Global exception handling with Web API 2

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Global exception handling with Web API 2

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#1 by (1 votes)
#2 by (0 votes)

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I want to use Global Error Handling with WebAPI 2.

I created a new project, inside it I created the following class:

ErrorLogTest.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Web;
using System.Web.Http.ExceptionHandling;

namespace ApiTesteErro
{
    public class ErroLogTeste : ExceptionLogger
    {
        public override void Log(ExceptionLoggerContext context)
        {
            Trace.TraceError(context.ExceptionContext.Exception.ToString());
        }
    }
}

Then I changed the control Home as follows:

HomeController.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ApiTesteErro.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.Title = "Home Page";

            int x;
            var a = "j";

            x = Convert.ToInt16( a);

            return View();
        }
    }
}

I added the service in WebApiConfig:

WebApiConfig.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.ExceptionHandling;

namespace ApiTesteErro
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services
            GlobalConfiguration.Configuration.Services.Add(typeof(IExceptionLogger), new ErroLogTeste());

            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}

I also tried with config.Services.Add(typeof(IExceptionLogger), new ErroLogTeste()); and it did not work

When I squeeze it out of error in x = Convert.ToInt16( a); , but it does not execute anything in my ErroLogTeste class.

What else do I need to do to run the log?

c# asp.net-web-api

asked by anonymous 31.05.2015 / 22:35

2 answers

c #: using threads in a "windows forms" project Create database via command line and overwrite existing

score 1 · Answer 1

You should register like this:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.Services.Add(typeof(IExceptionLogger), new ErroLogTeste());

        ...
    }
}

Since you did not mention anything, I think you were missing setting up trace listeners . Simply calling Trace.TraceError does not register anywhere by default.

score 0 · Answer 2

Add this here after logging the routes.

It will stay like this

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.ExceptionHandling;

namespace ApiTesteErro
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services
            GlobalConfiguration.Configuration.Services.Add(typeof(IExceptionLogger), new ErroLogTeste());

            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
            config.Filters.Add(new ExceptionHandlingAttribute()); 
        }
    }
}