.net\u306eDI(Dependency Injection)\u306f\u6307\u5b9a\u65b9\u6cd5\u306b\u3088\u3063\u3066\u3001\u305d\u306e\u6709\u52b9\u671f\u9593\u304c\u7570\u306a\u308b\u3002<\/p>\n\n\n\n
Blazor\u3092\u4f7f\u3063\u3066\u3001\u305d\u306e\u6709\u52b9\u671f\u9593\u3092\u898b\u3066\u3044\u3053\u3046\u3002<\/p>\n\n\n\n
\u307e\u305a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30af\u30e9\u30b9\u3092\u7528\u610f\u3059\u308b\u3002<\/p>\n\n\n\n
public class SingletonClass {\n public int Count { get; set; }\n public EventHandler? SingletonEvent { get; set; }\n public void BubbleSingletonEvent(object? sender, EventArgs e) {\n if (SingletonEvent != null) {\n SingletonEvent.Invoke(sender,e);\n }\n }\n}\npublic class ScopedClass {\n public int Count { get; set;}\n}\npublic class TransientClass {\n public int Count { get; set;}\n}<\/code><\/pre><\/div>\n\n\n\n\u3053\u308c\u3089\u306e\u30af\u30e9\u30b9\u3092\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066\u767b\u9332<\/p>\n\n\n\n
\u30fb\u30fb\u30fb\nvar builder = WebApplication.CreateBuilder(args);\n\n\/\/ Add services to the container.\nbuilder.Services.AddRazorComponents()\n .AddInteractiveServerComponents();\n\/\/ Singleton\nbuilder.Services.AddSingleton<SingletonClass>();\n\/\/ Scoped\nbuilder.Services.AddScoped<ScopedClass>();\n\/\/ Transient\nbuilder.Services.AddTransient<TransientClass>();\n\u30fb\u30fb\u30fb<\/code><\/pre><\/div>\n\n\n\nBlazor\u30b5\u30f3\u30d7\u30eb\u306eCounter\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3001\u3053\u308c\u3089\u3092Inject<\/p>\n\n\n\n
@page "\/counter"\n@rendermode InteractiveServer\n@inject SingletonClass sic\n@inject ScopedClass scp\n@inject TransientClass trn\n\n<PageTitle>Counter<\/PageTitle>\n\n<h1>Counter<\/h1>\n\n<p role="status">Current count: @currentCount<\/p>\n<p role="status">Singleton: @sic.Count<\/p>\n<p role="status">Scoped: @scp.Count<\/p>\n<p role="status">Transient: @trn.Count<\/p>\n\n<button class="btn btn-primary" @onclick="IncrementCount">Click me<\/button>\n\n@code {\n private int currentCount = 0;\n\n protected override void OnInitialized() {\n \/\/ Singleton\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3092\u8a2d\u5b9a\n sic.SingletonEvent += async (sender,e) => await InvokeAsync(StateHasChanged);\n }\n\n private void IncrementCount()\n {\n \/\/ \u305d\u308c\u305e\u308c\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\n currentCount++;\n sic.Count++;\n scp.Count++;\n trn.Count++;\n \/\/ Singleton\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u751f\u3055\u305b\u308b\n sic.BubbleSingletonEvent(this,new EventArgs());\n }\n}<\/code><\/pre><\/div>\n\n\n\n\u5b9f\u884c\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n\n\n\n<\/video><\/figure>\n\n\n\n\u3053\u306e\u3088\u3046\u306b\u3001Singleton\uff0cScoped\u306e\u5834\u5408\u306f\u3001\u30da\u30fc\u30b8\u9077\u79fb\u3057\u3066\u3082\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4fdd\u6301\u3055\u308c\u308b\u304c\u3001Transient\u306e\u5834\u5408\u306f\u30da\u30fc\u30b8\u9077\u79fb\u3059\u308b\u3068\u3001\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4f5c\u6210\u3055\u308c\u308b\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001Singleton\u306e\u5834\u5408\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u3067Singleton\u3068\u306a\u308b\u306e\u3067\u3001\u5225\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3082\u5171\u6709\u3055\u308c\u308b\u3002<\/p>\n\n\n\n\u5225\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/figcaption><\/figure>\n\n\n\n\u3053\u306e\u4f8b\u3067\u306f\u3001Singleton\u306b\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u30dc\u30bf\u30f3\u30af\u30ea\u30c3\u30af\u6642\u306b\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u751f\u3055\u305b\u3066\u3044\u308b\u305f\u3081\u3001\u5225\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u30dc\u30bf\u30f3\u304c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u5408\u3001Singleton\u306e\u30ab\u30a6\u30f3\u30c8\u304c\u30a2\u30c3\u30d7\u3055\u308c\u3066\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n\n\n\n
DI\u306e\u52d5\u4f5c\u304c\u6c17\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u30e1\u30e2\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
.net\u306eDI(Dependency Injection)\u306f\u6307\u5b9a\u65b9\u6cd5\u306b\u3088\u3063\u3066\u3001\u305d … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,12,10,9,4],"tags":[],"class_list":["post-827","post","type-post","status-publish","format-standard","hentry","category-net","category-asp-net-core","category-blazor","category-c","category-4"],"_links":{"self":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=827"}],"version-history":[{"count":2,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827\/revisions"}],"predecessor-version":[{"id":952,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827\/revisions\/952"}],"wp:attachment":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}