如何将参数传递给ServiceHost的

Question

我做了以下

//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(); 
    } 

我需要传递参数给服务，我无法弄清楚如何。我曾看过How do I pass values to the constructor on my wcf service?，但无法摆脱困境。谢谢

Answer 1

如果我理解正确，你想传递参数给你的服务实现类的构造函数。你可以通过passing an instance of the service class to the ServiceHost constructor来代替它的类型。那就是：

// 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你正在使用的服务类的单一实例。如果您需要每个会话或每个请求新的实例，请考虑使用ServiceHostFactory，如this answer中所述。