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前几天分享了分享了WCF聊天程序--WCFChat
，
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：
/Files/gaoweipeng/WCFFileTransfer.rar
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原文地址：http://www.cnblogs.com/qq260250932/p/5347532.html
