WCF是一个使用了托管代码建立的统一框架。它的应用可以帮助开发者创建一个安全性高,可依赖性的解决方案。那么今天,我们将会在这里为大家详细介绍一下其中WCF消息处理的相关概念。
使用托管代码建立和运行面向服务(Service Oriented)应用程序的统一框架
WCF消息处理:使用流数据传输文件,减少内存开销。
示例
1、WCF消息处理之服务
- IStreamed.cs
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.ServiceModel;
- using System.IO;
- namespace WCF.ServiceLib.Message
- {
- /**//// < summary>
- /// 消息契约(定义与 SOAP 消息相对应的强类型类)
- /// < /summary>
- [MessageContract]
- public class FileWrapper
- {
- /**//// < summary>
- /// 指定数据成员为 SOAP 消息头
- /// < /summary>
- [MessageHeader]
- public string FilePath;
- /**//// < summary>
- /// 指定将成员序列化为 SOAP 正文中的元素
- /// < /summary>
- [MessageBodyMember]
- public Stream FileData;
- }
- /**//// < summary>
- /// IStreamed接口
- /// < /summary>
- [ServiceContract]
- public interface IStreamed
- {
- /**//// < summary>
- /// 上传文件
- /// < /summary>
- /// < remarks>
- /// 1、支持数据流传输的绑定有:BasicHttpBinding、NetTcpBinding
和 NetNamedPipeBinding- /// 2、流数据类型必须是可序列化的 Stream 或 MemoryStream
- // /3、传递时消息体(Message Body)中不能包含其他数据,即参数中只能有一个
System.ServiceModel.MessageBodyMember- /**//// < /remarks>
- /// < param name="fileWrapper">WCF.ServiceLib.Message.FileWrapper< /param>
- [OperationContract]
- void UploadFile(FileWrapper fileWrapper);
- }
- }
- Streamed.cs
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.ServiceModel;
- using System.IO;
- namespace WCF.ServiceLib.Message
- {
- /**//// < summary>
- /// IStreamed类
- /// < /summary>
- public class Streamed : IStreamed
- {
- /**//// < summary>
- /// 上传文件
- /// < /summary>
- /// < param name="fileWrapper">WCF.ServiceLib.Message.
FileWrapper< /param>- public void UploadFile(FileWrapper fileWrapper)
- {
- var sourceStream = fileWrapper.FileData;
- var targetStream = new FileStream(fileWrapper.FilePath,
- FileMode.Create,
- FileAccess.Write,
- FileShare.None);
- var buffer = new byte[4096];
- var count = 0;
- while ((count = sourceStream.Read(buffer, 0, buffer.Length)) > 0)
- {
- targetStream.Write(buffer, 0, count);
- }
- targetStream.Close();
- sourceStream.Close();
- }
- }
- }
#p#
2、WCF消息处理之宿主
- Streamed.cs
- using (ServiceHost host = new ServiceHost(typeof
(WCF.ServiceLib.Message.Streamed)))- {
- host.Open();
- Console.WriteLine("服务已启动(WCF.ServiceLib.Message.Streamed)");
- 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.Streamed"
behaviorConfiguration="MessageBehavior">- < !--address - 服务地址-->
- < !--binding - 通信方式-->
- < !--contract - 服务契约-->
- < !--bindingConfiguration - 指定相关的绑定配置-->
- < endpoint address="Message/Streamed" binding="netTcpBinding"
contract="WCF.ServiceLib.Message.IStreamed"
bindingConfiguration="StreamedBindingConfiguration" />- < endpoint address="mex" binding="mexHttpBinding"
contract="IMetadataExchange" />- < host>
- < baseAddresses>
- < add baseAddress="http://localhost:12345/Message/Streamed/"/>
- < 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>
- < bindings>
- < netTcpBinding>
- < !--transferMode - 指示通道是使用流处理模式还是缓冲模式来传输请求和响应消息-->
- < !--maxReceivedMessageSize -
在采用此绑定配置的通道上可接收的***消息大小(单位:字节)-->- < !--receiveTimeout - 在传输引发异常之前可用于完成读取操作的时间间隔-->
- < binding name="StreamedBindingConfiguration" transferMode="Streamed"
maxReceivedMessageSize="1073741824" receiveTimeout="00:10:00" />- < /netTcpBinding>
- < /bindings>
- < /system.serviceModel>
- < /configuration>
3、WCF消息处理之客户端
- Streamed.cs
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Windows.Forms;
- using System.ServiceModel;
- using System.IO;
- namespace Client2.Message
- {
- /**//// < summary>
- /// 演示Message.Streamed的类
- /// < /summary>
- public class Streamed
- {
- /**//// < summary>
- /// 流数据上传文件
- /// < /summary>
- /// < param name="source">源文件地址< /param>
- /// < param name="destination">目标路径< /param>
- public void HelloStreamed(string source, string destination)
- {
- try
- {
- var proxy = new MessageSvc.Streamed.StreamedClient();
- var sr = new System.IO.FileStream(
- source, System.IO.FileMode.Open);
- proxy.UploadFile(destination + Path.GetFileName(source), sr);
- sr.Close();
- proxy.Close();
- MessageBox.Show("上传成功");
- }
- 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="net.tcp://localhost:54321/Message/Streamed"
binding="netTcpBinding" contract="MessageSvc.Streamed.IStreamed"
bindingConfiguration="StreamedBindingConfiguration" />- < /client>
- < bindings>
- < netTcpBinding>
- < !--transferMode - 指示通道是使用流处理模式还是缓冲模式来传输请求和响应消息-->
- < !--sendTimeout - 在传输引发异常之前可用于完成写入操作的时间间隔-->
- < binding name="StreamedBindingConfiguration"
transferMode="Streamed" sendTimeout="00:10:00" />- < /netTcpBinding>
- < /bindings>
- < /system.serviceModel>
- < /configuration>
以上就是对WCF消息处理的相关概念介绍。
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