Returning JSON Errors from Asp.Net MVC 6 API
One way to achieve your scenario is to write an ExceptionFilter and in that capture the necessary details and set the Result to be a JsonResult.
// Here I am creating an attribute so that you can use it on specific controllers/actions if you want to.public class CustomExceptionFilterAttribute : ExceptionFilterAttribute{ public override void OnException(ExceptionContext context) { var exception = context.Exception; context.Result = new JsonResult(/*Your POCO type having necessary details*/) { StatusCode = (int)HttpStatusCode.InternalServerError }; }}You can add this exception filter to be applicable to all controllers.Example:
app.UseServices(services =>{ services.AddMvc(); services.Configure<MvcOptions>(options => { options.Filters.Add(new CustomExceptionFilterAttribute()); });.....}Note that this solution does not cover all scenarios...for example, when an exception is thrown while writing the response by a formatter.