Ndtyjky

I am using serilog and Seq in my Asp.net core program but I keep getting the above error. My Seq server is running though. Find below the configuration in the appsetting.json and startup.cs respectively.

Appsetting.json

"Serilog": {

    "Destructure": [

      {

        "Name": "With",

        "Args": { "policy": "Sample.CustomPolicy, Sample" }

      },

      {

        "Name": "ToMaximumDepth",

        "Args": { "maximumDestructuringDepth": 4 }

      },

      {

        "Name": "ToMaximumStringLength",

        "Args": { "maximumStringLength": 100 }

      },

      {

        "Name": "ToMaximumCollectionCount",

        "Args": { "maximumCollectionCount": 10 }

      }

    ],

    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],

    "MinimumLevel": "Debug",

    "Properties": {

      "Application": "Sample"

    },

    "Using": [ "Serilog.Sinks.File", "Serilog.Sinks.Async", "Serilog.Sinks.Console", "Serilog.Sinks.Seq", "Serilog.Sinks.Graylog" ],

    "WriteTo": [

      {

        "Name": "Console"



      },

      {

        "Name": "File",

        "Args": { "path": "Loggers/logs.txt" }

      },

      {

        "Args": {

          "serverUrl": "http://localhost:5341"



        },

        "Name": "Seq"

      }

    ]

  }

StartUp.cs

 services.AddLogging(loggingBuilder =>

 {

     loggingBuilder.AddSeq("Seq");

 });

For loggingBuilder.AddSeq("Seq");, you need to pass url instead of Seq.

    //

// Summary:

//     Extends Microsoft.Extensions.Logging.ILoggerFactory with methods for configuring

//     Seq logging.

public static class SeqLoggerExtensions

{

    //

    // Summary:

    //     Adds a Seq logger configured from the supplied configuration section.

    //

    // Parameters:

    //   loggerFactory:

    //     The logger factory.

    //

    //   configuration:

    //     A configuration section with details of the Seq server connection.

    //

    // Returns:

    //     A logger factory to allow further configuration.

    public static ILoggerFactory AddSeq(this ILoggerFactory loggerFactory, IConfigurationSection configuration);

    //

    // Summary:

    //     Adds a Seq logger.

    //

    // Parameters:

    //   loggerFactory:

    //     The logger factory.

    //

    //   serverUrl:

    //     The Seq server URL; the default is http://localhost:5341.

    //

    //   apiKey:

    //     A Seq API key to authenticate or tag messages from the logger.

    //

    //   minimumLevel:

    //     The level below which events will be suppressed (the default is Microsoft.Extensions.Logging.LogLevel.Information).

    //

    //   levelOverrides:

    //     A dictionary mapping logger name prefixes to minimum logging levels.

    //

    // Returns:

    //     A logger factory to allow further configuration.

    public static ILoggerFactory AddSeq(this ILoggerFactory loggerFactory, string serverUrl = "http://localhost:5341", string apiKey = null, LogLevel minimumLevel = LogLevel.Information, IDictionary<string, LogLevel> levelOverrides = null);

    //

    // Summary:

    //     Adds a Seq logger.

    //

    // Parameters:

    //   loggingBuilder:

    //     The logging builder.

    //

    //   serverUrl:

    //     The Seq server URL; the default is http://localhost:5341.

    //

    //   apiKey:

    //     A Seq API key to authenticate or tag messages from the logger.

    //

    // Returns:

    //     A logging builder to allow further configuration.

    public static ILoggingBuilder AddSeq(this ILoggingBuilder loggingBuilder, string serverUrl = "http://localhost:5341", string apiKey = null);

    //

    // Summary:

    //     Adds a Seq logger configured from the supplied configuration section.

    //

    // Parameters:

    //   loggingBuilder:

    //     The logging builder.

    //

    //   configuration:

    //     A configuration section with details of the Seq server connection.

    //

    // Returns:

    //     A logging builder to allow further configuration.

    public static ILoggingBuilder AddSeq(this ILoggingBuilder loggingBuilder, IConfigurationSection configuration);

}

If you want to passing the configuration from appsettings.json, define the appsettings.json like

    "Seq": {

  "ServerUrl": "http://localhost:5341",

  "ApiKey": "1234567890",

  "MinimumLevel": "Trace",

  "LevelOverride": {

    "Microsoft": "Warning"

  }

}

And using like loggingBuilder.AddSeq(Configuration.GetSection("Seq"));.

If you need to combine serilog and Seq, refer Using Serilog.

Log.Logger = new LoggerConfiguration()

        .WriteTo.Console()

        .WriteTo.Seq("http://localhost:5341")

        .CreateLogger();