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
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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
}
}
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利用通道创建客户端代理:
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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 ;
}
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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:
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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));
}
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其他的代码感兴趣的朋友下载来研究吧!