.Net Core ExceptionFilter

合集 - C#(14)

1..Net Core ActionFilter2023-07-082..Net Core ResourceFilter2023-07-093..Net Core Jwt鉴权授权2023-07-094..Net Core Mvc Razor 组件2023-07-135..Net Core Autofac2023-08-036..Net Core ActionFilter2023-08-05

7..Net Core ExceptionFilter2023-08-05

8..Net Core AlwaysRunResultFilter2023-08-039..Net Core EntityFrameCore2023-07-1910..Net Core 读取配置文件2023-07-1911..Net Core NLog+oracel2023-08-0312..Net Core MiddleWare2023-08-0313..Net Core WebApi2023-08-0814..Net Core gRpc调用2023-08-09

收起

目录

• 作用
• 实现
  • IExceptionFilter
  • IAsyncResourceFilter
• Demo
  • CustomExceptionFilterAttribute.cs
• 全局注册
  • Program.cs

作用

• 处理全局异常
• Authorization 和 ResourceFilter 中的异常捕捉不到

如果都设置执行顺序为:

1. Action -> 出现异常 -> Exception处理 -> 处理完成返回对应信息或页面

实现

IExceptionFilter

IExceptionFilter

1. 需要继承 Attribute 并 并实现 IExceptionFilter
2. 实现接口方法

执行顺序为:

1. 出现异常
2. OnException

IAsyncResourceFilter

IAsyncResourceFilter

1. 需要继承 Attribute 并 并实现 IAsyncExceptionFilter
2. 实现接口方法

执行顺序为:

1. 出现异常
2. OnExceptionAsync

Demo

CustomExceptionFilterAttribute.cs

using Microsoft.AspNetCore.Mvc.Filters;

namespace Cnpc.Com.Ioc.WebApp.Filter.Exception
{
    public class CustomExceptionFilterAttribute : Attribute, IAsyncExceptionFilter
    {
        ILogger<CustomExceptionFilterAttribute> logger;
        public CustomExceptionFilterAttribute(ILogger<CustomExceptionFilterAttribute> logger)
        {
            this.logger = logger;
        }
        public async Task OnExceptionAsync(ExceptionContext context)
        {
            if (!context.ExceptionHandled)
            {
                this.logger.LogError(context.Exception.Message, context.Exception.StackTrace);
            }
            //异常已经处理完成
            context.ExceptionHandled = true;
            await Task.CompletedTask;
        }
    }

 
}

全局注册

Program.cs

builder.Services.AddControllersWithViews(
options =>
{
    //这样注册将对所有action 都生效
    options.Filters.Add<CustomAsyncAlwaysRunResultFilterAttribute>();
}).AddControllersAsServices();