API中的System.AggregateException“無法構造某些服務”

在我的 API 中，我必須包裝一個 WCF 服務，我添加了對專案的參考，并將它添加到 IServiceCollection

services.AddScoped<IServiceClient, ServiceClient>(sp =>
  new ServiceClient($"{configuration.GetValue<string>(Constant.Url)}"));

我的 ServiceClient 類：

public class ServiceClient: IServiceClient 
{

  private string urlService;

  // WCF Service to wrapp
  private WCFServiceReference.WCFServiceServiceClient _WCFServiceServiceClient; 

  public ServiceClient(string urlService) 
  {
    this.urlService = urlService;
    BasicHttpBinding basicHttpBinding = new BasicHttpBinding();
    this._WCFServiceServiceClient = new WCFServiceReference.WCFServiceServiceClient(basicHttpBinding, new EndpointAddress(this.urlService));
  }

  public Task<CalculateResponse> CalculateAsync(Request input) 
  {
    return CalculateAsync(input, CancellationToken.None);
  }

  public Task<GetProductListResponse> GetProductListAsync(ProductRequest input) 
  {
    return GetElencoProdottiAsync(input, CancellationToken.None);
  }

  public Task<GetVariableOfProductResponse> GetVariableOfProductAsync(GetVariableRequest input) 
  {
    return GetVariableOfProductAsync(input, CancellationToken.None);
  }

  private Task<GetProductListResponse> GetProductListAsync(ProductRequest input, CancellationToken none
  {
    return this._WCFServiceServiceClient.GetProductListAsync(input);
  }

  private Task<GetVariableOfProductResponse> GetVariableOfProductAsync(GetVariableRequest input, CancellationToken none) 
  {
    return this._WCFServiceServiceClient.GetVariableOfProductAsync(input);
  }

  private Task<CalculateResponse> CalculateAsync(Request input, CancellationToken none) 
  {
    return this._WCFServiceServiceClient.CalculateAsync(input);
  }

}

當我啟動我的應用程式時，CreateHostBuilder(args).Build().Run(); Main 中的這個呼叫會引發以下例外：

某些服務無法構建（驗證服務描述符“ServiceType：Namespace.IProductService Lifetime：Scoped ImplementationType：Namespace.ProductService”時出錯：嘗試激活“Namespace.ProductService”時無法決議“Namespace.ServiceClient”型別的服務'。）

uj5u.com熱心網友回復：

您的ProductService服務生命周期是多少？

單例無法決議 Scope 服務

uj5u.com熱心網友回復：

也許你可以試試這個，你可以看看這篇文章的細節。

 public class ServiceClient : IServiceClient
    {
      ...
       public ServiceClient(IServiceClient ServiceClient)
       {
           ...
       }
    }

uj5u.com熱心網友回復：

我關注這篇文章所以我修改了我的包裝器：

public class ServiceClient : ClientBase<WCFServiceReference.IWCFServiceServiceClient>, WCFServiceReference.IWCFServiceServiceClient, IServiceClient
    {
        private string urlService;
        private WCFServiceReference.WCFServiceServiceClient _WCFServiceServiceClient; //WCF Service to wrapp

         public ServiceClient(IOptions<ServiceClientOptions> options) : base()
        {
            if (options == null)
            {
                throw new ArgumentNullException(nameof(options));
            }

            this.Endpoint.Address = new EndpointAddress(options.Value.BaseUrl);
        }

        public Task<CalculateResponse> CalculateAsync(Request input)
        {
            return CalculateAsync(input, CancellationToken.None);
        }

        public Task<GetProductListResponse> GetProductListAsync(ProductRequest input)
        {
            return GetElencoProdottiAsync(input, CancellationToken.None);
        }

        public Task<GetVariableOfProductResponse> GetVariableOfProductAsync(GetVariableRequest input)
        {
            return GetVariableOfProductAsync(input, CancellationToken.None);
        }

        private Task<GetProductListResponse> GetProductListAsync(ProductRequest input, CancellationToken none)
        {
            return this.Channel.GetProductListAsync(input);
        }

        private Task<GetVariableOfProductResponse> GetVariableOfProductAsync(GetVariableRequest input, CancellationToken none)
        {
            return this.Channel.GetVariableOfProductAsync(input);
        }

        private Task<CalculateResponse> CalculateAsync(Request input, CancellationToken none)
        {
            return this.Channel.CalculateAsync(input);
        }
    }

而這個配置：

services.AddScoped<IServiceClient>(provider => {
                
                var options = new ServiceClientOptions
                {
                    BaseUrl = configuration.GetValue<string>(ApplicationConstant.UrlWCFExample)
                };

                var client = new ServiceClient((Microsoft.Extensions.Options.IOptions<QuickServiceClientOptions>)options);

                 return client;
             });

但我得到同樣的錯誤

標籤：C＃ wcf

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