wcf - 如何将参数传递给 ServiceHost

Question

我正在做以下事情

 //Define the service host
        this._smeediPluginServiceHost = new ServiceHost(typeof(SmeediServiceHost), smeediServiceUri);
        this._smeediPluginServiceHost.AddServiceEndpoint(typeof(ISmeediServiceHost), GetBinding(), smeediServiceUri);
        SetupAndStartWebService(_smeediPluginServiceHost); 


  private void SetupAndStartWebService(ServiceHost serviceHost, ServiceDiscoveryBehavior serviceDiscoveryBehavior = null)
    {
        //Define service behaviours
        ServiceMetadataBehavior serviceMetadataBehavior = new ServiceMetadataBehavior();
        serviceMetadataBehavior.HttpGetEnabled = true;

        //Add the behaviours to the service
        serviceHost.Description.Behaviors.Add(serviceMetadataBehavior);

        if (serviceDiscoveryBehavior != null)
            serviceHost.Description.Behaviors.Add(serviceDiscoveryBehavior);

        serviceHost.Open();
    }  

我需要向服务传递一个参数，但我不知道怎么做。我看过 How do I pass values to the constructor on my wcf service?但无法理解它。谢谢

Answer 1

如果我理解正确，您希望将参数传递给服务实现类的构造函数。您可以通过 passing an instance of the service class to the ServiceHost constructor , 而不是它的类型。那是:

// Create the service instance
var instance = new SmeediServiceHost("some parameters");

// Define the service host using the above instance
this._smeediPluginServiceHost = new ServiceHost(instance, smeediServiceUri);

注意 - 使用这种方法意味着您正在使用服务类的单例实例。如果每个 session 或每个请求需要一个新实例，请考虑使用 ServiceHostFactory如 this answer 中所述.