全局错误捕捉器 [英] Global Error Catcher

问题描述

在我的项目中，我想将应用程序中发生的所有错误记录在数据库表中.我使用try catch块捕获了几乎所有错误，但无法捕获4xx和5xx之类的全局错误.

In my project I want to log all the errors happen in the application in a database table. I catch almost all errors using try catch blocks, but I cannot catch the global errors like 4xx and 5xx.

在某些情况下，例如当我键入不存在的url时，应用程序不会重定向到Startup.cs的Configure方法中定义的异常处理程序.

There are cases that the application does not redirect to the Exception Handler defined in the Configure method of the Startup.cs like when I type a url which does not exist.

app.UseExceptionHandler("/Error");

是否可以捕获应用程序中发生的所有未处理的错误?

Is there a way to catch all the unhandled errors occurred in my application?

推荐答案

您可以创建自己的异常过滤器，该过滤器实现

You could create your own Exception filter, which implements IExceptionFilter e.g.:

public class GlobalExceptionFilter : IExceptionFilter
{
    ILogger<GlobalExceptionFilter> logger = null;

    public GlobalExceptionFilter(ILogger<GlobalExceptionFilter> exceptionLogger)
    {
        logger = exceptionLogger;
    }

    public void OnException(ExceptionContext context)
    {
        // log the exception
        logger.LogError(0, context.Exception.GetBaseException(), "Exception occurred.");
    }
}

然后可以按如下所示在ConfigureServices方法中添加此过滤器:

You can then add this filter in your ConfigureServices method as follows:

services.AddMvc(o => { o.Filters.Add<GlobalExceptionFilter>(); });

这将捕获由于请求而发生的任何未处理的异常.对于404，您可以将以下内容添加到您的Configure方法中:

This will catch any unhanded exceptions that occur as the result of a request. For 404s you can add the following to your Configure method:

app.UseStatusCodePagesWithReExecute("/error/{0}");

然后您可以在ErrorController中记录状态代码.

You can then log the status code in your ErrorController.

有关更多信息，请参见 ASP中的错误处理简介. NET核心

For further information see Introduction to Error Handling in ASP.NET Core

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