前幾天分享了分享了WCF聊天程序--WCFChat ，本文和大家一起分享利用WCF實現文件的傳輸。
程序運行效果：
接收文件端：

發送文件端：連接WCF服務，選擇要傳輸的文件

文件傳輸成功：

我們會在保存文件的默認路徑：C:\Documents and Settings\Administrator\桌面，下看到傳輸的文件:


代碼分析：
這里就不一一的闡述每一句代碼的作用了，感興趣的朋友可以下載，文后會有下載鏈接。說下值得注意的地方：
前兩天有人在百度知道中問能不能把WCF中的契約單獨封裝到一個類庫中，當時感覺多此一舉，無意中看到把接口單獨分出去，有個很好的應用，就是利用通道實現客戶端代理。
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);//文件傳輸
????}


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

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

????????[MessageBodyMember(Order?=?1)]
????????public?Stream?FileData;//文件傳輸時間
????}
}
利用通道創建客戶端代理：
Code
if?(_proxy?==?null)
????????????{
????????????????try
????????????????{
????????????????????NetTcpBinding?binding?=?new?NetTcpBinding();
????????????????????binding.TransferMode?=?TransferMode.Streamed;
????????????????????binding.SendTimeout?=?new?TimeSpan(0,?30,?0);
????????????????????//利用通道創建客戶端代理
????????????????????_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;
????????????????}這樣，既不用添加服務引用，也不需要生成代理。
文件傳輸的函數不是很難，代碼如下：
Code
public?void?TransferFile(FileTransferMessage?request)
????????{
????????????string?logInfo;

????????????Program.Get_ILog().Log(logInfo?=?string.Format("開始接收文件,name={0}",?request.FileName));//填寫日志
????????????//文件信息
????????????string?uploadFolder?=?AppValue.GetParam()._saveDir;
????????????string?savaPath?=?request.SavePath;
????????????string?fileName?=?request.FileName;
????????????Stream?sourceStream?=?request.FileData;
????????????FileStream?targetStream?=?null;
????????????//判斷文件是否可讀
????????????if?(!sourceStream.CanRead)
????????????{
????????????????throw?new?Exception("數據流不可讀!");
????????????}
????????????if?(savaPath?==?null)?savaPath?=?@"文件傳輸\";
????????????if?(!savaPath.EndsWith("\\"))?savaPath?+=?"\\";
????????????if?(!uploadFolder.EndsWith("\\"))?uploadFolder?+=?"\\";

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

????????????int?fileSize?=?0;
????????????string?filePath?=?Path.Combine(uploadFolder,?fileName);//Combine合并兩個路徑
????????????try
????????????{
????????????????//文件流傳輸
????????????????using?(targetStream?=?new?FileStream(filePath,?FileMode.Create,?FileAccess.Write,?FileShare.None))
????????????????{
????????????????????//定義文件緩沖區
????????????????????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("接收文件完畢?name={0},filesize={1}",
??????????????request.FileName,?fileSize));
????????}

其他的代碼感興趣的朋友下載來研究吧！

源代碼：
/Files/gaoweipeng/WCFFileTransfer.rar

轉載于:https://www.cnblogs.com/gaoweipeng/archive/2009/09/13/1565409.html

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