ASP.NET Core 3 - 使用 NLog 记录不会记录异常

Question

I'm using the ASP.NET Core logger along with NLog. When I log an error/critical with an exception, the message is logged but the exception doesn't.

try
{
    // my code throws an exception
}
catch (Exception ex)
{
    _logger.LogError($"There was an error", ex);
    return null;
}

My NLog configuration looks like this:

<target xsi:type="File" name="ApiLogger" fileName="Logs\api-${shortdate}.log"
        layout="${longdate} - ${uppercase:${level}} - ${threadid} - ${logger} - ${message} ${exception:innerFormat=Message,StackTrace}" />

Whats logged in the file is There was an error without the actual exception and stacktrace.

Answer 1

The correct syntax that you want for an ASP.NET Core logger is

ILogger.LogError(Exception exception, string message);

The code written is using the extension method

ILogger.LogError(string message, params object[] args);

This means you should try using this instead:

try
{
    // my code throws an exception
}
catch (Exception ex)
{
    _logger.LogError(ex, "There was an error");
    return null;
}