C# 如何调查：应用程序引发了未处理的异常

Question

Hi I am getting the following error in my asp.net core logs:

Microsoft.AspNetCore.Server.Kestrel|Connection id "XXXXX", Request id "YYYY:0000": An unhandled exception was thrown by the application.

Struggling to see how to investigate this further - how can I track down what is causing this? Is there any additional logging I can enable?

Answer 1

You will need to decorate your code with try/catch:

try
{
    //code logic goes here
}
catch(Exception ex)
{
    //handle exception here
    //ex.Message - this will give you string description of the exception
    //ex.InnerException - this will provide you more details when you debug 
    //and have a break point in the exception section then you can view 
    //more details on the exception
}

I hope this helps.

Answer 2

You can't catch this exception it is just logged. See for example source code . In vs you can set a functional breakpoint and load the symbols where needed. Then you can set more breakpoints where needed.

Answer 3

You can try using the ILogger from the Microsoft.Extensions.Logging , using the Method LogError.

https://learn.microsoft.com/en-us/do.net/api/microsoft.extensions.logging.loggerextensions.logerror?view=do.net-plat-ext-7.0

You will need to set the Log to output where you prefer, in the link bellow you can see the basic settings.

https://learn.microsoft.com/en-us/as.net/core/fundamentals/logging/?view=as.netcore-7.0

In addition, if possible to debug, you can just enable more Exception setting while debugging.

At the bottom of the Visual Studio, this tab will appear, just enabled more options until a more specific exception appears.