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Using IConfiguration in Class library Saturday, 16 June 2018

By using IConfiguration, you can access appsetting.json content in asp.net core. Using it in Startup is straightforward: 

public class Startup

    {

        public Startup(IConfiguration configuration)

        {

            Configuration = configuration;

        }



        public IConfiguration Configuration { get; }



        public void ConfigureServices(IServiceCollection services)

        {

        }



        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

        {

//using Configuration

 app.ConfigureExceptionHandler(Configuration["Logs:Url"], Configuration["Logs:ExceptionIndex"]);

        }

    }


And in Controller level is similar by taking credit of HttpContext:

 

public class Controller : controllerBase

{          

        protected IActionResult Sample()

        {

            var services = HttpContext.RequestServices;

            var configuration = (IConfiguration)services.GetService(typeof(IConfiguration));

            var url = configuration["FtpInformation:FtpRead"];

            return ok();

        }

}


 

But if you want to use it in a class rather than Asp.net level. In a class library you can use the following code snippet: 

 

 public class CacheService : ICacheService

    {

        private static IConfiguration configuration;



        private static string Address { get { return configuration["CacheServer:Url"]; } }



        public CacheService()

        {

            var builder = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

            configuration = builder.Build();

        }



        public async Task<object> GetAsync(object key)

        {

         //use address in the method

        }

} 


 

Cheers!

 

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