asp.net core 1.0 web api use camelcase

Question

On RC2 the same code returns json format with camel case. After netcore 1.0 release i started new project and the same code is returning json in lowercase.

Tried multiple solutions but none of them were working web-api-serialize-properties-starting-from-lowercase-letter

score 110 · Accepted Answer · edited Nov 15 '17 at 14:15

110

services
    .AddMvc()
    .AddJsonOptions(options =>
    {
        options.SerializerSettings.ContractResolver
            = new Newtonsoft.Json.Serialization.DefaultContractResolver();
    });

This keeps a JSON object's name the same as .NET class property.

edited Nov 15 '17 at 14:15

Massimiliano Kraus

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answered Jul 01 '16 at 12:00

Brivvirs

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What namespace/references does this require. There is no 'AddJsonOptions' that I'm able to see – Kyle Gobel Sep 11 '16 at 01:50
Its MVC6.namespace Microsoft.Extensions.DependencyInjection // Extensions methods for configuring MVC via an Microsoft.Extensions.DependencyInjection.IMvcBuilder. class MvcJsonMvcBuilderExtensions – Brivvirs Sep 11 '16 at 19:46
thanks !! i have the same Problem this one work fine – Floxy Mar 20 '18 at 04:53
Works fine. Thanks. – ibrahimozgon Nov 02 '18 at 09:38

score 36 · Answer 2 · answered Jul 01 '16 at 07:47

36

You can configure JSON behavior this way:

public void ConfigureServices(IServiceCollection services)  
  {
      services.AddMvc()
                  .AddJsonOptions(options =>
                  {
                      options.SerializerSettings.ContractResolver =
                          new CamelCasePropertyNamesContractResolver();
                  });
  }

answered Jul 01 '16 at 07:47

Siavash Rostami

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this actually now is the default behavior (unfortunately), he wanted Default, as is, no change in property names, case – Omu Jul 21 '16 at 18:51
2

@Omu These actually aren't the same (in .net core 2.0 anyway). The *DefaultContractResolver* will accept CamelCase and return TitleCase, the *CamelCasePropertyNamesContractResolver* accepts and returns CamelCase. – JMK Dec 10 '17 at 14:33
@Omu has this changed from .net core 1.x to 2.0 ? – Hinrich Jan 31 '18 at 10:49

score 0 · Answer 3 · answered Apr 30 '19 at 13:10

You can also do this at the individual serializer level, instead of at the global level.

For example, to return an object as JSON on a controller action method you can do this:

var jsonSerializerSettings = new JsonSerializerSettings { ContractResolver = new DefaultContractResolver() };

return new JsonResult(myObject, jsonSerializerSettings);

And the resulting JSON string will be in the expected PascalCase to match the .NET class/properties names

asp.net core 1.0 web api use camelcase

3 Answers3

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