我正在使用TCP / IP通信，其中我的应用程序是客户端和服务器。我检查了NetworkStream和异步通信。当我调试代码时，我能够在不丢失单个字节的情况下获得整个数据，但是没有调试我错过了一些字节。在每次接收操作后放置Thread.Sleep(1)时会出现同样的问题。
string ServeripAddress = "192.168.1.200";
int PortNo = 8000;
Socket clientSocket = null;
byte[] breakBuffer;
DateTime starttime;
DateTime endtime;
Boolean readflag;
Boolean Firstflag;
Thread th = null;
byte[] readBuffer = new byte[1024];
public delegate void DisplayStatus();
public DisplayStatus StatusDelegate;
string StatusMsg = string.Empty;
int check = 0;
string datalogPath = Application.StartupPath + "\\Datalog\\";
string voicelogPath = Application.StartupPath + "\\Voicelog\\";
string voicemsgPath = Application.StartupPath + "\\VoiceMsg\\";
string status = string.Empty;
List<string> listFileNames = new List<string>();
int functionCode = 0;
Queue<byte[]> bufferQueue = new Queue<byte[]>();
byte[] finalbytes = new byte[1024];
int numberOfBytesRead = 0;
int lastPktlength = 0;
int RemainLength = 0;
bool FileDownloaded = false;
long DownloadedLength = 0;
long FileSize = 0;
ArrayList BufList = new ArrayList();
Boolean ReceiveBreaked = false;
string fromDt = string.Empty;
Boolean startedReceive = false;
Thread thdUDPServer = null;
AsyncCallback asyncCall = null;
public Boolean Connect(string ServeripAddress, int port)
{
Boolean connect = false;
try
{
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Connect the socket to the remote endpoint.
clientSocket.Connect(ServeripAddress, PortNo);
if (clientSocket.Connected)
{
connect = true;
}
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
return connect;
}
public ArrayList SendRequest(byte[] command, string frmD, ref string currentStatus, ref List<string> listFiles, int funCode)
{
try
{
Firstflag = true;
fromDt = frmD;
clientSocket.Send(command, command.Length, 0);
functionCode = funCode;
//Asynchronous receiving
SetupRecieveCallback(clientSocket);
readflag = true;
BufList = new ArrayList();
if (status == "Completed" && (functionCode != 1 && functionCode != 4 && functionCode != 7))
{
GenerateFiles(fromDt, ref BufList);
//thdUDPServer = new Thread(new ThreadStart(() => GenerateFiles(fromDt, ref BufList)));
//thdUDPServer.Start();
status = "";
}
currentStatus = status;
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
return BufList;
}
private void GenerateFiles(string fromDt, ref ArrayList BufList)
{
if (BufList.Count > 0 && (functionCode == 2 || functionCode == 3))
{
CreateWavFile(BufList, fromDt, "Voicelog");
}
else if (BufList.Count > 0 && (functionCode == 5))
{
CreateWavFile(BufList, fromDt, "VoiceMsg");
}
else if (BufList.Count > 0 && (functionCode == 8 || functionCode == 9))
{
CreateWavFile(BufList, fromDt, "Datalog");
}
else if (BufList.Count > 0 && functionCode == 3)
{
CreateAllDatesWavFile(BufList, listFileNames, "Voicelog");
}
else if (BufList.Count > 0 && functionCode == 6)
{
CreateAllDatesWavFile(BufList, listFileNames, "VoiceMsg");
}
// thdUDPServer.Abort();
}
private void SetupRecieveCallback(Socket soc)
{
try
{
readBuffer = new byte[soc.ReceiveBufferSize];
asyncCall = new AsyncCallback(OnEthernetRecievedData);
soc.BeginReceive(readBuffer, 0, readBuffer.Length, SocketFlags.None, asyncCall, soc);
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
}
public void OnEthernetRecievedData(IAsyncResult ar)
{
Socket sock = (Socket)ar.AsyncState;
try
{
Thread.Sleep(1);
numberOfBytesRead = sock.EndReceive(ar);
Array.Resize(ref readBuffer, (int)numberOfBytesRead);
if (numberOfBytesRead > 0)
{
if (functionCode == 2 || functionCode == 5 || functionCode == 9)
{
lastPktlength = 0;
DownloadFiles(readBuffer, ref status, numberOfBytesRead, ref FileDownloaded, ref DownloadedLength, ref FileSize, ref BufList);
if (status == "Fail")
{
// return BufList;
return;
}
else if (status == "Completed")
{
startedReceive = false;
thdUDPServer = new Thread(new ThreadStart(() => GenerateFiles(fromDt, ref BufList)));
thdUDPServer.Start();
return;
}
}
}
//calling receive method
SetupRecieveCallback(sock);
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
}
private Boolean DownloadFiles(byte[] readBuffer, ref string status, int numberOfBytesRead, ref bool FileDownloaded, ref long DownloadedLength, ref long FileSize, ref ArrayList BufList)
{
Boolean completedStatus = false;
int lastPktlength = 0;
Boolean FileBreak = false;
status = "";
try
{
if (readBuffer[lastPktlength] == 76 && readBuffer[lastPktlength + 1] == 67 && readBuffer[lastPktlength + 2] == 0
&& readBuffer[lastPktlength + 3] == 16 && readBuffer[lastPktlength + 4] == 50 && readBuffer[lastPktlength + 5] == 48)
{
while (numberOfBytesRead > lastPktlength)
{
NewMethod(ref status, readBuffer, numberOfBytesRead, ref lastPktlength, ref FileDownloaded, ref FileSize, ref finalbytes, BufList, ref DownloadedLength);
}
}
else
{
if (FileSize - DownloadedLength >= numberOfBytesRead)
{
Array.Copy(readBuffer, 0, finalbytes, DownloadedLength, numberOfBytesRead);
DownloadedLength = DownloadedLength + numberOfBytesRead;
}
else
{
Array.Copy(readBuffer, 0, finalbytes, DownloadedLength, FileSize - DownloadedLength);
lastPktlength = (int)(FileSize - DownloadedLength);
Logger.Logger.Messages(FileSize.ToString());
BufList.Add(finalbytes);
while (numberOfBytesRead > lastPktlength)
{
NewMethod(ref status, readBuffer, numberOfBytesRead, ref lastPktlength, ref FileDownloaded, ref FileSize, ref finalbytes, BufList, ref DownloadedLength);
}
}
}
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
status = "Fail";
//return BufList;
}
return completedStatus;
}
private static void NewMethod(ref string status, byte[] readBuffer, int numberOfBytesRead, ref int lastPktlength, ref bool FileDownloaded, ref long FileSize, ref byte[] finalbytes, ArrayList BufList, ref long DownloadedLength)
{
try
{
int checkLength = lastPktlength + 16;
for (int i = lastPktlength; i < readBuffer.Length; i++)
{
if ((readBuffer[lastPktlength] == 76 && readBuffer[lastPktlength + 1] == 67 && readBuffer[lastPktlength + 2] == 0
&& readBuffer[lastPktlength + 3] == 16 && readBuffer[lastPktlength + 4] == 50 && readBuffer[lastPktlength + 5] == 48))
{
lastPktlength = i;
break;
}
}
if ((readBuffer[lastPktlength] == 76 && readBuffer[lastPktlength + 1] == 67 && readBuffer[lastPktlength + 2] == 0
&& readBuffer[lastPktlength + 3] == 16 && readBuffer[lastPktlength + 4] == 50 && readBuffer[lastPktlength + 5] == 48)
&& (checkLength <= numberOfBytesRead)
)
{
FileSize = 16 + (uint)((readBuffer[lastPktlength + 12] << 24) + (readBuffer[lastPktlength + 13] << 16) + (readBuffer[lastPktlength + 14] << 8) + (readBuffer[lastPktlength + 15]));
string ffName = Encoding.ASCII.GetString(readBuffer, lastPktlength + 6, 6);
finalbytes = new byte[FileSize];
if ((numberOfBytesRead - lastPktlength) >= finalbytes.Length)
{
if (FileSize > (numberOfBytesRead - lastPktlength))
{
Array.Copy(readBuffer, 0, finalbytes, (lastPktlength), FileSize - lastPktlength);
}
else
{
Array.Copy(readBuffer, lastPktlength, finalbytes, 0, FileSize);
}
lastPktlength = lastPktlength + (int)FileSize;
FileDownloaded = true;
}
else
{
Array.Copy(readBuffer, lastPktlength, finalbytes, 0, numberOfBytesRead - lastPktlength);
DownloadedLength = numberOfBytesRead - lastPktlength;
lastPktlength = lastPktlength + (numberOfBytesRead - lastPktlength);
}
if (FileDownloaded)
{
BufList.Add(finalbytes);
Logger.Logger.Messages(ffName + " : " + FileSize.ToString());
FileDownloaded = false;
}
}
else if (readBuffer[lastPktlength] == 76 && readBuffer[lastPktlength + 1] == 67 && readBuffer[lastPktlength + 2] == 0
&& readBuffer[lastPktlength + 3] == 6 && readBuffer[lastPktlength + 4] == 70 && readBuffer[lastPktlength + 5] == 48)
{
status = "Fail";
// return BufList;
}
else if (readBuffer[lastPktlength] == 76 && readBuffer[lastPktlength + 1] == 67 && readBuffer[lastPktlength + 2] == 0
&& readBuffer[lastPktlength + 3] == 6 && readBuffer[lastPktlength + 4] == 69 && readBuffer[lastPktlength + 5] == 48)
{
// BufList.Add(finalbytes);
Logger.Logger.Messages("End time : " + DateTime.Now);
status = "Completed";
numberOfBytesRead = 0;
lastPktlength = lastPktlength + 6;
}
else //if ((numberOfBytesRead - lastPktlength) < 16)
{
}
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
}
public void CreateAllDatesWavFile(ArrayList listBuffer, List<string> listFileNames, string fileType)
{
try
{
for (int i = 0; i < listBuffer.Count; i++)
{
string wavPath = string.Empty;
string folderName = listFileNames[i].Substring(0, 6).ToString();
string fileName = listFileNames[i].Substring(6, 6).ToString();
if (fileType == "Voicelog")
{
if (!Directory.Exists(voicelogPath + folderName))
{
Directory.CreateDirectory(voicelogPath + folderName);
}
wavPath = voicelogPath + folderName + "\\" + fileName + ".Wav";
// wavPath = voicelogPath + datePath + "\\" + listFileNames[i].ToString() + ".Mp4";
}
else if (fileType == "VoiceMsg")
{
if (!Directory.Exists(voicemsgPath + folderName))
{
Directory.CreateDirectory(voicemsgPath + folderName);
}
wavPath = voicemsgPath + folderName + "\\" + fileName + ".Wav";
}
FileStream stream;
if (!File.Exists(wavPath))
{
stream = new FileStream(wavPath, FileMode.Create, FileAccess.ReadWrite);
}
else
{
stream = new FileStream(wavPath, FileMode.Open, FileAccess.ReadWrite);
}
stream.Close();
File.WriteAllBytes(wavPath, (byte[])listBuffer[i]);
}
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
}
public void CreateWavFile(ArrayList listBuffer, string fromDate, string fileType)
{
try
{
for (int i = 0; i < listBuffer.Count; i++)
{
string wavPath = string.Empty;
string datePath = fromDate;
string fileName = Encoding.ASCII.GetString((byte[])listBuffer[i], 6, 6);
if (fileType == "Voicelog")
{
if (!Directory.Exists(voicelogPath + datePath))
{
Directory.CreateDirectory(voicelogPath + datePath);
}
wavPath = voicelogPath + datePath + "\\" + fileName + ".Wav";
// wavPath = voicelogPath + datePath + "\\" + listFileNames[i].ToString() + ".Mp4";
}
else if (fileType == "VoiceMsg")
{
if (!Directory.Exists(voicemsgPath + datePath))
{
Directory.CreateDirectory(voicemsgPath + datePath);
}
wavPath = voicemsgPath + datePath + "\\" + fileName + ".Wav";
}
else if (fileType == "Datalog")
{
wavPath = Application.StartupPath + "\\Datalog\\" + fileName + ".txt";
}
FileStream stream;
if (!File.Exists(wavPath))
{
stream = new FileStream(wavPath, FileMode.Create, FileAccess.ReadWrite);
}
else
{
stream = new FileStream(wavPath, FileMode.Open, FileAccess.ReadWrite);
}
stream.Close();
byte[] startOffile = new byte[16];
Array.Copy((byte[])listBuffer[i], 0, startOffile, 0, 16);
long sizef = (uint)((startOffile[12] << 24) + (startOffile[13] << 16) + (startOffile[14] << 8) + (startOffile[15]));
byte[] fileArray = new byte[sizef];
Array.Copy((byte[])listBuffer[i], 16, fileArray, 0, sizef);
File.WriteAllBytes(wavPath, fileArray);
}
}
catch (Exception ex)
{
Logger.Logger.WriteLog(ex);
}
}
请帮我解决这个问题。
答案 0 :(得分：0)
网络问题的主要原因包括在应用程序体系结构和其中的线程管理中。因此，如果您在应用程序空闲时（即没有取消标记）丢失信息，而您在擅长debagging模式时，最好的原因可能是使用断点。在任何debagging工具中，如果一个断点被一个线程击中，那么所有线程都会被冻结，并且当你开始执行时，进程恢复。有时，这会自动解决一些同步问题，因为所有线程都有时间冻结并启动。但是，另一方面，问题仍然存在于实际运行中。随着编程逻辑变得越来越大，这个问题会越来越广泛。
可能的补救措施
确保您只使用单线程进行编写，并使用单线程进行阅读。甚至可以在单线程上进行读写。
确保在每次成功写入后使用 flush stream 方法。
如果问题仍未解决，请显示代码以获得更好的建议和理解。