用C#实现FTP,在客户端将大文件上传到服务器,怎样才能断点继续上传(请给个例码)?????

Question

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Answer 1

我也想知道？上面的，我现在也在搞ftp客户端的开发！
问个界面上的问题问：
treeview中添加和删除节点后，怎么让他显示当前的（相当于保留当前的节点）
怎么我删除和添加后，待下次在启动的时候一切都复原了呢？ 
你是怎么实现的？

Answer 2

ftp协议不支持这个特性
有些ftp服务器的“支持”，是通过把多次上传的文件不同部分拼接而成的
只有下载时能做到断点续传

Answer 3

qiezic(qiezi) 
能否说详细点

Answer 4

有关UdpClient
http://msdn.microsoft.com/library/chs/default.asp?url=/library/CHS/cpref/html/frlrfsystemnetsocketsudpclientclasstopic.asp
另外Sunmast说的很对，估计你要自己写代码实现你所谓的断点续传了。有关下载时断点续传的CODE
static void Main(string[] args)
              {
                     
                     string StrFileName="c:\\aa.zip";      //根据实际情况设置
                     string StrUrl="http://www.xxxx.cn/xxxxx.zip";   //根据实际情况设置
 
                     //打开上次下载的文件或新建文件
                     long lStartPos =0;
                     System.IO.FileStream fs;
                     if (System.IO.File.Exists(StrFileName))
                     {
                            fs= System.IO.File.OpenWrite(StrFileName);
                            lStartPos=fs.Length;
                            fs.Seek(lStartPos,System.IO.SeekOrigin.Current);   //移动文件流中的当前指针
                     }
                     else
                     {
                            fs = new System.IO.FileStream(StrFileName,System.IO.FileMode.Create);
                            lStartPos =0;
                     }
                     
                     //打开网络连接
                     try
                     {
                            System.Net.HttpWebRequest request =(System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);
                            if ( lStartPos>0)
                                   request.AddRange((int)lStartPos);    //设置Range值
                            
                            //向服务器请求，获得服务器回应数据流
                            System.IO.Stream ns= request.GetResponse().GetResponseStream();
 
                            byte[] nbytes = new byte[512];
                            int nReadSize=0;
                            nReadSize=ns.Read(nbytes,0,512);
                            while( nReadSize >0)
                            {
                                   fs.Write(nbytes,0,nReadSize);
                                   nReadSize=ns.Read(nbytes,0,512);
                            }
                            fs.Close();
                            ns.Close();
                            Console.WriteLine("下载完成");
                     }
                     catch(Exception ex)
                     {
                            fs.Close();
                            Console.WriteLine("下载过程中出现错误:"+ex.ToString());
                     }
              }

Answer 5

Sunmast(速马|AIR SUPPLY!) 
小弟不才,可有代码一看