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Create: 2025-06-06 Update: 2025-07-01 01:34:49

🧩 Blazor и Dependency Injection: лучшие практики и примеры

В Blazor встроена мощная система Dependency Injection (DI), которая помогает создавать модульные и легко тестируемые приложения. Недавно на [Telerik Blog](https://www.telerik.com/blogs/blazor-basics-dependency-injection-best-practices-use-cases) вышла отличная статья с практическими советами по использованию DI в Blazor.

🔧 Типы внедрения зависимостей:
- Constructor Injection: предпочтительный способ для обязательных зависимостей.
- Property Injection: используется для опциональных зависимостей с помощью @inject или [Inject].
- Service Locator: избегайте этого подхода, так как он усложняет тестирование и нарушает принципы DI.

🔄 Варианты времени жизни сервисов:
- Singleton: один экземпляр на всё приложение.
- Scoped: один экземпляр на сессию пользователя.
- Transient: новый экземпляр при каждом запросе.

💡 Рекомендации:
- Используйте интерфейсы для определения зависимостей.
- Избегайте внедрения Scoped сервисов в Singleton сервисы.
- Для управления временем жизни сервисов используйте OwningComponentBase.

📚 Примеры использования:
- Внедрение HttpClient для выполнения HTTP-запросов.
- Использование NavigationManager для управления навигацией.
- Внедрение IJSRuntime для взаимодействия с JavaScript.

📖 Подробнее читайте в статье

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🧩 Blazor и Dependency Injection: лучшие практики и примеры

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