OptionsPatternSamples - Validate 2

gistfile1.txt

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using OptionsPatternSamples.Options;
using System;

namespace OptionsPatternSamples
{
public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
            services.AddOptions<AzureAdOptions>()
                // options + IConfiguration のパターン 
                .Configure<IConfiguration>((options, configuration) => configuration.GetSection(nameof(AzureAdOptions)).Bind(options))
                .Validate(options =>
                {
                    // 地道に validation:
                    if (string.IsNullOrEmpty(options.TenantId)) throw new ArgumentNullException(nameof(options.TenantId));
                    if (string.IsNullOrEmpty(options.ClientId)) throw new ArgumentNullException(nameof(options.ClientId));
                    if (string.IsNullOrEmpty(options.ClientSecret)) throw new ArgumentNullException(nameof(options.ClientSecret));

                    return true;
                });