CODEWITHSUNDEEP
c#json.netsystem.text.jsonasp.net-core-6.0
PhilipRaets
PhilipRaets

Reputation: 123

deserialize json to object with a dictionary System.Text.Json

I am working on a .Net 6.0 project, and I want to migrate from Newtonsoft.Json to System.Text.Json. So far most is working, except the following:

I've got this json:

[
   {
      "Key":"ValidateRequired",
      "LocalizedValue":{
         "fr-FR":"Ce champ est obligatoire.",
         "en-GB":"This field is required.",
         "nl-BE":"Dit is een verplicht veld.",
         "de-DE":"Dieses Feld ist ein Pflichtfeld."
      }
   },
   {
      "Key":"ValidateEmail",
      "LocalizedValue":{
         "fr-FR":"Veuillez fournir une adresse électronique valide.",
         "en-GB":"Please enter a valid email address.",
         "nl-BE":"Vul hier een geldig e-mailadres in.",
         "de-DE":"Geben Sie bitte eine gültige E-Mail-Adresse ein."
      }
   },
   {
      "Key":"ValidateUrl",
      "LocalizedValue":{
         "fr-FR":"Veuillez fournir une adresse URL valide.",
         "en-GB":"Please enter a valid URL.",
         "nl-BE":"Vul hier een geldige URL in.",
         "de-DE":"Geben Sie bitte eine gültige URL ein."
      }
   }
]

Which I am trying to store into the following:

public class Translations
{
    public string Key { get; set; }

    public Dictionary<string, string> LocalizedValue = new();
}

When I am deserializing using Newtonsoft.JSON, the dictionary gets populated just fine with the values from LocalizedValue

jsonlocalization = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Translations>>(jsonString);

but when I try to use System.Text.Json, the dictionary stays empty

jsonlocalization = System.Text.Json.JsonSerializer.Deserialize<List<Translations>>(jsonString);

How can I use System.Text.Json and populate the dictionary?

Upvotes: 12

Views: 19425

Answers (2)

Saleh Jafarli
Saleh Jafarli

Reputation: 61

JsonSerializerOptions class has IncludeFields property which can be used to deserialize to field variables

Upvotes: 3

Richard Deeming
Richard Deeming

Reputation: 31238

The System.Text.Json library doesn't deserialize to fields. If you change your class to use a property instead, your sample JSON will deserialize as expected.

public class Translations
{
    public string Key { get; set; }
    public Dictionary<string, string> LocalizedValue { get; set; } = new();
}

Upvotes: 18

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