WCF文件传输

本文和大家一起分享利用WCF实现文件的传输。
程序运行效果：
接收文件端：
 

发送文件端：连接WCF服务，选择要传输的文件

文件传输成功：

我们会在保存文件的默认路径：C:\Documents and Settings\Administrator\桌面，下看到传输的文件:

代码分析：
这里就不一一的阐述每一句代码的作用了，感兴趣的朋友可以下载，文后会有下载链接。说下值得注意的地方：
前两天有人在百度知道中问能不能把WCF中的契约单独封装到一个类库中，当时感觉多此一举，无意中看到把接口单独分出去，有个很好的应用，就是利用通道实现客户端代理。
ITransfer.cs

Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.Runtime.Serialization;
using System.Threading;
using System.IO;

namespace FileInterface
{
    [ServiceContract]
    public interface ITransfer
    {
        [OperationContract(Action = "UploadFile")]
        void TransferFile(FileTransferMessage request);//文件传输
    }

    [MessageContract]
    public class FileTransferMessage
    {
        [MessageHeader(MustUnderstand = true)]
        public string SavePath;//文件保存路径

        [MessageHeader(MustUnderstand = true)]
        public string FileName;//文件名称

        [MessageBodyMember(Order = 1)]
        public Stream FileData;//文件传输时间
    }
}

利用通道创建客户端代理：

Code
if (_proxy == null)
            {
                try
                {
                    NetTcpBinding binding = new NetTcpBinding();
                    binding.TransferMode = TransferMode.Streamed;
                    binding.SendTimeout = new TimeSpan(0, 30, 0);
                    //利用通道创建客户端代理
                    _proxy = ChannelFactory<ITransfer>.CreateChannel(binding, new EndpointAddress(CBSerURL.Text));
                    IContextChannel obj = _proxy as IContextChannel;
                    //string s = obj.SessionId;

                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                    return;
                }
这样，既不用添加服务引用，也不需要生成代理。
文件传输的函数不是很难，代码如下：

Code
public void TransferFile(FileTransferMessage request)
        {
            string logInfo;

            Program.Get_ILog().Log(logInfo = string.Format("开始接收文件,name={0}", request.FileName));//填写日志
            //文件信息
            string uploadFolder = AppValue.GetParam()._saveDir;
            string savaPath = request.SavePath;
            string fileName = request.FileName;
            Stream sourceStream = request.FileData;
            FileStream targetStream = null;
            //判断文件是否可读
            if (!sourceStream.CanRead)
            {
                throw new Exception("数据流不可读!");
            }
            if (savaPath == null) savaPath = @"文件传输\";
            if (!savaPath.EndsWith("\\")) savaPath += "\\";
            if (!uploadFolder.EndsWith("\\")) uploadFolder += "\\";

            uploadFolder = uploadFolder + savaPath;
            //创建保存文件夹
            if (!Directory.Exists(uploadFolder))
            {
                Directory.CreateDirectory(uploadFolder);
            }

            int fileSize = 0;
            string filePath = Path.Combine(uploadFolder, fileName);//Combine合并两个路径
            try
            {
                //文件流传输
                using (targetStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
                {
                    //定义文件缓冲区
                    const int bufferLen = 4096;
                    byte[] buffer = new byte[bufferLen];
                    int count = 0;

                    while ((count = sourceStream.Read(buffer, 0, bufferLen)) > 0)
                    {
                        targetStream.Write(buffer, 0, count);
                        fileSize += count;
                    }
                    targetStream.Close();
                    sourceStream.Close();
                }
            }
            catch (Exception ex)
            {
                Program.Get_ILog().Log(logInfo + ex.Message);
            }

            Program.Get_ILog().Log(string.Format("接收文件完毕 name={0},filesize={1}",
              request.FileName, fileSize));
        }
其他的代码感兴趣的朋友下载来研究吧！

源代码下载