var user = jsonToken.Claims.First(claim => claim.Type == "user").Value;
var obj = JObject.Parse(user);
var id = obj.Children().Children();

Best Regards,

Rena

Answer 2

User696604810 posted

thank you for reply 

it not give me value it give me id only

i need value of id that represent Admin

when debug the result of last line of var id is

id = {Newtonsoft.Json.Linq.JEnumerable<Newtonsoft.Json.Linq.JToken>}

Answer 3

User696604810 posted

i modify that 

i make 

var id  = obj.Children().Children()[0].Value<string>();

i get exception source must be jtoken

Answer 4

User711641945 posted

Hi ahmebarbary,

You could modify like below to get the data:

var obj = JObject.Parse(user);
var id = obj.Children().Children().First().ToString();

Best Regards,

Rena