■ OptionsBuilder<T> 클래스의 Validate 메소드를 사용해 옵션 값을 검증하는 방법을 보여준다.
▶ appsettings.json
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{ "Test" : { "Key1" : "Key One", "Key2" : 40, "Key3" : 30 }, "Logging" : { "LogLevel" : { "Default" : "Information", "Microsoft" : "Warning", "Microsoft.Hosting.Lifetime" : "Information" } }, "AllowedHosts" : "*" } |
▶ Models/TestOption.cs
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using System.ComponentModel.DataAnnotations; namespace TestProject.Models { /// <summary> /// 스타일 옵션 /// </summary> public class TestOption { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 키 1 - Key1 /// <summary> /// 키 1 /// </summary> [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")] public string Key1 { get; set; } #endregion #region 키 2 - Key2 /// <summary> /// 키 2 /// </summary> [Range(0, 1000, ErrorMessage = "Value for {0} must be between {1} and {2}.")] public int Key2 { get; set; } #endregion #region 키 3 - Key3 /// <summary> /// 키 3 /// </summary> public int Key3 { get; set; } #endregion } } |
▶ Startup.cs
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using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; using TestProject.Models; namespace TestProject { /// <summary> /// 시작 /// </summary> public class Startup { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 구성 - Configuration /// <summary> /// 구성 /// </summary> public IConfiguration Configuration { get; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - Startup(configuration) /// <summary> /// 생성자 /// </summary> /// <param name="configuration">구성</param> public Startup(IConfiguration configuration) { Configuration = configuration; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 서비스 컬렉션 구성하기 - ConfigureServices(services) /// <summary> /// 서비스 컬렉션 구성하기 /// </summary> /// <param name="services">서비스 컬렉션</param> public void ConfigureServices(IServiceCollection services) { services.AddOptions<TestOption>() .Bind(Configuration.GetSection("Test")) .ValidateDataAnnotations() .Validate ( testOption => { if(testOption.Key2 != 0) { return testOption.Key3 > testOption.Key2; } return true; }, "Key3 must be > than Key2." ); services.AddControllersWithViews(); } #endregion #region 구성하기 - Configure(app, environment) /// <summary> /// 구성하기 /// </summary> /// <param name="app">애플리케이션 빌더</param> /// <param name="environment">웹 호스트 환경</param> public void Configure(IApplicationBuilder app, IWebHostEnvironment environment) { if(environment.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Home/Error"); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); app.UseAuthorization(); app.UseEndpoints ( endpoints => { endpoints.MapControllerRoute ( name : "default", pattern : "{controller=Home}/{action=Index}/{id?}" ); } ); } #endregion } } |
▶ Controllers/TestController.cs
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using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Logging; using Microsoft.Extensions.Options; using System.Text; using TestProject.Models; namespace TestProject.Controllers { /// <summary> /// 테스트 컨트롤러 /// </summary> public class TestController : Controller { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 로그 기록기 /// </summary> private readonly ILogger<TestController> logger; /// <summary> /// 옵션 /// </summary> private readonly IOptions<TestOption> options; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - TestController(logger, options) /// <summary> /// 생성자 /// </summary> /// <param name="logger">로그 기록기</param> /// <param name="options">옵션</param> public TestController(ILogger<TestController> logger, IOptions<TestOption> options) { this.logger = logger; this.options = options; try { TestOption testOption = this.options.Value; } catch(OptionsValidationException exception) { foreach(string failure in exception.Failures) { this.logger.LogError(failure); } } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 인덱스 페이지 처리하기 - Index() /// <summary> /// 인덱스 페이지 처리하기 /// </summary> /// <returns>액션 결과</returns> public IActionResult Index() { StringBuilder stringBuilder = new StringBuilder(); try { stringBuilder.AppendLine($"Key1 : { this.options.Value.Key1}"); stringBuilder.AppendLine($"Key2 : { this.options.Value.Key2}"); stringBuilder.AppendLine($"Key3 : { this.options.Value.Key3}"); } catch(OptionsValidationException exception) { return Content(exception.Message); } return Content(stringBuilder.ToString()); } #endregion } } |
