I have a webapi that returns some Json:
{"id":9,"businessName":"dummy","address":"pluto","products":[
{"id":762,"description":"Centralized needs-based website","price":1281.24,"stock":1600,"categories":[],"factory":null},
{"id":1027,"description":"Realigned 6th generation knowledge base","price":2398.16,"stock":19583,"categories":[],"factory":null},
{"id":1392,"description":"User-centric zero administration array","price":998.07,"stock":6124,"categories":[],"factory":null},
{"id":1800,"description":"Team-oriented reciprocal core","price":4422.95,"stock":17372,"categories":[],"factory":null},
{"id":2763,"description":"Sharable needs-based hierarchy","price":4122.98,"stock":17397,"categories":[],"factory":null},
{"id":6189,"description":"Re-engineered hybrid emulation","price":395.09,"stock":532,"categories":[],"factory":null}
]}
I then try to deserialize using:
using var response = await _httpClient.GetAsync($"{GetApiRouteFromEntity(entity)}/{entity.GetId()}");
response.EnsureSuccessStatusCode();
var responseContent = await response.Content.ReadAsStringAsync();
T? item = JsonSerializer.Deserialize<T>(responseContent);
but this gives me an empty Factory with id 0 and all the other attributes to null
Factory.cs
public class Factory : EntityBase
{
[DisplayName("ID")]
public int Id { get; set; }
[DisplayName("Nome Business")]
public string? BusinessName { get; set; }
[DisplayName("Indirizzo")]
public string? Address { get; set; }
[DisplayName("Prodotti")]
public virtual ICollection<Product> Products { get; set; }
public override string ToString()
{
return $"[{Id}] {BusinessName}";
}
}
Product.cs
public class Product : EntityBase
{
[DisplayName("ID")]
public int Id { get; set; }
[DisplayName("Descrizione")]
public string? Description { get; set; }
[DisplayName("Prezzo")]
public float Price { get; set; }
[DisplayName("Magazzino")]
public int Stock { get; set; }
[DisplayName("Categorie")]
public virtual ICollection<Category> Categories { get; set; }
[DisplayName("Fabbrica")]
public virtual Factory Factory { get; set; }
public override string ToString()
{
return $"[{Id}] {Description}";
}
}
EntityBase.cs
public abstract class EntityBase
{
public virtual object GetId()
{
return GetType().GetProperty("Id").GetValue(this);
}
}
i guess its because the factory prop in the products is null but idk how to work around that
CodePudding user response:
From the docs:
By default, property names and dictionary keys are unchanged in the JSON output, including case.
You can specify the property naming policy:
T? item = JsonSerializer.Deserialize<T>(responseContent, new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase
});
to use camel case for all JSON property names, or mark all needed properties with JsonPropertyNameAttibute
containing correct name:
public class Factory : EntityBase
{
[DisplayName("ID")]
[JsonPropertyName("id")] // and so on
public int Id { get; set; }
....
}
CodePudding user response:
The JSON keys are all camel case but the props in your classes are written in pascal case. E.g. businessName
vs. BusinessName
. Hence JsonSerializer can't match them.
You can initialize the serializer like this to ignore the differences in casing:
var options = new JsonSerializerOptions
{
PropertyNameCaseInsensitive = true
};
T? item = JsonSerializer.Deserialize<T>(responseContent, options);
See the docs for further info: https://docs.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-character-casing