How does Serilog retrieve key information?

I need a requirement like this, I need to create a log message record of any kind using the logging framework. Then record some logs in some key places, and then I need to retrieve some information from it, how is this done?

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Like this, or is there any other framework that is easier to implement? Any help is greatly appreciated.

Solution

Required Nuget Packages:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Serilog.AspNetCore" Version="4.1.0" />
    <PackageReference Include="Serilog.Settings.Configuration" Version="3.3.0" />
    <PackageReference Include="Serilog.Sinks.Console" Version="4.0.1" />
    <PackageReference Include="Serilog.Sinks.File" Version="5.0.0" />
  </ItemGroup>

  <ItemGroup>
    <Folder Include="MyLogInfo\" />
  </ItemGroup>

</Project>

appsettings.json configuration：

{

  "Serilog": {
    "MinimumLevel": "Information",
    "Override": {
      "Microsoft.AspNetCore": "Warning"
    },
    "WriteTo": [
      {
        "Name": "Console "
      },
      {
        "Name": "File",
        "Args": {
          "path": "MyLogInfo\\MyLogInfo.txt",
          "formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog"
        }
      }
    ]
  }
}

Then add code in startup.cs to read these Serilog settings in the constructor：

 public Startup(IConfiguration configuration)
        {
            Configuration = configuration;

            Log.Logger = new LoggerConfiguration()
       .ReadFrom.Configuration(configuration)
       .CreateLogger();
        }

Finally change the code in program.cs to specify that Host Builder uses Serilog from ASP.NET Core instead of the default logger：

 public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .UseSerilog()
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }

Result:

For more details, please refer to this article:

Implementing logging with Serilog