Web API serialize properties starting from lowercase letter

Question

How can I configure serialization of my Web API to use camelCase (starting from lowercase letter) property names instead of PascalCase like it is in C#.

Can I do it globally for the whole project?

Answer 1

If you want to change serialization behavior in Newtonsoft.Json aka JSON.NET, you need to create your settings:

var jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings  {      ContractResolver = new CamelCasePropertyNamesContractResolver(),     NullValueHandling = NullValueHandling.Ignore // ignore null values }); 

You can also pass these settings into JsonConvert.SerializeObject:

JsonConvert.SerializeObject(objectToSerialize, serializerSettings); 

For ASP.NET MVC and Web API. In Global.asax:

protected void Application_Start() {    GlobalConfiguration.Configuration       .Formatters       .JsonFormatter       .SerializerSettings       .ContractResolver = new CamelCasePropertyNamesContractResolver(); } 

Exclude null values:

GlobalConfiguration.Configuration     .Formatters     .JsonFormatter     .SerializerSettings     .NullValueHandling = NullValueHandling.Ignore; 

Indicates that null values should not be included in resulting JSON.

ASP.NET Core

ASP.NET Core by default serializes values in camelCase format.