C
C#•8h ago
Rodonies

Dependency Injection Logging: AddDebug() works but AddSerilog() doesn't.

Hi, I am using Microsoft.Extensions.DependencyInjection and Serilog I invoke the following on a serviceCollection: 
serviceCollection.AddLogging(builder =>
{
    LoggerConfiguration loggerConfig = new LoggerConfiguration()
    .Enrich.FromLogContext()
    .WriteTo.File("logs/log.txt", rollingInterval: RollingInterval.Day, retainedFileTimeLimit: TimeSpan.FromDays(31));

    builder.AddSerilog(loggerConfig.CreateLogger());
    builder.AddDebug();
})
serviceCollection.AddLogging(builder =>
{
    LoggerConfiguration loggerConfig = new LoggerConfiguration()
    .Enrich.FromLogContext()
    .WriteTo.File("logs/log.txt", rollingInterval: RollingInterval.Day, retainedFileTimeLimit: TimeSpan.FromDays(31));

    builder.AddSerilog(loggerConfig.CreateLogger());
    builder.AddDebug();
})
This is how I get a logger from the constructor: 
public MainViewModel(ILogger<MainViewModel> logger) {
  _logger = logger;
  _logger.LogDebug("{Message}", "INIT MainViewModel");
}
public MainViewModel(ILogger<MainViewModel> logger) {
  _logger = logger;
  _logger.LogDebug("{Message}", "INIT MainViewModel");
}
I see that message appear in the debug window but Serilog does not make the file, however if I change 
.WriteTo.File("logs/log.txt", rollingInterval: RollingInterval.Day, retainedFileTimeLimit: TimeSpan.FromDays(31));
.WriteTo.File("logs/log.txt", rollingInterval: RollingInterval.Day, retainedFileTimeLimit: TimeSpan.FromDays(31));
to 
.WriteTo.File("logs/log.txt");
.WriteTo.File("logs/log.txt");
Serilog actually creates the file, but it doesn't write anything to it, which makes me think I actually am using this correctly? I found something that says you need to convert the Serilog's logger to a Microsoft.Extensions.Logging.ILogger, but that solution is for ASP.NET and I'm not sure if it applies since that HostBuilder is not used in WPF
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2 Replies
Jimmacle
Jimmacle•7h ago
it seems wrong that you're trying to add 2 different logging services, if you want logging to the debug console that should be configured as a serilog sink and not as a separate logging service e.g. loggerConfig.WriteTo.Debug();
Rodonies
RodoniesOP•6h ago
I primarily want a log file, but Serilog on it's own didn't work. nothing changes when I remove 
builder.AddDebug();
builder.AddDebug();
I only added this line afterwards to see if the logger actually worked, since I couldn't get Serilog to work

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