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CSharp Parse JSON

How to Parse a JSON with C#

Let a JSON be:

  {
  "access_token": "2564231sdfsdf1sd",
  "expires_in": 3600,
  "token_type": "Bearer"
  }


There are at least two ways I know to access to the values with C#:
  1. With the Deserialization way
  2. With the JSON PAth Query way
Both of them requires you to install and reference https://www.newtonsoft.com/json

The Deserialization way

With this method, you have to define a class that match the JSON and then perform the deserialisation:

  using Newtonsoft.Json;
  using Newtonsoft.Json.Serialization;
  // You probably need more
  namespace SSFS
  {
    public class Token{
      public string access_token {get; set;}
      public int expires_in {get; set;}
      public string token_type {get; set;}
    }
    public class Utils {
      string jsonString = @"{
        "access_token": "2564231sdfsdf1sd",
        "expires_in": 3600,
        "token_type": "Bearer"}";
        
      string getTokenValue(){
        Token j = JsonConvert.DeserializeObject(jsonString);
        return j.access_token;
      }
    }
  }


JSON PAth Query way

With this method, you have to parse the JSON then perform the Query

  using Newtonsoft.Json;
  using Newtonsoft.Json.Serialization;
  using Newtonsoft.Json.Linq;
  // You probably need more
  namespace SSFS
  {
    public class Utils {
      string jsonString = @"{
        "access_token": "2564231sdfsdf1sd",
        "expires_in": 3600,
        "token_type": "Bearer"}";
        
      string getTokenValue(){
        JObject o = JObject.Parse(jsonString);
        string accessToken = (string)o.SelectToken("access_token");    
        return accessToken;
      }
    }
  }


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