Log4Net is a very powerful logging application for ASP.NET applications. Logs can be written to a text file or also to a database. The one major downfall of Log4Net is that it does not have a built in interface to view the logs. I have created a new project on GitHub to house a MVC based UI for Log4Net logs that are written to a database.
This UI includes Ajax calls to view and delete logs, DataTables.net incorporate sorting and filtering of logs, as well as color coding the logs based on their level.
You can view and down load the project out on GitHub: https://github.com/jpresley/ASPNET-MVC-Log4Net-UI