ExceptionFilter 不运行 .NET Core Web Api [英] ExceptionFilter doesn't run .NET Core Web Api

问题描述

我有操作过滤器的问题.我的过滤器都没有运行.我正在使用 .NET Core 2.2 并构建 Web Api.我在控制器中用 [CustomExceptionFilter] 注册了它:

I have problem with Action Filters. None of my filters run. I am using .NET Core 2.2 and building Web Api. I registered it with [CustomExceptionFilter] in controller:

[HttpDelete("{id}")]
[CustomExceptionFilter]
public IActionResult Delete(int id)
        {
                var piano = _repository.GetPianoById(id);
                if (piano == null) throw new Exception(); 
                _repository.Delete(id);
                return Ok();
        }

这是我的异常过滤器:

using System.Web.Http.Filters;

public class CustomExceptionFilter : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        HttpStatusCode status = HttpStatusCode.InternalServerError;
        String message = String.Empty;
        var exceptionType = actionExecutedContext.Exception.GetType();
        if (exceptionType == typeof(Exception))
        {
            message = "Incorrect ID.";
            status = HttpStatusCode.NotFound;
        }

        actionExecutedContext.Response = new HttpResponseMessage()
        {
            Content = new StringContent(message, System.Text.Encoding.UTF8, "text/plain"),
            StatusCode = status
    };
        base.OnException(actionExecutedContext);
}

有什么问题?

推荐答案

我不确定你的例子有什么问题，但我就是这样做的.

I am not sure what is wrong with your example, but this is how I have done it.

首先是异常过滤器:

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

public class CustomExceptionFilterAttribute : ExceptionFilterAttribute
{
    public override void OnException(ExceptionContext context)
    {

然后我将过滤器添加到整个控制器，而不仅仅是一个动作，尽管这也可能有效——我从未尝试过:

I then add the filter to the whole controller, not just an action, although that might work too--I have never tried it:

[ServiceFilter(typeof(CustomExceptionFilterAttribute))]
public class MyController : ControllerBase
{

并在 Startup.cs、ConfigureServices 中添加 DI 支持:

And in Startup.cs, ConfigureServices, add DI support:

services.AddScoped<CustomExceptionFilterAttribute>();

这个 博客 更详细.

这篇关于ExceptionFilter 不运行 .NET Core Web Api的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！