ASP.NET Core 登录 2 个不同的文件

Question

将默认的 ASP.NET 核心日志记录与 Serilog 结合使用时，是否可以将错误写入 errors.log 并将信息写入 information.log

using Microsoft.Extensions.Logging;
using Serilog;

loggerFactory.AddSerilog();
loggerFactory.AddFile(Configuration.GetSection("Logging"));

Appsettings.json：

"Logging": {
    "PathFormat": "path-{Date}.log",
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Information",
      "System": "Information",
      "Microsoft": "Information"
    }
  }

我想要一个日志文件，我可以在其中查看已完成的请求以及诸如此类的内容，只是信息日志。和一个用于调试目的的错误日志。如何将不同的内容记录到 2 个文件中？

Answer 1

如果要使用单个 Logger 对象，可以按级别过滤日志类型：

using Serilog;
using Serilog.Events;

Log.Logger = new LoggerConfiguration()
            // Restricts logs to: Debug, Information, Warning, Error and Fatal
            .MinimumLevel.Debug()
            // Logs Information, Warning, Error and Fatal to "info-logs.txt" file
            .WriteTo.File(path: "info-logs.txt", restrictedToMinimumLevel: LogEventLevel.Information)
            // Logs Error and Fatal to "error-logs.txt" file
            .WriteTo.File(path: "error-logs.txt", restrictedToMinimumLevel: LogEventLevel.Error) 
            .CreateLogger();

Log.Verbose("Loggin Verbose..."); // Won't log, because the Logger "MinimumLevel" is set to Debug
Log.Debug("Loggin Debug..."); // Won't log, because there is no sink that takes Debug
Log.Information("Loggin Information..."); // Logs into "info-logs.txt"
Log.Warning("Loggin Warning..."); // Logs into "info-logs.txt"
Log.Error("Loggin Error..."); // Logs into "info-logs.txt" and "error-logs.txt"
Log.Fatal("Loggin fatal..."); // Logs into "info-logs.txt" and "error-logs.txt"

文档中的日志级别和描述：