web-app-template/backend/login-counter/app.Configuration/ConfigurationExtensions.cs

using Microsoft.Extensions.Configuration;
using System;

namespace app.Configuration {
    public static class ConfigurationExtensions {
        public static TSetting GetSetting<TSetting>(this IConfiguration config, string sectionName)
            where TSetting : new() {
            var settings = new TSetting();
            config.GetSection(sectionName).Bind(settings);
            return settings;
        }

        public static string GetDbConnectionString(this IConfiguration config, string sectionName) {
            var connectionString = config[$"{sectionName}:ConnectionString"];

            if (string.IsNullOrEmpty(connectionString))
                throw new Exception($"ConnectionString is not set! SectionName:{sectionName}");

            var dbCredentials = config[$"{sectionName}:Credentials"];

            if (!string.IsNullOrEmpty(dbCredentials))
                connectionString += dbCredentials;

            return connectionString;
        }

        public static string GetCustomer(this IConfiguration config) {
            return config["CUSTOMER"];
        }

        public static string GetComputerName(this IConfiguration config) {
            return config["COMPUTERNAME"];
        }

    }
}