Dotnetcore 装饰器没有被调用？答案

【问题标题】：Dotnetcore Decorator is not getting called?Dotnetcore 装饰器没有被调用？
【发布时间】：2020-06-13 15:19:16
【问题描述】：

我的项目在 dotnet core 3.1 中，我正在使用 Scrutor 工具为装饰器注入依赖项。我有以下结构：

internal interface IProvider 
{
     Task<Response> Get()
}

internal sealed class Provider : IProvider
{
    public async Task<Response> Get()
    {
          Console.writeline("Some stuff");
    }
}

internal static class ProvideExtensions
{
    public static Task<Response[]> Get(this IProvider provider)
    {
      provider.Get()      
    }
}


internal sealed class ProviderDecorator : IProvider
{
    private readonly IProvider _inner;

    ProviderDecorator(IProvider inner){
    _inner = inner;

    }

    public async Task<Response> Get()
    {
          Console.writeline("Some stuff");
          Console.writeline("Some stuff" + "other stuff");
    }

}

Startup.cs 上的依赖注入：

    services.AddSingleton<IProvider, Provider>();
    services.Decorate<IProvider, ProviderDecorator>();

【问题讨论】：

标签： asp.net-core .net-core dependency-injection asp.net-core-webapi decorator

【解决方案1】：

公开IProvider

public interface IProvider
{
    Task<Response> Get();
}
internal sealed class Provider : IProvider
{
    public async Task<Response> Get()
    {
        Console.WriteLine("Some stuff");
        return new Response();
    }
}
internal static class ProvideExtensions
{
    public static Task<Response> Get(this IProvider provider)
    {
        return provider.Get();
    }
}
internal sealed class ProviderDecorator : IProvider
{
    private readonly IProvider _inner;

    public ProviderDecorator(IProvider inner)
    {
        _inner = inner;
    }

    public async Task<Response> Get()
    {
        Console.WriteLine("Some stuff");
        Console.WriteLine("Some stuff" + "other stuff");

        return new Response();
    }

}
public class Response { }

【讨论】：