C# 选择特定WCF客户端的运行时决策

在我当前的项目中，我有这种情况。尽我所能去解释。 如果你有任何问题，请告诉我

 public bool CancelService(int serviceId, int userID)
    {
        var serviceResponse = ServiceClient.CancelService(serviceId, userID);
    }


//This Service call is throwing casting issues 
    private IContractsService ServiceClient
    {
        get
        {
            if (ContractType == CviValues.ContractTypeIDH)
            {
                return (Presentation.CommonService.IContractsService)IDHServiceClient;
            }
            else if (ContractType == CviValues.ContractTypeIpa)
            {
                return (Presentation.CommonService.IContractsService)IPAServiceClient;
            }
            else
            {
                return (Presentation.CommonService.IContractsService)CommonServiceClient;
            }
        }
    }

    private Presentation.IDHService.ContractsServiceClient _iDHServiceClient;
    private Presentation.IDHService.ContractsServiceClient IDHServiceClient
    {
        get
        {
            if (_iDHServiceClient == null)
            {
                _iDHServiceClient = new Presentation.IDHService.ContractsServiceClient(
                    new BasicHttpBinding(BasicHttpSecurityMode.None) { MaxReceivedMessageSize = Int32.MaxValue, OpenTimeout = new TimeSpan(0, 2, 0), ReceiveTimeout = new TimeSpan(0, 10, 0), SendTimeout = new TimeSpan(0, 2, 0) },
                    new EndpointAddress(ValueUtilities.IDHContractsServiceEndpointUrl));
            }
            return _iDHServiceClient;
        }
    }

    private Presentation.CommonService.ContractsServiceClient _commonServiceClient;
    private Presentation.CommonService.ContractsServiceClient CommonServiceClient
    {
        get
        {
            if (_commonServiceClient == null)
            {
                _commonServiceClient = new Presentation.CommonService.ContractsServiceClient(
                    new BasicHttpBinding(BasicHttpSecurityMode.None) { MaxReceivedMessageSize = Int32.MaxValue, OpenTimeout = new TimeSpan(0, 2, 0), ReceiveTimeout = new TimeSpan(0, 10, 0), SendTimeout = new TimeSpan(0, 2, 0) },
                    new EndpointAddress(ValueUtilities.CommonContractsServiceEndpointUrl));
            }
            return _commonServiceClient;
        }
    }

    private Presentation.IPAService.ContractsServiceClient _iPAServiceClient;
    private Presentation.IPAService.ContractsServiceClient IPAServiceClient
    {
        get
        {
            if (_iPAServiceClient == null)
            {
                _iPAServiceClient = new Presentation.IPAService.ContractsServiceClient(
                    new BasicHttpBinding(BasicHttpSecurityMode.None) { MaxReceivedMessageSize = Int32.MaxValue, OpenTimeout = new TimeSpan(0, 2, 0), ReceiveTimeout = new TimeSpan(0, 10, 0), SendTimeout = new TimeSpan(0, 2, 0) },
                    new EndpointAddress(ValueUtilities.IPAContractsServiceEndpointUrl));
            }
            return _iPAServiceClient;
        }
    }

注意事项：

IDHServiceClient、CommonServiceClient和IPAServiceClient都在各自的svc文件中实现icontractservice，因此所有客户端都具有相同的公开方法。但名称空间不同

CancelService等方法分散在整个项目中，因此需要更改ServiceClient属性以返回正确的客户端

问题==>需要更改ServiceClient属性以返回正确的客户端

好处==>我不必更改代码ServiceClient.CancelService和此类调用（这些调用都在代码中）

---

我如何做到这一点？

有人知道解决方案吗？与其存储

ConType

，为什么不存储实际的客户端？@JohnSaunders我修改了我的问题，我想知道的是如何在ServiceClient属性中进行转换？