Serilog 记录日志

从 NuGet 安装 Serilog

核心的包是 Serilog 和 Serilog.AspNetCore
建议安装 Serilog.AspNetCore，几乎包含了Serilog常用的所有包
异步写入 Serilog.Sinks.Async
写入MSSQL  Serilog.Sinks.MSSqlServer  

Install-Package Serilog.AspNetCore
Install-Package Serilog
Install-Package Serilog.Sinks.Async
Install-Package Serilog.Sinks.MSSqlServer

 

日志输出

输出到控制台

 1 using Serilog;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.ComponentModel;
 5 using System.IO;
 6 using System.Linq; 7 8 namespace NetCoreConsoleApp 9 { 10 class Program 11  { 12 static void Main(string[] args) 13  { 14 Log.Logger = new LoggerConfiguration() 15 .WriteTo.Console() //输出到控制台 16  .CreateLogger(); 17 18 Log.Information("log"); 19 20  } 21 22 23  } 24 }

 

 

输出到本地日志文件

WriteTo.File详解（日志默认路径为当前程序路径）

     path：默认路径是程序的bin目录+path参数，当然也可以写绝对路径，只需要写入参数就可以了
     rollingInterval：创建文件的类别，可以是分钟，小时，天，月。 此参数可以让创建的log文件名默认 + 时间。例如：log20191219.log
     outputTemplate：日志模板，可以自定义
     retainedFileCountLimit：设置日志文件个数最大值，默认31，意思就是只保留最近的31个日志文件,等于null时永远保留文件

 

 1 using Serilog;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.ComponentModel;
 5 using System.IO;
 6 using System.Linq; 7 8 namespace NetCoreConsoleApp 9 { 10 class Program 11  { 12 static void Main(string[] args) 13  { 14 /* 15 WriteTo.File详解 16 path：默认路径是程序的bin目录+path参数，当然也可以写绝对路径，只需要写入参数就可以了 17 rollingInterval：创建文件的类别，可以是分钟，小时，天，月。 此参数可以让创建的log文件名 + 时间。例如log20191219.log 18 outputTemplate：日志模板，可以自定义 19 retainedFileCountLimit：设置日志文件个数最大值，默认31，意思就是只保留最近的31个日志文件,等于null时永远保留文件 20 */ 21 22 23 string SerilogOutputTemplate = "{NewLine}{NewLine}Date：{Timestamp:yyyy-MM-dd HH:mm:ss.fff}{NewLine}LogLevel：{Level}{NewLine}Message：{Message}{NewLine}{Exception}" + new string('-', 100); 24 25 Log.Logger = new LoggerConfiguration() 26 .MinimumLevel.Debug() // 所有Sink的最小记录级别 27 .WriteTo.Console() //输出到控制台 28 .WriteTo.File("00_Logs\\log.log", //$"{AppContext.BaseDirectory}00_Logs\log.log" 29  rollingInterval: RollingInterval.Day, 30  outputTemplate: SerilogOutputTemplate 31 //,retainedFileCountLimit: 31 32  ) 33  .CreateLogger(); 34 Log.Information("log"); 35  } 36  } 37 }

 

输出到本地日志文件（异步）

需要Serilog.Sinks.Async包，github详解路径：https://github.com/serilog/serilog-sinks-async

 

 1 using Serilog;
 2 
 3 namespace NetCoreConsoleApp
 4 {
 5     class Program
 6     {
 7         static void Main(string[] args) 8  { 9 //github详解路径：https://github.com/serilog/serilog-sinks-async 10 11 Log.Logger = new LoggerConfiguration() 12 .WriteTo.Async(a => a.File("00_Logs\\log.log", rollingInterval: RollingInterval.Day)) 13  .CreateLogger(); 14 Log.Information("log"); 15  Log.CloseAndFlush(); 16  } 17  } 18 }

 

不同的日志级别输出到不同的文件夹下

 

using Serilog;
using Serilog.Events;
using System;

namespace NetCoreConsoleApp
{
    class Program
    {
        static void Main(string[] args) { string LogFilePath(string LogEvent) => $@"{AppContext.BaseDirectory}00_Logs\{LogEvent}\log.log"; string SerilogOutputTemplate = "{NewLine}{NewLine}Date：{Timestamp:yyyy-MM-dd HH:mm:ss.fff}{NewLine}LogLevel：{Level}{NewLine}Message：{Message}{NewLine}{Exception}" + new string('-', 50); Log.Logger = new LoggerConfiguration() .Enrich.FromLogContext() .WriteTo.Console() .MinimumLevel.Debug() // 所有Sink的最小记录级别 .WriteTo.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Debug).WriteTo.File(LogFilePath("Debug"), rollingInterval: RollingInterval.Day, outputTemplate: SerilogOutputTemplate)) .WriteTo.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Information).WriteTo.File(LogFilePath("Information"), rollingInterval: RollingInterval.Day, outputTemplate: SerilogOutputTemplate)) .WriteTo.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Warning).WriteTo.File(LogFilePath("Warning"), rollingInterval: RollingInterval.Day, outputTemplate: SerilogOutputTemplate)) .WriteTo.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Error).WriteTo.File(LogFilePath("Error"), rollingInterval: RollingInterval.Day, outputTemplate: SerilogOutputTemplate)) .WriteTo.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Fatal).WriteTo.File(LogFilePath("Fatal"), rollingInterval: RollingInterval.Day, outputTemplate: SerilogOutputTemplate)) .CreateLogger(); Log.Information("log"); Log.Error("log"); } } }

 

输出到MSSQL 

需要Serilog.Sinks.MSSqlServer包，github详解路径：https://github.com/serilog/serilog-sinks-mssqlserver

参考链接：https://www.cnblogs.com/lonelyxmas/p/11980881.html

using Serilog;
using Serilog.Events;
using Serilog.Sinks.MSSqlServer;
using System;
using System.Collections.ObjectModel;
using System.Data; namespace ConsoleApp1 { class Program { static void Main(string[] args) { string connectionString = @"Server=....";string tableNameA = "LogsA"; string tableNameB = "LogsB"; string tableNameC = "LogsC"; static void Write() { Log.Information("测试信息"); Log.Error("Error"); Log.Write(LogEventLevel.Error, new Exception("错误"), "致命错误"); }; //A:默认配置 //autoCreateSqlTable为true 时 会自动创建日志表 Log.Logger = new LoggerConfiguration().WriteTo.MSSqlServer(connectionString, tableNameA, autoCreateSqlTable: true).CreateLogger(); Write(); //B:移除列 var options = new ColumnOptions(); options.Store.Remove(StandardColumn.Properties); options.Store.Remove(StandardColumn.MessageTemplate); Log.Logger = new LoggerConfiguration() .WriteTo.MSSqlServer(connectionString, tableNameB, columnOptions: options, autoCreateSqlTable: true) .CreateLogger(); Write(); //C:添加自定义列 options = new ColumnOptions(); options.AdditionalColumns = new Collection { new SqlColumn { DataType = SqlDbType.NVarChar, DataLength =-1, ColumnName = "IP" }, new SqlColumn { DataType = SqlDbType.NVarChar, DataLength =-1, ColumnName = "IP2" } }; Log.Logger = new LoggerConfiguration() .Enrich.WithProperty("IP", "8.8.8.8") .Enrich.WithProperty("IP2", "9.9.9.9") .WriteTo.MSSqlServer(connectionString, tableNameC, columnOptions: options, autoCreateSqlTable: true) .CreateLogger(); Write(); Console.WriteLine("Hello World!"); Console.ReadKey(); } } }

 

 

 ASP.NET Core 中使用 Serilog

参考链接：https://www.cnblogs.com/MaleDeer/p/10797509.html

在Program.cs程序启动时注入Serilog 加载配置

using System;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using Serilog;

namespace WebApplication1
{
    public class Program { public static void Main(string[] args) { Log.Logger = new LoggerConfiguration() .MinimumLevel.Debug() .WriteTo.Console() .WriteTo.File($"{AppContext.BaseDirectory}00_Logs\\log.log", rollingInterval: RollingInterval.Day) .CreateLogger(); try { Log.Information("Starting up"); CreateHostBuilder(args).Build().Run(); } catch (Exception ex) { Log.Fatal(ex, "Application start-up failed"); } finally { Log.CloseAndFlush(); } } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); }) .UseSerilog(); } }

或者

using System;using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using Serilog;

namespace WebApplication1
{
    public class Program { public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); webBuilder.UseSerilog((hostingContext, loggerConfiguration) => { loggerConfiguration .ReadFrom.Configuration(hostingContext.Configuration) .Enrich.FromLogContext() .WriteTo.File($"{AppContext.BaseDirectory}00_Logs\\log.log", rollingInterval: RollingInterval.Day) .WriteTo.Console(); }); }); } }

 

 

使用 Serilog 时，直接使用 ILogger 即可，因为此服务项目应该是默认注入了，此处需要依赖关系注入知识。如你不了解依赖关系注入，请看 微软官方文档。

using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace WebApplication1.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ValuesController : ControllerBase { private readonly ILogger _logger; public ValuesController(ILogger logger) { _logger = logger; } // GET api/values  [HttpGet] public ActionResult> Get() { _logger.LogInformation("test info"); return new string[] { "value1", "value2" }; } } }

 

 

相关链接 

 官网： https://serilog.net/

 github： https://github.com/serilog