C# 文件传输

Question

我现在想做一个Socket 服务器端与客户端，用来传输文件，求思路
服务器端读取本地文件，然后把数据流发送到客户端，客户端怎样才能把数据流转换成原始数据呢

Answer 1

TcpClient,TcpListener用来监听和传输
FileStream来读取和写入文件

Answer 2

如果想用socket ，那就只能通过字节流 ，也就是byte[]，因为socket只能支持这个类型的数据 。然后你可以通过转换数据类型来办到 。其实用socket的还是挺多的 ，很好找 。

Answer 3

byte[] -> stream -> filestream ->file?

Answer 4

部分代码
Dictionary<string, ConnectionClient> dictConn = new Dictionary<string, ConnectionClient>(); //选择要发送的文件
        private void btnChooseFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                txtFilePath.Text = ofd.FileName;
            }
        }        //发送文件
        private void btnSendFile_Click(object sender, EventArgs e)
        {
                //拿到下拉框中选中的客户端IPPORT
                string key = cboClient.Text;
                if (!string.IsNullOrEmpty(key))
                {
                    dictConn[key].SendFile(txtFilePath.Text.Trim());
                }
        }

Answer 5

http://www.cnblogs.com/fence/archive/2010/01/11/1644244.html

Answer 6

1.读出文件到字节数组中--这里编码
2.把字节数组发送出去，如6楼
3.将数据接入到字节数组
4.将字节数组存成文件--这里解码，（加码解码要统一，对应）
5.附部分代码，存文件。System.Windows.Forms.SaveFileDialog DialogSave = new System.Windows.Forms.SaveFileDialog();
DialogSave.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";
DialogSave.InitialDirectory = "c:";
if (DialogSave.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
byte[] outBytes = null;
outBytes = System.Text.Encoding.Default.GetBytes(TextBoxRecieve.Text);
string FileName = DialogSave.FileName;
//    My.Computer.FileSystem.WriteAllBytes(FileName, outBytes, false);
Stream fs = new FileStream(FileName, FileMode.Create, FileAccess.Write);
fs.Write(outBytes, 0, outBytes.Length);
fs.Flush();
fs.Close();
//   fs.Disppose()
Interaction.MsgBox("数据保存到 " + FileName);
}

Answer 7

说点原理吧，网络传输都是用二进制在传输。所以发送的时候必须以byte[]，然后接收到后，再转换成对应的数据，这就是所谓的网络传输协议
你可以看看C#里面所讲到的序列化，与反序列化,应该就可以进行实践了

Answer 8

//接收端代码
 void tcp_OnReceived(byte[] message)
        {
            try
            {
                char[] charData;
                byte[] bData;
                // solve(message);
                string datagramtext = "HX7070\n0001";
                string replyMessage = Encoding.Default.GetString(message);
              
                string str = replyMessage.Substring(11, 8);
                int oldcount = Convert.ToInt32(str,16) - 1;
                string rMessage = replyMessage.Substring(19);
                // string fileaddress=@"E:\TDDOWNLOAD\我爱你胜过你爱我1111.mp3";
                string fileaddress = @"F:\13.56M各扇区控制块111.txt";
                FileStream aFile = new FileStream(fileaddress, FileMode.Create,FileAccess.Write);
                
                datagramtext += tianchong(oldcount.ToString(), "0", 8, true);
                bData = Fun.GetPartBtye(message, 19, message.Length-19);
                aFile.Write(bData, 0, bData.Length);
                aFile.Flush();
                aFile.Close();
                //tcp.SendRequestMessage(datagramtext);
                this.AddInfo("reply message: " + replyMessage);
            }
            catch
            {
            }
        }//发送端代码
string filename = @"F:\13.56M各扇区控制块.txt";
                    FileStream filestream = File.Open(filename, FileMode.Open);
                    byte[] allbyte = new byte[filestream.Length];
                    filestream.Read(allbyte, 0, Convert.ToInt32(filestream.Length));
                    long FileLeng = filestream.Length / 400;//总包数
                    long FileYuLeng = filestream.Length % 400;//不足一包
                    if (FileYuLeng != 0)
                    {
                        FileLeng += 1;
                    }                    for (int i = oldcount; i < FileLeng; i++)
                    {
                        long len = filestream.Length - i * 400;
                        string datagramtext = "HX7070\n0001";
                        datagramtext += tianchong((FileLeng - i).ToString(), "0", 8, true);
                        if (Convert.ToInt32(filestream.Length - i * 400) < 400)
                        {
                            byte[] bData = Fun.GetPartBtye(allbyte, i * 400, Convert.ToInt32(filestream.Length - i * 400)); //new byte[Convert.ToInt32(filestream.Length - i * 400)];
                            datagramtext += BitConverter.ToString(bData).Replace("-", "");
                        }
                        else
                        {
                            byte[] bData = Fun.GetPartBtye(allbyte, i * 400, 400);
                            datagramtext += BitConverter.ToString(bData).Replace("-", "");
                        }
                        this.SendDatagram(datagramtext);//发送
                        //Thread.Sleep(100);
                    }
                    filestream.Flush();
                    filestream.Close();

Answer 9

Server(Client) -> Stream -> byte[] ->    SOCKET    ->byte[] -> Stream -> Client(Server) 

Answer 10

有必要传输 字符串类型XML岂不更好

Answer 11

接收时，要将接到的字节，再转回字符串格式，就对上了。
加上此条private List<byte> buffer = new List<byte>();
private void ShowRecieveData(byte[] inbytes)
{
System.Text.StringBuilder instrs_temp = new System.Text.StringBuilder();
buffer.AddRange(inbytes);
//缓存
instrs_temp.Append(System.Text.Encoding.Default.GetString(buffer.ToArray(), 0, buffer.Count));
}

Answer 12

 FtpWebRequest reqFTP;
FileStream outputStream = new FileStream(filePath, FileMode.OpenOrCreate);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.ContentOffset = outputStream.Length;//断点续传
                //21105512
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                
                int bufferSize = 20480;//
                int readCount;
                
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                sqlstr = "update downloading set DownState='1' where id=" + id;//把此文件的状态改为正在下载
                try
                {
                    access.DoSQL(SQLConn, sqlstr);
                }
                catch (Exception exx)
                {
                    Fun.MsgShow(exx.Message, false);
                }
                //sqlstr = "insert into downloading(uploadpath,bytecount,addtime,states)values('" + fileName + "',0,date(),'0')";
                //id =Convert.ToInt32( access.GetLastSQL(SQLConn, sqlstr));
                outputStream.Position = outputStream.Length;//断点续传
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                    writeCount += readCount;
                   
                }