Log event datetime with.Net Core Console logger

Question

I\'m using logging to Console output, that built-in to .Net Core framework. Here initialization of the logger:

var serviceCollection = new ServiceCollection();
s         


        

Answer 1

Example in .NET 5 (ASP.NET Core):

public void ConfigureServices(IServiceCollection services)
{
    services.AddLogging(options =>
    {
        options.AddSimpleConsole(c =>
        {
            c.TimestampFormat = "[yyyy-MM-dd HH:mm:ss] ";
            // c.UseUtcTimestamp = true; // something to consider
        });
    });

    // ...
}

Output example:

[2020-12-13 12:55:44] info: Microsoft.Hosting.Lifetime[0] Application is shutting down...

Answer 2

The feature was added into version 3 of the Microsoft.Extensions.Logging.Console(here is the pr). You can activate this with setting the TimestampFormat:

  new ServiceCollection()
     .AddLogging(opt =>
     {
         opt.AddConsole(c =>
         {
            c.TimestampFormat = "[HH:mm:ss] ";
         });
    })

Answer 3

Built-in .NET Core console logger doesn't log date-time. Track this issue to get more details. The easiest workaround is:

logger.Log(LogLevel.Information, 1, someObj, null, (s, e) => DateTime.Now + " " + s.ToString());

I wrote a custom console logger to automatically log the timestamp and do other useful tricks:

[2017.06.15 23:46:44] info: WebHost[1]      Request starting HTTP/1.1 GET http://localhost:6002/hc