.LogDashbaord-日志面板

.背景

通常我们会在项目中使用nlog、log4net等日志组件,它们用于记录日志的功能非常强大和完整,常见情况会将日志写到txt或数据库中, 但通过记事本和sql查看日志并不简单方便. LogDashboard提供了一个可以简单快速查看日志的面板。

.日志组件 -nlog

NLog可以轻松地为您的应用程序生成和管理高品质的日志，而不管其大小或复杂性。日志类型可分类信息日志，调试日志，错误日志，异常日志，警告日志。

.安装 Nuget 依赖程序包

.NLog.config配置如下

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">
  <variable name="myvar" value="myvalue"/>

  <targets>
    <target xsi:type="file" name="File" fileName="${basedir}/logs/${shortdate}.log"
            layout="${longdate}||${level}||${logger}||${message}||${exception:format=ToString:innerFormat=ToString:maxInnerExceptionLevel=10:separator=\r\n}||end" />

  </targets>
  <rules>
    <logger name="*" minlevel="Debug" writeTo="file" />
  </rules>
</nlog>

需注意：NLog.config的属性配置为始终复制

.Program.cs配置如下

 public static void Main(string[] args)
        {

            var host = new WebHostBuilder()
                .UseKestrel()
                .UseContentRoot(Directory.GetCurrentDirectory())
                .UseIISIntegration()
                .UseStartup<Startup>()
                .UseUrls("http://*:5000;http://*:5001")
                .UseNLog()
                .Build();

            host.Run();
        }

.Startup.cs配置如下

.运行界面如下

.使用数据库源

1. 打开appsettings.json添加连接字符串配置

"ConnectionStrings": {
    "DefaultConnection": "Server=.;Database=log;User Id=sa;Password=ok;Trusted_Connection=False;"
  }

2. NLog.config的配置更改，先创建数据库和表，以及 SQL的数据插入

<?xml version="1.0" encoding="utf-8" ?>

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true">

  <targets>
    <target name="database" xsi:type="Database">
      <connectionString>${var:ConnectionString}</connectionString>
      <commandText>
        insert into dbo.Log (
        MachineName, LongDate, Level, Message,
        Logger, Callsite, Exception, TraceIdentifier
        ) values (
        @MachineName, @LongDate, @Level, @Message,
        @Logger, @Callsite, @Exception, @TraceIdentifier
        );
      </commandText>

      <parameter name="@MachineName" layout="${machinename}" />
      <parameter name="@LongDate" layout="${longDate}" />
      <parameter name="@Level" layout="${level}" />
      <parameter name="@Message" layout="${message}" />
      <parameter name="@Logger" layout="${logger}" />
      <parameter name="@Callsite" layout="${callsite}" />
      <parameter name="@Exception" layout="${exception:tostring}" />
      <parameter name="@TraceIdentifier" layout="${aspnet-traceidentifier}" />
    </target>
  </targets>

  <rules>
    <logger name="*" minlevel="Info" writeTo="database" />
  </rules>

</nlog>

3. Program.cs代码配置

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



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

5. StartUp.cs代码如下

 public IServiceProvider ConfigureServices(IServiceCollection services)
        {

            var connection = _appConfiguration.GetConnectionString("default");
            NLog.LogManager.Configuration.Variables["connectionString"] = connection;
            services.AddLogDashboard(opt =>
            {
                opt.UseDataBase(() => new SqlConnection(connection));
            });
        } 

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseLogDashboard();
        }

6.大功告成，这时运行项目，在浏览器中导航到 /logdashboard

.参考网址

https://doc.logdashboard.net/