How to log error detail in nlog with custom error handling in asp.net?

Raj

648 Points

26 Posts

I have asp.net mvc application with custom error pages:

<customErrors mode="On" defaultRedirect="Error/SomethingGoingWrong">
  <error statusCode="500" redirect="Error/SomethingGoingWrong" />
  <error statusCode="404" redirect="Error/PageNotFound" />
</customErrors>

Cusom error pages are working fine. But I want to log error trace throw nlog and trying something in error action:

public class ErrorController : Controller
{
    public ActionResult Error()
    {
        var ex = Server.GetLastError();
        logger.Fatal(ex, $"{ex?.Message}");
        ......
    }
}

But always getting ex=null.

Views: 2493
Total Answered: 2
Total Marked As Answer: 1
Posted On: 08-Jun-2020 03:30

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Answers

Brian

2376 Points

13 Posts

I think, you can use redirectMode="ResponseRewrite" as

<customErrors mode="On" defaultRedirect="Error/SomethingGoingWrong" redirectMode="ResponseRewrite">
  <error statusCode="500" redirect="Error/SomethingGoingWrong" />
  <error statusCode="404" redirect="Error/PageNotFound" />
</customErrors>

Posted On: 12-Jun-2020 22:35

Rashmi

1068 Points

19 Posts

We use Global.aspx.cs to log all kind error as:

void Application_Error(object sender, EventArgs e)
{
    var _logger = LogManager.GetCurrentClassLogger();
    var ex = HttpContext.Current.Server.GetLastError();
    _logger.Fatal(ex, $"{ex?.Message}");
}

Posted On: 12-Jun-2020 22:42