Error handling (Sending ex.Message to the client)

Question

I have an ASP.NET Core 1.0 Web API application and trying to figure out how to pass the exception message to the client if a function that my controller is calling errors ou

Answer 1

You can create a custom Exception Filter like below

public class CustomExceptionFilterAttribute : ExceptionFilterAttribute
{
    public override void OnException(ExceptionContext context)
    {
        var exception = context.Exception;
        context.Result = new JsonResult(exception.Message);
    }
}

Then apply the above attribute to your controller.

[Route("api/[controller]")]
[CustomExceptionFilter]
public class ValuesController : Controller
{
     // GET: api/values
    [HttpGet]
    public IEnumerable Get()
    {
        throw new Exception("Suckers");
        return new string[] { "value1", "value2" };
    }
}