IServiceBehavior和ApplyDispatchBehavior的简单示例

using System;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;

// 自定义服务行为
public class CustomServiceBehavior : Attribute, IServiceBehavior
{
    // 实现ApplyDispatchBehavior方法
    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        foreach (ChannelDispatcherBase channelDispatcherBase in serviceHostBase.ChannelDispatchers)
        {
            ChannelDispatcher channelDispatcher = channelDispatcherBase as ChannelDispatcher;
            if (channelDispatcher != null)
            {
                foreach (EndpointDispatcher endpointDispatcher in channelDispatcher.Endpoints)
                {
                    // 添加自定义消息拦截器
                    endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new CustomMessageInspector());
                }
            }
        }
    }

    // 实现AddBindingParameters方法
    public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
    {
        // 可以在这里添加绑定参数
    }

    // 实现Validate方法
    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        // 可以在这里进行服务验证
    }
}

// 自定义消息拦截器
public class CustomMessageInspector : IDispatchMessageInspector
{
    public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
    {
        // 在接收到请求后进行处理
        return null;
    }

    public void BeforeSendReply(ref Message reply, object correlationState)
    {
        // 在发送回复前进行处理
    }
}

// 服务契约
[ServiceContract]
public interface ICustomService
{
    [OperationContract]
    string GetData(int value);
}

// 服务实现
public class CustomService : ICustomService
{
    public string GetData(int value)
    {
        return string.Format("You entered: {0}", value);
    }
}

// 服务主机
public class Program
{
    public static void Main(string[] args)
    {
        using (ServiceHost host = new ServiceHost(typeof(CustomService)))
        {
            // 添加自定义服务行为
            host.Description.Behaviors.Add(new CustomServiceBehavior());

            // 启动服务
            host.Open();

            Console.WriteLine("Service started. Press any key to stop.");
            Console.ReadKey();

            // 停止服务
            host.Close();
        }
    }
}