OptionsPatternSamples - Validate 1

startup.cs

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>()
            .Configure(options => Configuration.GetSection(nameof(AzureAdOptions)).Bind(options))
            // このメソッドが用意されてるので簡単に validate できる
            .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;
            });

// 以下略