c# - 添加依赖注入会在 .NET Core 中产生异常

Question

我收到以下异常。为什么会这样，我该如何解决？

当SMSService.cs我评论构造函数时，它开始工作，但我需要ISMSSender从它访问。

System.AggregateException：'某些服务无法构造（验证服务描述符时出错'ServiceType：Authentication.API.Repository.Interface.ISMSService Lifetime：Singleton ImplementationType：Authentication.API.Repository.SMSService'：无法解析服务尝试激活“Authentication.API.Repository.SMSService”时输入“SMSSender.API.Repository.Interface.ISMSSender”。）

Authentication.API.Repository.SMSService

public class SMSService : ISMSService
{
    private readonly ISMSSender _smsSender;

    public SMSService(ISMSSender smsSender)
    {
        _smsSender = smsSender;
    }
}

启动 ...

         services.AddTransient<ISMSService, SMSService>();

         ...

SMSSender.API.Repository.Interface.ISMSSender

public interface ISMSSender
{
    Task<SMSUser> SendSMS(SMSUser prospectiveUser);
}

SMSSender.API.Repository.Interface.SMSSender

public class SMSSender : ISMSSender
{
    public async Task<SMSUser> SendSMS(SMSUser sMSUser)
    { }

}

标签： c#.net-coredependency-injection

Answer 1

看起来你没有注册 SMSSender（你做了服务）：

services.AddTransient<ISMSService, SMSService>();
services.AddTransient<ISMSSender, SMSSender>();