wcf怎样不用配置文件设置最大会话数

Question

创建了WCF服务端 ServiceHost
怎样不用配置文件 直接用源码就能更改ServiceHost的MaxConcurrentCalls，MaxConcurrentInstances，MaxConcurrentSessions三个属性？

Answer 1

自定义一个 ServiceThrollAttribute 然后加到Service Class上。using:
using System;
using System.Collections.ObjectModel;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;ServiceThrottlingAttribute:
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
    public sealed class ServiceThrottlingAttribute : Attribute, IServiceBehavior
    {
        public int MaxConcurrentCalls { get; set; }
        public int MaxConcurrentInstances { get; set; }
        public int MaxConcurrentSessions { get; set; }
        public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
        {
        }
        public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
        {
        }        public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
        {
            var currentThrottle = serviceDescription.Behaviors.Find<ServiceThrottlingBehavior>();
            if (currentThrottle == null)
            {
                serviceDescription.Behaviors.Add(GetConfiguredServiceThrottlingBehaviour());
            }
        }        private ServiceThrottlingBehavior GetConfiguredServiceThrottlingBehaviour()
        {
            var behaviour = new ServiceThrottlingBehavior();
            if (MaxConcurrentCalls > 0)
            {
                behaviour.MaxConcurrentCalls = MaxConcurrentCalls;
            }
            if (MaxConcurrentInstances > 0)
            {
                behaviour.MaxConcurrentInstances = MaxConcurrentInstances;
            }
            if (MaxConcurrentSessions > 0)
            {
                behaviour.MaxConcurrentSessions = MaxConcurrentSessions;
            }
            return behaviour;
        }
    }使用：
[ServiceThrottlingAttribute(MaxConcurrentCalls=1, MaxConcurrentInstances=1, MaxConcurrentSessions=1)]
    public class Service1 : IService1
    {
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }
    }

Answer 2

我这样设置的 不知道对不对 求大神解答ServiceHost host = new ServiceHost(typeof(MyService), baseAddress);
...
ServiceThrottlingBehavior throttle;
throttle = new ServiceThrottlingBehavior();
throttle.MaxConcurrentCalls = 1000;
throttle.MaxConcurrentInstances = 1000;
throttle.MaxConcurrentSessions = 1000;
host.Description.Behaviors.Add(throttle);

Answer 3

为什么不直接在WCF配置文件里面设置呢

Answer 4

同问，如果是限制某个接口的流量大小，单独使用Attribute可以说的通。不太清楚为啥会话数限制也要单独去做。