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ジャンルのカテゴリ―名

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<p data-bm="57" style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert; color: rgba(0, 0, 0, 0.8); font-family: roboto, helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;" data-pasted="true">今回は&nbsp;ASP.NET Core MVC の Controller 内で実際に使える形 にし、 <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">Payment</code> の生成処理をサービスメソッドに分離して再利用可能にします。<pre data-priority="2" data-bm="58" style="background: none 0% 0% / auto repeat scroll padding-box border-box rgb(249, 249, 249); border: 1px solid rgba(0, 0, 0, 0.1); border-radius: 8px; overflow: hidden; color: rgba(0, 0, 0, 0.8); font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><div data-bm="62" style="display: flex; height: 28px; flex-direction: row; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 12px; border-bottom: 1px solid rgba(0, 0, 0, 0.1); background: none 0% 0% / auto repeat scroll padding-box border-box rgb(243, 249, 254);"><h5 style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 0px; padding: revert; font-style: normal !important; font-variant: normal !important; font-weight: 400 !important; font-stretch: 100% !important; line-height: 18px; font-family: roboto, helvetica, sans-serif !important; font-optical-sizing: auto !important; font-size-adjust: none !important; font-kerning: auto !important; font-feature-settings: normal !important; font-variation-settings: normal !important; font-language-override: normal !important; font-size: 16px; display: inline-block; color: rgb(11, 73, 127);">Csharp</h5><div style="height: 28px;"><button type="button" tabindex="" title="Copy code" style="box-sizing: border-box; margin: 0px; padding: 0px; font: 400 13px / 20px roboto, helvetica, sans-serif; background-color: rgb(225, 240, 253); border: 1px solid rgba(0, 0, 0, 0); display: grid; color: rgb(0, 0, 0) !important; grid-auto-flow: column; align-items: center; cursor: pointer; text-decoration: none !important; border-radius: 9999px; block-size: 28px; gap: 2px; padding-inline: 10px;"><div style="box-sizing: border-box; margin: 0px; padding: 0px; min-inline-size: 0px; max-inline-size: 100%; white-space: nowrap; text-overflow: ellipsis; overflow: clip; max-block-size: calc(1lh); padding-inline: 2px;">Copy code</div></button></div></div><code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255); display: block; white-space: pre-wrap; overflow-wrap: anywhere; padding: 8px 16px 16px;">using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc;

public class Payment
{
 public int PaymentId { get; set; } // DB側で自動生成
 public DateTime Posted { get; set; }
 public bool InOut { get; set; }
 public int? SubjectNameId { get; set; }
 public string ItemName { get; set; }
 public string PaymentName { get; set; }
 public int? PaymentTypeId { get; set; }
 public int? PaymentMethodId { get; set; }
 public int? IncomeCategoryId { get; set; }
 public int? IncomeTypeId { get; set; }
 public decimal Amount { get; set; }
}

public interface IPaymentService
{
 List&lt;Payment&gt; GeneratePayments();
}

public class PaymentService : IPaymentService
{
 private static int? GetId(Dictionary&lt;string, int&gt; dict, string key)
 {
 return dict.TryGetValue(key, out var value) &amp;&amp; value != 0 ? value : (int?)null;
 }

 public List&lt;Payment&gt; GeneratePayments()
 {
 int thisYear = DateTime.Now.Year;
 int previousMonth = DateTime.Now.Month - 1;
 if (previousMonth == 0) { previousMonth = 12; thisYear--; }

 // 各Id辞書
 var subjectNameDict = new Dictionary&lt;string, int&gt; { { &quot;家計&quot;, 1 }, { &quot;事業&quot;, 2 } };
 var paymentTypeDict = new Dictionary&lt;string, int&gt; { { &quot;予算&quot;, 10 }, { &quot;支出&quot;, 20 } };
 var paymentMethodDict = new Dictionary&lt;string, int&gt; { { &quot;現金&quot;, 100 }, { &quot;銀行振込&quot;, 200 } };
 var incomeCategoryDict = new Dictionary&lt;string, int&gt; { { &quot;給与&quot;, 300 }, { &quot;副業&quot;, 400 } };
 var incomeTypeDict = new Dictionary&lt;string, int&gt; { { &quot;定期&quot;, 500 }, { &quot;臨時&quot;, 600 } };

 // 複数のPaymentデータ定義
 var paymentData = new[]
 {
 new { SubjectKey = &quot;家計&quot;, TypeKey = &quot;予算&quot;, MethodKey = &quot;現金&quot;, CategoryKey = &quot;給与&quot;, IncomeTypeKey = &quot;定期&quot;, Amount = 268000m, ItemName = &quot;今月予算&quot; },
 new { SubjectKey = &quot;事業&quot;, TypeKey = &quot;支出&quot;, MethodKey = &quot;銀行振込&quot;, CategoryKey = &quot;副業&quot;, IncomeTypeKey = &quot;臨時&quot;, Amount = 150000m, ItemName = &quot;事業支出&quot; }
 };

 var payments = new List&lt;Payment&gt;();

 foreach (var data in paymentData)
 {
 payments.Add(new Payment
 {
 Posted = new DateTime(thisYear, previousMonth, 1),
 InOut = true,
 SubjectNameId = GetId(subjectNameDict, data.SubjectKey),
 ItemName = data.ItemName,
 PaymentName = null,
 PaymentTypeId = GetId(paymentTypeDict, data.TypeKey),
 PaymentMethodId = GetId(paymentMethodDict, data.MethodKey),
 IncomeCategoryId = GetId(incomeCategoryDict, data.CategoryKey),
 IncomeTypeId = GetId(incomeTypeDict, data.IncomeTypeKey),
 Amount = data.Amount
 });
 }

 return payments;
 }
}

public class PaymentsController : Controller
{
 private readonly IPaymentService _paymentService;

 public PaymentsController(IPaymentService paymentService)
 {
 _paymentService = paymentService;
 }

 public IActionResult Index()
 {
 // サービスからPaymentリストを取得
 var payments = _paymentService.GeneratePayments();

 // Viewに渡す
 return View(payments);
 }
}
</code></pre><h3 data-bm="59" style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: revert; padding: revert; display: inline-block; font: 400 20px / 22px roboto, helvetica, sans-serif; color: rgba(0, 0, 0, 0.8); letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">改良点</h3><ol data-bm="60" style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: revert; padding: revert; color: rgba(0, 0, 0, 0.8); font-family: roboto, helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><li style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin-top: revert; margin-right: revert; margin-bottom: 8px; margin-left: revert; padding: revert;"><p style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert;">MVC構造対応 <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">PaymentService</code> に生成処理を分離し、<code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">PaymentsController</code> から呼び出す形に変更。</li><li style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin-top: revert; margin-right: revert; margin-bottom: 8px; margin-left: revert; padding: revert;"><p style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert;">依存性注入（DI）対応 <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">IPaymentService</code> インターフェースを用意し、ASP.NET Core の DI コンテナに登録すればテストや拡張が容易。</li><li style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin-top: revert; margin-right: revert; margin-bottom: 8px; margin-left: revert; padding: revert;"><p style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert;">再利用性向上 <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">GeneratePayments()</code> メソッドは他のコントローラーやバッチ処理でも利用可能。</li><li style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin-top: revert; margin-right: revert; margin-bottom: 8px; margin-left: revert; padding: revert;"><p style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert;">View連携 コントローラーの <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">Index</code> アクションで生成した <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">payments</code> をビューに渡す。</li></ol><p data-bm="61" style="border: 0px; border-collapse: collapse; border-spacing: 0px; list-style-position: initial; list-style-image: initial; list-style-type: revert; margin: 4px; padding: revert; -webkit-line-clamp: revert; color: rgba(0, 0, 0, 0.8); font-family: roboto, helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">この形なら、実際の ASP.NET Core MVC プロジェクトに組み込んで動かせます。 次はこの <code style="border-radius: 8px; background: none 0% 0% / auto repeat scroll padding-box border-box rgb(255, 255, 255);">PaymentService</code> を&nbsp;DBから辞書データを取得する形 に変えることもできますが、それも作りますか？ そうすれば完全に動的な ID 取得になります。Powered by <a href="https://www.froala.com/wysiwyg-editor?pb=1" title="Froala Editor">Froala Editor</a>

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