ObjectResult

ObjectResult is a class in ASP.NET Core that represents an HTTP response with a specified status code and a given object as the response body. It is part of the Microsoft.AspNetCore.Mvc namespace. When an action method in an ASP.NET Core controller returns an ObjectResult, the framework serializes the provided object into the response body, typically in JSON or XML format, depending on the client's requested content type or the application's configuration.

The primary purpose of ObjectResult is to provide a flexible way to return custom data structures or specific HTTP status codes along with that data. Developers can instantiate ObjectResult directly, passing the desired object and an integer status code. For example, returning new ObjectResult(userData, 200) would create a successful response with the userData object.

ASP.NET Core also provides several derived classes and helper methods that simplify common scenarios. For instance, OkObjectResult is a convenience class for returning a 200 OK status code with an object. Similarly, NotFoundResult is used for a 404 Not Found response, and BadRequestObjectResult for a 400 Bad Request with an object. These derived types enhance code readability and reduce the need for manual instantiation of ObjectResult with standard status codes.

ObjectResult plays a crucial role in API development, enabling controllers to communicate structured data and appropriate HTTP status information back to the client. It bridges the gap between application logic and the HTTP protocol, allowing for well-formed and informative API responses.