化零为整WCF(6) - 消息处理(异步调用OneWay, 双向通讯Duplex)

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化零为整WCF(6) - 消息处理(异步调用OneWay, 双向通讯Duplex)

作者：webabcd


介绍
WCF(Windows Communication Foundation) - 消息处理：通过操作契约的IsOneWay参数实现异步调用，基于Http, TCP, Named Pipe, MSMQ的双向通讯。


示例(异步调用OneWay)
1、服务
IOneWay.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.Message
{
     /// <summary>
        /// IOneWay接口
        /// </summary>
        [ServiceContract]
        public interface IOneWay
        {
                /// <summary>
                /// 不使用OneWay(同步调用)
                /// </summary>
                [OperationContract]
                void WithoutOneWay();

                /// <summary>
                /// 使用OneWay(异步调用)
                /// </summary>
                [OperationContract(IsOneWay=true)]
                void WithOneWay();
        }
}

 

OneWay.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.Message
{
        /// <summary>
        /// OneWay类
        /// </summary>
        public class OneWay : IOneWay
        {
                /// <summary>
                /// 不使用OneWay(同步调用)
                /// 抛出Exception异常
                /// </summary>
                public void WithoutOneWay()
                {
                        throw new System.Exception("抛出Exception异常");
                }

                /// <summary>
                /// 使用OneWay(异步调用)
                /// 抛出Exception异常
                /// </summary>
                public void WithOneWay()
                {
                        throw new System.Exception("抛出Exception异常");
                }
        }
}

 

 

2、宿主
OneWay.cs

using (ServiceHost host = new ServiceHost(typeof(WCF.ServiceLib.Message.OneWay)))
{
        host.Open();

        Console.WriteLine("服务已启动(WCF.ServiceLib.Message.OneWay)");
        Console.WriteLine("按<ENTER>停止服务");
        Console.ReadLine();

}

 

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <services>
            <!--name - 提供服务的类名-->
            <!--behaviorConfiguration - 指定相关的行为配置-->
            <service name="WCF.ServiceLib.Message.OneWay" behaviorConfiguration="MessageBehavior">
                <!--address - 服务地址-->
                <!--binding - 通信方式-->
                <!--contract - 服务契约-->
                <endpoint address="" binding="basicHttpBinding" contract="WCF.ServiceLib.Message.IOneWay" />
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:12345/Message/OneWay/"/>
                    </baseAddresses>
                </host>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="MessageBehavior">
                    <!--httpGetEnabled - 使用get方式提供服务-->
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

 

3、客户端

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Windows.Forms;
using System.ServiceModel;

namespace Client2.Message
{
        /// <summary>
        /// 演示Message.OneWay的类
        /// </summary>
        public class OneWay
        {
                /// <summary>
                /// 调用IsOneWay=true的操作契约（异步操作）
                /// </summary>
                public void HelloWithOneWay()
                {
                        try
                        {
                                var proxy = new MessageSvc.OneWay.OneWayClient();

                                proxy.WithOneWay();

                                proxy.Close();
                        }
                        catch (Exception ex)
                        {
                                MessageBox.Show(ex.ToString());
                        }
                }

                /// <summary>
                /// 调用IsOneWay=false的操作契约（同步操作）
                /// </summary>
                public void HelloWithoutOneWay()
                {
                        try
                        {
                                var proxy = new MessageSvc.OneWay.OneWayClient();

                                proxy.WithoutOneWay();

                                proxy.Close();
                        }
                        catch (Exception ex)
                        {
                                MessageBox.Show(ex.ToString());
                        }
                }
        }
}

 

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <client>
            <!--address - 服务地址-->
            <!--binding - 通信方式-->
            <!--contract - 服务契约-->
            <endpoint address="http://localhost:12345/Message/OneWay/" binding="basicHttpBinding" contract="MessageSvc.OneWay.IOneWay" />
        </client>
    </system.serviceModel>
</configuration>

 

 

运行结果：
单击"btnWithOneWay"按钮，没有弹出提示框。（异步操作）
单击"btnWithoutOneWay"按钮，弹出错误提示框。（同步操作）



示例(双向通讯Duplex)
1、服务
IDuplex.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.Message
{
        /// <summary>
        /// IDuplex接口
        /// </summary>
        /// <remarks>
        /// CallbackContract - 回调接口
        /// </remarks>
        [ServiceContract(CallbackContract = typeof(IDuplexCallback))]
        public interface IDuplex
        {
                /// <summary>
                /// Hello
                /// </summary>
                /// <param name="name">名字</param>
                [OperationContract(IsOneWay = true)]
                void HelloDuplex(string name);
        }

        /// <summary>
        /// IDuplex回调接口
        /// </summary>
        public interface IDuplexCallback
        {
                /// <summary>
                /// Hello
                /// </summary>
                /// <param name="name"></param>
                [OperationContract(IsOneWay = true)]
                void HelloDuplexCallback(string name);
        }
}

 

Duplex.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.Message
{
        /// <summary>
        /// Duplex类
        /// </summary>
        public class Duplex : IDuplex
        {
                /// <summary>
                /// Hello
                /// </summary>
                /// <param name="name">名字</param>
                public void HelloDuplex(string name)
                {
                        // 声明回调接口
                        IDuplexCallback callback = OperationContext.Current.GetCallbackChannel<IDuplexCallback>();
                        
                        // 调用回调接口中的方法
                        callback.HelloDuplexCallback(name);
                }
        }
}

 

 

2、宿主
Duplex.cs

using (ServiceHost host = new ServiceHost(typeof(WCF.ServiceLib.Message.Duplex)))
{
        host.Open();

        Console.WriteLine("服务已启动(WCF.ServiceLib.Message.Duplex)");
        Console.WriteLine("按<ENTER>停止服务");
        Console.ReadLine();

}

 

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <services>
            <!--name - 提供服务的类名-->
            <!--behaviorConfiguration - 指定相关的行为配置-->
            <service name="WCF.ServiceLib.Message.Duplex" behaviorConfiguration="MessageBehavior">
                <!--address - 服务地址-->
                <!--binding - 通信方式-->
                <!--contract - 服务契约-->
                <!--双向通讯可以基于Http, TCP, Named Pipe, MSMQ；其中基于Http的双向通讯会创建两个信道(Channel)，即需要创建两个http连接-->
                <!--endpoint address="Message/Duplex" binding="wsDualHttpBinding" contract="WCF.ServiceLib.Message.IDuplex" /-->
                <endpoint address="Message/Duplex" binding="netTcpBinding" contract="WCF.ServiceLib.Message.IDuplex" />
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:12345/Message/Duplex"/>
                        <add baseAddress="net.tcp://localhost:54321/"/>
                    </baseAddresses>
                </host>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="MessageBehavior">
                    <!--httpGetEnabled - 使用get方式提供服务-->
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

 

 

3、客户端
Duplex.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;
using System.Windows.Forms;

namespace Client2.Message
{
        /// <summary>
        /// 演示Message.Duplex的类
        /// </summary>
        public class Duplex
        {
                /// <summary>
                /// Hello
                /// </summary>
                /// <param name="name">名字</param>
                public void HelloDulex(string name)
                {
                        var ct = new Client2.Message.CallbackType();
                        var ctx = new InstanceContext(ct);

                        var proxy = new MessageSvc.Duplex.DuplexClient(ctx);

                        proxy.HelloDuplex(name);
                }
        }
}

 

CallbackType.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Windows.Forms;

namespace Client2.Message
{
        /// <summary>
        /// 实现回调接口
        /// </summary>
        public class CallbackType : MessageSvc.Duplex.IDuplexCallback
        {
                /// <summary>
                /// Hello
                /// </summary>
                /// <param name="name">名字</param>
                public void HelloDuplexCallback(string name)
                {
                        MessageBox.Show("Hello: " + name);
                }
        }
}

 

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <client>
            <!--address - 服务地址-->
            <!--binding - 通信方式-->
            <!--contract - 服务契约-->
            <!--endpoint address="http://localhost:12345/Message/Duplex/" binding="wsDualHttpBinding" contract="MessageSvc.Duplex.IDuplex" /-->
            <endpoint address="net.tcp://localhost:54321/Message/Duplex" binding="netTcpBinding" contract="MessageSvc.Duplex.IDuplex" />
        </client>
    </system.serviceModel>
</configuration>

 

 

运行结果：
单击"btnDuplex"按钮后弹出提示框，显示"Hello: webabcd"


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