不支持.Net core 2.0中的log4net AdoNetAppender？

Question

I'm implementing log4net AdoNetAppender in asp.net core 2.0 , but I guess it is not supporting. I have implemented log4net RollingFileAppender in core 2.0 & it worked successfully using log4.net config. So, if log4net AdoNetAppender is not supporting in core 2.0, is there any other way to insert logs to sql database in core 2.0?

Thank you

Answer 1

I faced the same issue and solved using this nuget package in .net core solution

https://www.nuget.org/packages/MicroKnights.Log4NetAdoNetAppender

You can find more information about how to set this up on

https://github.com/microknights/Log4NetAdoNetAppender

Other option could be referring to the implementation in https://svn.apache.org/repos/asf/logging/log4net/tags/log4net-1_2_9/src/Appender/AdoNetAppender.cs

Answer 2

I had the same problem. I've fixed it in the following way:

Add log4net.config.xml file to the ASP.NET Core project with appenders. In this file for AdoNetAppender you can specify connectionString or connectionStringName but it doesn't make sense because the connection will be null .

So, add connection string to appsettings.json instead

"ConnectionStrings": {
   "Log": "Data Source=localhost\\SQLEXPRESS;Initial Catalog=Log.Database;User ID=sa;Password=;MultipleActiveResultSets=True"
}

Then configure

ILoggerRepository logRepository = log4net.LogManager.GetRepository(Assembly.GetExecutingAssembly());
XmlConfigurator.Configure(logRepository, new FileInfo("log4net.config"));\

and assign connection string manually

ILog _databaseLogger = log4net.LogManager.GetLogger("DBLogger");
var repository = _databaseLogger?.Logger.Repository;
if (repository != null) 
{
    _adoAppender = repository.GetAppenders()
        .FirstOrDefault(a => a is AdoNetAppender) as AdoNetAppender;

    if (_adoAppender != null && string.IsNullOrEmpty(_adoAppender.ConnectionStringName)) 
    {
        _adoAppender.ConnectionString = "some connection string from appsettings.json";
        _adoAppender.ActivateOptions();
    }
}

The ActivateOptions() calls for reinitialize the appender.