Simple Logger (NLog)

November 8, 2019 13:42

Simple Logger with NLog (edit)

Logger.cs

public static class Utils
{
    public static void WriteLog(string msg)
    {
        try
        {
            //Path log folder
            string folder = GetDesktopFolder();

            //Path log file
            string path = folder + "\\MyApp.log";

            // This text is added only once to the file.
            if (!File.Exists(path))
            {
                // Create a file to write to.
                using (StreamWriter sw = File.CreateText(path))
                {
                    sw.WriteLine(msg);
                }
            }

            // This text is always added, making the file longer over time
            // if it is not deleted.
            using (StreamWriter sw = File.AppendText(path))
            {
                sw.WriteLine(msg);
            }
        }
        catch (Exception e)
        {
            Debug.WriteLine("Exception: " + e.ToString());
        }
        finally
        {
            Debug.WriteLine("Executing finally block.");
        }
    }

    public static string GetDesktopFolder()
    {
        string strDesktopFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        return strDesktopFolderPath;
    }
}

Program.cs

try
{
    Utils.WriteLog("Program called.");
    Utils.WriteLog(string.Format("Start time: {0}", (start != null ? start.ToString() : "NULL")));
    Utils.WriteLog(string.Format("End time: {0}", (end != null ? end.ToString() : "NULL")));
}
catch
{

}

NLog in ASP.NET Web API 2.1

https://code-maze.com/net-core-web-development-part3/

https://www.c-sharpcorner.com/article/introduction-to-nlog-with-asp-net-core2/

https://github.com/jignesht24/Aspnetcore/tree/master/Logging%20with%20.net%20core%202.0/Using%20Nlog

https://dotnetthoughts.net/using-nlog-in-aspnet-core/

https://edi.wang/post/2017/11/1/use-nlog-aspnet-20

https://www.c-sharpcorner.com/article/introduction-to-nlog-with-asp-net-core2/ (NLog with .NET Core)

Install-Package NLog
Install-Package NLog.Web.AspNetCore

1./ File nlog.config

<?xml version="1.0"?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  autoReload="true"
  internalLogLevel="Warn"
  internalLogFile="c:\temp\internal-nlog.txt">

  <extensions>
    <add assembly="NLog.Web.AspNetCore"/>
  </extensions>

  <targets>
    <target name="allfile" xsi:type="File"
      fileName="${basedir}\Logging\${shortdate}.log"
      encoding="utf-8"
      layout="[${longdate}][${machinename}][${level}] ${message} ${exception}" />
  </targets>
  <rules>
    <!--All logs, including from Microsoft-->
    <logger name="*" minlevel="Trace" writeTo="allfile" />

    <!--Skip Microsoft logs and so log only own logs-->
    <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
    <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
 </rules>
</nlog>

2./ Config in Program.cs

public class Program  
{  
    public static void Main(string[] args)  
    {
        CreateWebHostBuilder(args).Build().Run();
    }

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>  
        WebHost.CreateDefaultBuilder(args)  
            .UseStartup()  
            .ConfigureLogging(logging =>  
            {  
                logging.ClearProviders();  
                logging.SetMinimumLevel(LogLevel.Information);  
            })  
            .UseNLog();  
}

3./ Using NLog in ValuesController

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using System.IO;
using System.Threading.Tasks;

namespace AspNetCoreWebApi.Controllers
{
    [ApiController]
    public class ValuesController : ControllerBase
    {
      private readonly ILogger<ValuesController> _logger;

    public ValuesController(ILogger<ValuesController> logger)
    {
      _logger = logger;

      _logger.LogInformation("ValuesController called.");
    }
}