化零为整WCF(8) - 消息处理(使用流数据传输文件)


		作者：webabcd

介绍
WCF(Windows Communication Foundation) - 消息处理：使用流数据传输文件，减少内存开销。

示例
1、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();
        }
    }
}

2、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>
   &n

补充：综合编程 , 其他综合 ,