.net core 3.1 Microsoft.Extensions.Logging.Log4Net.AspNetCore not logging to a file

Question

User956626884 posted

I am trying to add log to file functionality in my webapi 3.1 with Microsoft.Extensions.Logging.Log4Net.AspNetCore.

I am able to log to eventviewer and see the log information but I see no file created.

I followed the steps in the follings:

https://github.com/huorswords/Microsoft.Extensions.Logging.Log4Net.AspNetCore https://github.com/huorswords/Microsoft.Extensions.Logging.Log4Net.AspNetCore/blob/develop/doc/CONFIG.md Simplest correct way to configure log4net for a .Net Core 3.1 application

According to GitHub, all I have to do is install the package, AddLog4Net in the startup.cs.

I am not sure why no logfile is generated.

But I had no success yet

Any help is greatly appreciated. Thanks

UPDATE: I went the github url: https://github.com/huorswords/Microsoft.Extensions.Logging.Log4Net.AspNetCore

and downloaded the sample code. When I removed the <configuration> tag, it worked. 

Answer 1

User-939850651 posted

Hi comicrage,

According to the code you provided, I have some confusion.

Did you modify part of the code? There are many problems with the code you have given, such as:

1. UserStartup<Startup>() 
UseStartup<Startup>()
2. public static void SetupConfiguration(WebHostBuilderContext ctx, IConfiguration builder)
IConfigurationBuilder interface.
3. AddEnvironmentalVariables() 
AddEnvironmentVariables()
4. public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory) 
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory) 
5. <staticLogFileName value="false"> 
<staticLogFileName value="false"/>

I'm not sure if this is all the existing problems, I modified them and ran the code. And found that the log file has been generated, it is located in the bin\Debug folder under the project path. Just like this:

If there is no exception during the code execution, you can check under the Bin file. I think this is because of the path configuration.

Hope this can help you.

Best regards,

Xudong Peng

Answer 2

User956626884 posted

Thanks for the help