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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?

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3
  • What JSON serializer/deserializer are you using? For example, if JsonProperty is part of Newtonsoft but the application is using System.Text.Json then the two are not interchangeable. They have different attributes. Commented Aug 8, 2024 at 17:33
  • @David I am using Newtonsoft.Json JsonConvert.DeserializeObject<List<MyApp>>(response.Content) Commented Aug 8, 2024 at 17:38
  • 1
    In that case I'm not able to replicate the issue: dotnetfiddle.net/ktjzW5 Commented Aug 8, 2024 at 17:43

1 Answer 1

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0

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));
    });
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3 Comments

Hi @waqas I am using Newtonsoft.json deserializing using JsonConvert.DeserializeObject<List<MyApp>>(response.Content)
not able to replicate, could you please share how have you setup your API and .csproj file. directly calling serialize/deserialize works fine.
In my model i removed namespace Newtonsoft.Json and used System.text.json.serialization namespace and used [JsonPropertyName("App Name")] attiribute and this fixed the issue.

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