How to get absolute path of running App using IHostBuilder

Question

I have created a class library for custom logger and register my logger to windows or web application using extension method on IHostBuilder. I want to create "Log" folder (if not exists) in directory were Program.cs file exists. With console application I can create directory using relative path Directory.CreateDirectory(@"......\Logs") and it creates directory in desired location. However when my logger is registered with WebApp it creates directory in "F:\Logs\CsvILogger.csv".

public static IHostBuilder RegisterMyLoggerWithDefaultSettings(this IHostBuilder builder)
{
   //How can I get absolute path of program.cs file here with web application?

}

How can I get path to folder where "program.cs" file exists when my logger is registered to WebApplication?

Hemendr · Accepted Answer · 2022-05-29 01:45:13Z

I got the idea to find the solution from this post: remove specific logging provider from the services

Note: For getting Webroot path I used reflection to extract property value because I don't want to add reference to Asp.Net core library in my class library where this extesion methord resides. I have only added package reference of Microsoft.Extensions.Hosting in my class library.

public static IHostBuilder FindApplicationPath(this IHostBuilder builder)
    {
        builder.ConfigureLogging((context, loggingBuilder) =>
            {
                var serviceDescriptor = loggingBuilder.Services.Where(x => x.ImplementationInstance != null && x.ServiceType.FullName == "Microsoft.AspNetCore.Hosting.IWebHostEnvironment").FirstOrDefault();
                string appPath;
                if (serviceDescriptor != null)
                {
                    //application is web application
                    appPath = serviceDescriptor.ImplementationInstance
                                     .GetType()
                                     .GetProperty("WebRootPath")
                                     .GetValue(serviceDescriptor.ImplementationInstance, null)
                                     .ToString();
                    //code to use path
                }
                else
                {
                    serviceDescriptor = loggingBuilder.Services
                                        .Where(x => x.ImplementationInstance != null && 
                                                                   x.ServiceType == typeof(Microsoft.Extensions.Hosting.IHostEnvironment))
                                        .FirstOrDefault();
                    var hostingEnvironment = (Microsoft.Extensions.Hosting.Internal.HostingEnvironment)serviceDescriptor.ImplementationInstance;
                    appPath = hostingEnvironment.ContentRootPath;
                     
                      //code to use path
                }

            }
        );
        return builder;
    }

Output:

Web-App:

Z:\Folder1\Folder2\MyWebApp\wwwroot

Console-App:

Z:\MyConsoleApp\bin\Debug\net6.0

Collectives™ on Stack Overflow

How to get absolute path of running App using IHostBuilder

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related