winform如何实现文件传输

[yuliang2987780]

如题。。。两个用户之间如何达到文件的传送

[十八道胡同]

可以通过读写本地文件

[元宇宙之家]

C# Socket 转送 byte[](把文件读取成byte[])

[hhc123]

filestream=new FileStream(richTextBox2.Lines[j-2].ToString(),FileMode.Open,FileAccess.Read);
							
			//定义缓冲区
			byte[] bb=new byte[1024];	
			//循环读文件
			 
			while((number=filestream.Read(bb,0,1024))!=0)
			{//向客户端发送流
				//sock.Send(bb,bb.Length,0);
				
				stream.Write(bb,0,1024);
				//刷新流
				stream.Flush();
								
				bb=new byte[1024];
				
							  
			}
			bb=new byte[1024];
			bb=System.Text.Encoding.ASCII.GetBytes("<EOF>");
			sock.Send(bb);
			stream.Flush();
		 			
			filestream.Close();
			//sock.Close();
			stream.Close();

private void down(ref NetworkStream stream)
		{ 
			int length=1024;
			byte[] bye=new byte[1024];

			int tt=stream.Read(bye,0,length);
		
			//下行循环读取网络流并写进文件
			while(tt>0)
			{ 
				
				
				
				
			   string ss=System.Text.Encoding.ASCII.GetString(bye);
			   int x=ss.IndexOf("<EOF>");
				if(x!=-1)
				{
					
					filestream.Write(bye,0,x);
					filestream.Flush();	
					break;
				}
				else
				{
					filestream.Write(bye,0,tt);
					filestream.Flush();
				}
				tt=stream.Read(bye,0,length);
				 
			}//对用于while(!control)的“｛”
		
			filestream.Close();
			 
	 
			MessageBox.Show("下载完毕！");

[jayqean]

点对点传送（P2P）

/// <summary>
        /// 定义委托
        /// </summary>
        /// <param name="m_t">文件大小</param>
        /// <param name="m_p">当前位置</param>
        public delegate void SendFileHandler(int m_t, int m_p);
        /// <summary>
        /// 定义事件，这个事件将被主线程捕捉，并对主线程 进度条进行修改。
        /// </summary>
        public event SendFileHandler m_SpFlHandler;

        public void SendFile()
        {
            m_SpFlHandler += new SendFileHandler(ChgProgress);

            Thread t = new Thread(StartSend);
            t.Start();

        }
        //开始发送文件
        public void StartSend()
        {
            //连接到对方客服端
            p2pClient= this.GetP2PClient();
            ns=p2pClient.GetStream();

            FileStream fs = new FileStream(fullName, FileMode.Open, FileAccess.Read);
            this.progressBar1.Visible = true;
            this.label10.Visible = true;
            int m_totalSize = 0;
            int m_curPosition = 0;

            //源文件大小
            m_totalSize = (int)fs.Length;

            byte[] bys = new byte[length];
            while (true)
            {
                int read=fs.Read(bys, 0, bys.Length);
                if (read <= 0)
                {
                    break;
                }                

                ns.Write(bys, 0, bys.Length);
                ns.Flush();

                m_curPosition += read;
                this.label10.Text = string.Format("{0}%", (int)(m_curPosition*100/m_totalSize));
                //触发事件
                m_SpFlHandler(m_totalSize, m_curPosition);

                Thread.Sleep(50);
            }
            this.progressBar1.Visible = false;
            this.richTextBox2.Text += string.Format("文件:{0} 发送成功,(总大小:{1}KB)\r\n", fileName, (int)length / 1024);

            this.richTextBox2.SelectionStart = this.richTextBox2.Text.Length;
            this.richTextBox2.ScrollToCaret();
        }

        //改变进度条的值
        private void ChgProgress(int m_t, int m_p)
        {
            progressBar1.Maximum = m_t;
            progressBar1.Value = m_p;            
        }

[jayqean]

刚发的是发送方(夹带一进度条的显示) ,接收方类似

[gao19870901]

有点难度，我新手

[tianliang1]

用户间？
一般说来文件传输都要用Stream来实现...
看你的具体情况了，如果是同时操作系统，进行文件传输，类似于发邮件？

[guyehanxinlei]

如果可以直接访问、连接，可以直接进行文件的传输
Socket实现
FTP
Email
.......

[wuyq11]

如飞鸽传书
http://topic.csdn.net/u/20090826/09/19d4a1e1-b04c-4cdb-810c-5bb355cd9894.html