Serilog ReadFrom配置

Question

我正在尝试使用appsettings.json预发布Serilog.Settings.Configuration包从NuGet加载我的Serilog配置。但是，当我使用Configuration.GetSection加载它时，该值将继续返回为null。

下面是我的Program.cs文件中的内容：

    return WebHost.CreateDefaultBuilder(args)
    .UseStartup<Startup>()
    .ConfigureLogging(
        (hostingContext, loggingBuilder) =>
        {
            loggingBuilder.ClearProviders();
            loggingBuilder.AddSerilog(
                new LoggerConfiguration()
                    .ReadFrom.ConfigurationSection(hostingContext.Configuration.GetSection("Serilog"))
                    .CreateLogger()
            );
        }
    );

下面是我的appsettings.json文件中的内容：

    {
    "Serilog": {
        "Using": [ "Serilog.Sinks.MSSqlServer" ],
        "MinimumLevel": {
            "Default": "Verbose",
            "Override": {
                "Microsoft": "Verbose",
                "System": "Verbose",
                "Microsoft.AspNetCore.Authentication": "Verbose"
            }
        },
        "WriteTo": [
            {
                "Name": "MSSqlServer",
                "Args": {
                    "connectionString": "*my_connectionString*",
                    "tableName": "ErrorLog"
                }
            }
        ]
    }}

安装的NuGet包：

• Microsoft.AspNetCore.App v2.1.1
• Serilog v2.7.1
• Serilog.AspNetCore v2.1.1
• Serilog.Extensions.Logging v2.0.2
• Serilog.Settings.Configuration v3.0.0-dev-00119
• Serilog.Sinks.MSSqlServer v5.1.2

Answer 1

我这样配置它：

return WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
                .ReadFrom.Configuration(hostingContext.Configuration))
            .Build();

默认情况下，Serilog在配置中查找Serilog部分

Answer 2

我是这样配置的

public static void Main(string[] args)
{
    var _config = new ConfigurationBuilder()
                .AddJsonFile("loggerconfig.json") //mantained separate config file
                .Build();

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

    CreateWebHostBuilder(args).Build().Run();
}

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseSerilog()
        .UseStartup<Startup>();

根据塞里罗格的说法，这是更好的方法。

Answer 3

下面是我如何从logging.json中读到的：

            var builder = new ConfigurationBuilder()
                .AddJsonFile(path: "logging.json", optional: false, reloadOnChange: true);

            var config = builder.Build();
            Log.Logger = new LoggerConfiguration()
                        .Enrich.With(new EventBusLogEnricher())
                        .ReadFrom.Configuration(config)
                        .CreateLogger();