# Serilog

https://serilog.net/

# 安裝套件

dotnet add package Serilog --version 3.1.1
dotnet add package Serilog.Sinks.Console --version 5.0.1
dotnet add package Serilog.AspNetCore --version 8.0.0
dotnet add package Serilog.Settings.Configuration
dotnet add package Serilog.Sinks.Elasticsearch --version 9.0.3

# appsetting.json

{
  "Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Microsoft": "Information",
        "System": "Information"
      }
    },
    "Using": ["Serilog.Sinks.Console", "Serilog.Sinks.Elasticsearch"],
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",
          "outputTemplate": "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj} <s:{SourceContext}>{NewLine}{Exception}"
        }
      },
      {
        "Name": "Elasticsearch",
        "Args": {
          "nodeUris": "http://localhost:9200",
          "indexFormat": "slog-{0:yyyy.MM}"
        }
      }
    ]
  },
  "AllowedHosts": "*"
}

# Program.cs

using Serilog;

var builder = WebApplication.CreateBuilder(args);

builder.Host.UseSerilog();

// Add services to the container.
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddControllers();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseSerilogRequestLogging();

app.MapControllers();
app.Run();

# Controller

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace w2.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class HomeController : ControllerBase
    {
        private readonly ILogger<HomeController> log;
        public HomeController(ILogger<HomeController> log)
        {
            this.log = log;
        }

        [HttpGet]
        public string Hello()
        {
            this.log.LogInformation("hello");
            return "hello";
        }
    }
}