通常我可以在这个或其他网站上找到asnwer,文档。但现在我无法理解...... 我有两个版本的TCP服务器代码,(NetworkSteam读取)。
使用ReadAsync:
public async Task StartWorkAsync(TcpClient Modem, CancellationToken ct)
{
using (Modem)
{
byte[] buf = new byte[1024];
var steam = Modem.GetStream();
while (!ct.IsCancellationRequested && !StopAllWorkFoClients.WaitOne(0))
{
var amountReadTask = steam.ReadAsync(buf, 0, buf.Length, ct);
var amountRead = await amountReadTask.ConfigureAwait(false);
if (amountReadTask.IsFaulted || amountReadTask.IsCanceled)
{
Console.WriteLine("Error:IsFaulted||IsCanceled");
break;
}
await WorkOnReceiveModemData(buf.Take(amountRead).ToArray()).ConfigureAwait(false);
}
}
}
使用BeginRead,EndRead:
byte[] buf = new byte[1024];
public void StartWork(TcpClient Modem)
{
var steam = Modem.GetStream();
var x = steam.BeginRead(buf, 0, buf.Length, new AsyncCallback(ReceiveDataAsync), (object)steam);
}
public void ReceiveDataAsync(IAsyncResult ar)
{
try
{
NetworkStream x = (NetworkStream)ar.AsyncState;//(((Tuple<object,object>)ar.AsyncState).Item1);
try
{
bytesread += x.EndRead(ar);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
var timeout = 0;
var bytesbefore = bytesread;
x.ReadTimeout = 50;
while (bytesread < _BYTESBUFFERCOUNT)
{
DateTime dt = DateTime.Now;
if (x.DataAvailable)
{
var ii = x.Read(bufzzzz, bytesread, bufzzzz.Length - bytesread);
bytesread += ii;
}
System.Threading.Thread.Sleep(10);
if (bytesread - bytesbefore > 0)
timeout = 0;
else
{
timeout += (int)(DateTime.Now - dt).TotalMilliseconds;
}
if (bytesread > 5)
if (timeout > _ACCUMULATETIMEOUT)
break;
if (bytesread <= 5)
if (timeout > _ACCUMULATETIMEOUT * 2)
break;
bytesbefore = bytesread;
}
WorkOnReceiveModemData(buf.Take(bytesread).ToArray());
x.BeginRead(buf, bytesread, buf.Length, new AsyncCallback(ReceiveDataAsync), (object)x);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
也许我犯了错误,但在第二版中它读了(右): 0x00 0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC
但是在第一个版本中它是:
读取:0x00 0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC 0x00 0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC
或:
读:0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC
读:0x00 0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC
读:0x00 0x10 0x3F 0xFF 0x00 0x00 0xFD 0xFC
我的客户是不同的GPRS调制解调器。我希望smb可以帮助我。
答案 0 :(得分:1)
对不起这是相同的工作,但ReadAsync在我看来更快,更清晰。我在其他代码中犯了错误,我每次都向GPRS调制解调器发送两次数据包,并且调制解调器将两个答案合二为一。
在初学者我必须使用不同的服务器,当我更改ReadAsync(BeginRead,EndRead)时,我看到同样的错误。并找到了它。