C#实现超大文件传输：发送与接收代码详解

发送端部分代码：
        public void startSendFileThread() {            
            try
            {               
                Thread sendFileThread = new Thread(new ThreadStart(sendFile));
                sendFileThread.Start();
            }
            catch {
                MessageBox.Show("线程开启或线程发送过中遇到问题失败。。。。。。");
                this.sendFlag = false;
            }
            finally
            {               
            }
        }        
        public void sendFile()
        {
            public Socket socketClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(userIP),userPort);
            try
            {
                //因为客户端只是用来向特定的服务器发送信息，所以不需要绑定本机的IP和端口。不需要监听。
                socketClient.SendBufferSize = 1024 * 1024*10;
                socketClient.ReceiveBufferSize = 1024 * 1024*10;
                socketClient.Connect(ipep);
               // MessageBox.Show("connected!!");
            }
            catch (SocketException e)
            {
                Console.WriteLine("unable to connect to server");

                Console.WriteLine(e.ToString());
            }
             FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            int partSize = 1024 * 100;
            long fileLength = fs.Length;
            long offset = 0;
            while (true)
            {
                if (offset + partSize >=fileLength) 
                            partSize = Convert.ToInt32(fileLength - offset);
                byte[] temp = new byte[partSize];
                fs.Position = offset;
                fs.Read(temp, 0, partSize);
                socketClient.Send(temp, temp.Length, SocketFlags.None);//将数据发送到指定的终结点
               // myControl.TraFransfersSize += partSize;
                if (offset + partSize >= fileLength) 
                    break;
                offset += partSize;                
            }
            //myChat.Rich_Out.AppendText("发送完成: " + fileName + "\n");  
            socketClient.Shutdown( SocketShutdown.Both);
            socketClient.Close();
           // myChat.RemoveFileInfoFromControl(fileName);
        }

接收端部分代码：
        public void Listener()   //监听 本地端口 5421
       {
           if (classTCPSocket == null)
               classTCPSocket = new ClassTCPSocket(5421);