How can I return camelcase json serialized by json net from asp net mvc controll


ASP.NET is a popular programming language used for building web applications. One common requirement in web development is to return JSON data from an ASP.NET MVC . In this article, we will explore how to return camelcase JSON serialized by JSON.NET from an ASP.NET MVC controller.


JSON.NET is a powerful JSON framework for .NET that provides various features for working with JSON data. To return camelcase JSON serialized by JSON.NET, we need to the JSON formatter in our ASP.NET MVC application.

To get started, let's assume we have a simple ASP.NET MVC controller with an action method that JSON data:

public  MyController : Controller
    public  GetData()
        var data = new { FirstName = "John", LastName = "Doe" };
        return Json(data, JsonRequestBehavior.AllowGet);

In the above code, we are returning an object with two properties: FirstName and LastName. By , ASP.NET MVC serializes this object using the JavaScriptSerializer, which does not support camelcasing of property names.

Configuring JSON.NET Formatter

To enable camelcasing of property names, we need to configure the JSON formatter to use JSON.NET of the default JavaScriptSerializer. We can do this by creating a custom JSON result class that inherits from the class and overrides the ExecuteResult method:

public class CamelCaseJsonResult : JsonResult
    public override void ExecuteResult(ControllerContext context)
        if (context == null)
             new ArgumentNullException(nameof(context));

        var response = context.HttpContext.Response;
        response.ContentType = "application/json";

        var serializedData = JsonConvert.SerializeObject(Data, new JsonSerializerSettings
            ContractResolver = new CamelCasePropertyNamesContractResolver()


In the above code, we are using the JsonConvert class from JSON.NET to serialize the data. We pass an instance of the CamelCasePropertyNamesContractResolver to the JsonSerializerSettings to enable camelcasing of property names.

Using the Custom JSON Result

Now that we have our custom JSON result class, we can use it in our controller action method:

public class MyController : Controller
    public ActionResult GetData()
        var data = new { FirstName = "John", LastName = "Doe" };
        return new CamelCaseJsonResult { Data = data };

By returning an instance of the CamelCaseJsonResult class, we ensure that the JSON data will be serialized with camelcased property names.


In this article, we have seen how to return camelcase JSON serialized by JSON.NET from an ASP.NET MVC controller. By configuring the JSON formatter and using a custom JSON result class, we can easily achieve this requirement. JSON.NET provides a flexible and powerful way to work with JSON data in ASP.NET applications.

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