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December 24, 2020 15:07
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How to inject custom IConfiguration in Startup.cs CTOR
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using System; | |
using System.IO; | |
using System.Threading.Tasks; | |
using Microsoft.AspNetCore.Hosting; | |
using Microsoft.Extensions.Configuration; | |
using Microsoft.Extensions.Hosting; | |
namespace StartupIConfigurationInjectionProblem | |
{ | |
public class Program | |
{ | |
private static IConfigurationBuilder ConfigurationBuilder; | |
public static async Task Main(string[] args) | |
{ | |
ConfigurationBuilder = new ConfigurationBuilder() | |
.SetBasePath(Directory.GetCurrentDirectory()) | |
.AddJsonFile("appsettings.json", optional : false) | |
.AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT")}.json", optional : true) | |
.AddJsonFile("appsettings.localhost.json", optional : true) | |
.AddEnvironmentVariables(); | |
await CreateHostBuilder(args).Build().RunAsync(); | |
} | |
public static IHostBuilder CreateHostBuilder(string[] args) | |
{ | |
return Host.CreateDefaultBuilder(args) | |
.UseContentRoot(Directory.GetCurrentDirectory()) | |
.ConfigureAppConfiguration(configBuilder => | |
{ | |
Console.WriteLine("ConfigureAppConfiguration called..."); | |
// NOTE: this does not work, we will have to reassign one by one in foreach below | |
//configBuilder = ConfigurationBuilder; | |
// NOTE: clear existing stack built by CreateDefaultBuilder method | |
configBuilder.Sources.Clear(); | |
foreach (var configSource in ConfigurationBuilder.Sources) | |
{ | |
configBuilder.Add(configSource); | |
} | |
}) | |
.ConfigureWebHostDefaults(webBuilder => | |
webBuilder.UseStartup<Startup>()); | |
} | |
} | |
} |
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using System; | |
using Microsoft.AspNetCore.Builder; | |
using Microsoft.AspNetCore.Hosting; | |
using Microsoft.Extensions.Configuration; | |
using Microsoft.Extensions.DependencyInjection; | |
using Microsoft.Extensions.Hosting; | |
using Microsoft.OpenApi.Models; | |
namespace StartupIConfigurationInjectionProblem | |
{ | |
public class Startup | |
{ | |
public Startup(IConfiguration configuration) | |
{ | |
Console.WriteLine(""); | |
var root = (IConfigurationRoot) configuration; | |
Console.WriteLine("Displaying loaded config providers of incjected IConfiguration in Startup.cs CTOR:"); | |
var loadedAppsettingsLocalhostJson = false; | |
foreach (var provider in root.Providers) | |
{ | |
var providerName = provider.ToString(); | |
Console.WriteLine("Provider: {0}", providerName); | |
if (providerName.Contains("appsettings.localhost.json")) | |
{ | |
loadedAppsettingsLocalhostJson = true; | |
} | |
} | |
Console.WriteLine($"\nWas appsettings.localhost.json loaded? {loadedAppsettingsLocalhostJson}\n"); | |
Configuration = configuration; | |
} | |
public IConfiguration Configuration { get; } | |
// This method gets called by the runtime. Use this method to add services to the container. | |
public void ConfigureServices(IServiceCollection services) | |
{ | |
services.AddControllers(); | |
services.AddSwaggerGen(c => | |
{ | |
c.SwaggerDoc("v1", new OpenApiInfo { Title = "StartupIConfigurationInjectionProblem", Version = "v1" }); | |
}); | |
} | |
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline. | |
public void Configure(IApplicationBuilder app, IWebHostEnvironment env) | |
{ | |
if (env.IsDevelopment()) | |
{ | |
app.UseDeveloperExceptionPage(); | |
app.UseSwagger(); | |
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "StartupIConfigurationInjectionProblem v1")); | |
} | |
app.UseHttpsRedirection(); | |
app.UseRouting(); | |
app.UseAuthorization(); | |
app.UseEndpoints(endpoints => | |
{ | |
endpoints.MapControllers(); | |
}); | |
} | |
} | |
} |
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