全局异常处理Web Api 2

Question

我正在尝试弄清楚如何在.NET WebApi2中实现全局异常处理程序。

我尝试遵循微软在这里提供的示例：https://docs.microsoft.com/en-us/aspnet/web-api/overview/error-handling/web-api-global-error-handling

但当异常发生时，它什么也不做。

这是我的代码：

public class GlobalExceptionHandler : ExceptionHandler
    {
        public override void Handle(ExceptionHandlerContext context)
        {
            Trace.WriteLine(context.Exception.Message);

            context.Result = new TextPlainErrorResult
            {
                Request = context.ExceptionContext.Request,
                Content = "Oops! Sorry! Something went wrong." +
                          "Please contact support@testme.com so we can try to fix it."
            };
        }

        private class TextPlainErrorResult : IHttpActionResult
        {
            public HttpRequestMessage Request { private get; set; }

            public string Content { private get; set; }

            public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
            {
                var response =
                    new HttpResponseMessage(HttpStatusCode.InternalServerError)
                    {
                        Content = new StringContent(Content),
                        RequestMessage = Request
                    };
                return Task.FromResult(response);
            }
        }
    }

有没有更好的方法(或更合适的方法)来实现全局异常处理程序？

Answer 1

尝试将其添加到您的WebApiConfig

webConfiguration.Services.Replace(typeof(IExceptionHandler), new MyExceptionHandler()); // You have to use Replace() because only one handler is supported

webConfiguration.Services.Add(typeof(IExceptionLogger), new MyExceptionLogger()); // webConfiguration is an instance of System.Web.Http.HttpConfiguration

Answer 2

你错过了

class GlobalExceptionHandler : ExceptionHandler
{
    public override bool ShouldHandle(ExceptionHandlerContext context)
    {
        return true;
    }
    //...
}

请参阅WebApi v2 ExceptionHandler not called