C# Serilog：记录到不同的文件

我将所有类型的事件记录到单个Json文件中，而不考虑日志级别。现在我需要将一些自定义性能计数器记录到一个单独的Json文件中。如何在Serilog中实现这一点。我是否应该创建不同的记录器实例，并在记录性能计数器时使用该实例？要将其与LibLog一起使用，可以首先确保使用特定属性值（LibLog中的

OpenMappedContext（）

）或特定类型/命名空间标记性能计数器事件

var log = LogProvider.For<MyApp.Performance.SomeCounter>()
log.Info(...);

---

如果您想拥有一个独立的日志管道，只需创建另一个实例。 本书改编自：

---

我们也可以在配置文件中设置它。下面给出了

appsettings.json

中的一个示例，用于根据级别拆分日志和滚动文件

{
 
  "Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Error' or @Level = 'Fatal' or @Level = 'Warning')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/ex_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      },
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Information' or @Level = 'Debug')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/cp_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      }
    ],
    "Enrich": [
      "FromLogContext",
      "WithMachineName"
    ],
    "Properties": {
      "Application": "MultipleLogFilesSample"
    }
  }
}

然后，只需修改

Program.cs

文件中的

CreateHostBuilder

方法即可从配置文件中读取

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

公共静态IHostBuilder CreateHostBuilder（字符串[]args）=>
Host.CreateDefaultBuilder（args）
.ConfigureWebHostDefaults（webBuilder=>
{
webBuilder.UseStartup（）；
})
.useserlog（（hostingContext，loggerConfig）=>
loggerConfig.ReadFrom.Configuration（hostingContext.Configuration）
);

---

有关更多详细信息，请参阅帖子

阅读您的文章：Serilog 2.0与子记录器的冒险。不确定我是否遗漏了什么，但是，如果我这样做，来自“”MyApp.Performance的日志“我也会去外面的记录器，对吗？我不想将这些特定日志写入主日志文件。添加两个子日志管道和反向过滤器应该可以做到这一点。更新答案……这对我来说很有效。已编辑答案以删除JsonFormatter。您有此json示例吗？可能有重复的

{
 
  "Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Error' or @Level = 'Fatal' or @Level = 'Warning')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/ex_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      },
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncludingOnly",
                "Args": {
                  "expression": "(@Level = 'Information' or @Level = 'Debug')"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "Logs/cp_.log",
                  "outputTemplate": "{Timestamp:o} [{Level:u3}] ({SourceContext}) {Message}{NewLine}{Exception}",
                  "rollingInterval": "Day",
                  "retainedFileCountLimit": 7
                }
              }
            ]
          }
        }
      }
    ],
    "Enrich": [
      "FromLogContext",
      "WithMachineName"
    ],
    "Properties": {
      "Application": "MultipleLogFilesSample"
    }
  }
}

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