ASP.NET Web Api - return JSON response with space in property names

Question

I want my ASP.NET Web API to return a JSON response with spaces in property names. Currently when I am testing it using Postman, I am getting response in this format:

[
  {
     "appId": 1,
     "appName": "app1"
  },
  {
     "appId": 2,
     "appName": "app2"
  }
]

But I would like my Web API to return the response in the format shown here, because in the FE I am reading the column names dynamically and displaying as it it just by converting it to uppercase

[
  {
     "appId": 1,
     "app Name": "app1"
  },
  {
     "appId": 2,
     "app Name": "app2"
  }
]

To achieve this, I tried converting my model to this format:

public class MyApp
{
   public int AppId {get; set;}
   
   [JsonProperty(PropertyName = "App Name")]
   public string AppName {get; set;}
}

But I still see that the response returned by my API uses the property as appName.

How can I get a JSON property with a space in them?

Answer 1

Are you using newtonsoft or System.Text.Json as default serialization. Try System.Text.Json attribute JsonPropertyName.

could you please share your code

DTO With JsonPropertyName Attribute

using System.Text.Json.Serialization;

public class UserDTO
{
    public Guid Id { get; init; }
    public string FirstName { get; set; }
    public string MiddleName { get; set; }
    public string LastName { get; set; }
    public string Phone { get; set; }
    public string Email { get; set; }
    [JsonPropertyName("Terms And Conditions Agreed")]
    public bool TermsAndConditionsAgreed { get; set; }
}

     

JSON Options Setup

builder.Services.Configure<JsonOptions>(opt =>
    {
        opt.SerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
        opt.SerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
        opt.SerializerOptions.PropertyNameCaseInsensitive = true;
        opt.SerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
        opt.SerializerOptions.Converters.Add(new JsonStringEnumConverter(JsonNamingPolicy.CamelCase));
    });