private bool WaitForPrintingAcknowledge(ref string stringReadFrom)
{
try
{
bool returnValue = false;
this.inkJetNetworkStream.ReadTimeout = 300; //Default = -1;
stringReadFrom = GlobalNetSockets.ReadFromStream(inkJetTcpClient, inkJetNetworkStream);
if (stringReadFrom == GlobalVariables.charPrintingACK.ToString()) //OK State
{
returnValue = true; // GlobalVariables.DominoProductCounter[(int)this.DominoPrinterNameID]++;
}
else// != : Need to check some other condition
{
int countPrintingACK = GlobalStaticFunction.CountStringOccurrences(stringReadFrom, GlobalVariables.charPrintingACK.ToString());
if (countPrintingACK == 1) //OK: but in case of receive only one PrintingACK, following by something: Ignore. Later: Maybe ADD SOME CODE to SHOW on screen what stringReadFrom is
{
this.MainStatus = "NMVN: Some extra thing received: " + stringReadFrom;
returnValue = true; // GlobalVariables.DominoProductCounter[(int)this.DominoPrinterNameID]++;
}
else if (countPrintingACK > 1)
{
this.MainStatus = "NMVN: Receive more than one printing acknowledge, a message may printed more than one times";
returnValue = true; // GlobalVariables.DominoProductCounter[(int)this.DominoPrinterNameID] = GlobalVariables.DominoProductCounter[(int)this.DominoPrinterNameID] + countPrintingACK;
}
else // countPrintingACK < 1 : Fail
{
this.MainStatus = "NMVN: Random received: " + stringReadFrom;
returnValue = false;
}
}
this.inkJetNetworkStream.ReadTimeout = -1; //Default = -1
return(returnValue);
}
catch (Exception exception)
{
//Ignore when timeout
if (exception.Message != "Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.")
{
this.MainStatus = exception.Message;
}
this.inkJetNetworkStream.ReadTimeout = -1; //Default = -1
return(false);
}
}
private bool ReadFromStream(ref string stringReadFrom, bool waitForACK, string commandCode, long commandLength)
{
try
{
stringReadFrom = GlobalNetSockets.ReadFromStream(inkJetTcpClient, inkJetNetworkStream);
if (waitForACK)
{
if (stringReadFrom.ElementAt(0) == GlobalVariables.charACK)
{
return(true);
}
else
{
if (stringReadFrom.ElementAt(0) == GlobalVariables.charNACK && stringReadFrom.Length >= 4)
{
lastNACKCode = stringReadFrom.Substring(1, 3); //[0]: NACK + [1][2][3]: 3 Digit --- Error Code
}
return(false);
}
}
else if (commandLength == 0 || stringReadFrom.Length >= commandLength)
{ //stringReadFrom(0): ESC;----stringReadFrom(1): COMMAND;----stringReadFrom(2->N): PARAMETER;----stringReadFrom(stringReadFrom.Length): EOT
if (stringReadFrom.ElementAt(0) == GlobalVariables.charESC && stringReadFrom.ElementAt(1) == commandCode.ElementAt(0) && stringReadFrom.ElementAt(stringReadFrom.Length - 1) == GlobalVariables.charEOT)
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
catch (Exception exception)
{
this.MainStatus = exception.Message; // ToString();
return(false);
}
}
private bool WaitForBarcode(ref string stringReadFrom)
{
try
{
this.barcodeNetworkStream.ReadTimeout = 120; //Default = -1;
stringReadFrom = GlobalNetSockets.ReadFromStream(barcodeTcpClient, barcodeNetworkStream).Trim();
this.barcodeNetworkStream.ReadTimeout = -1; //Default = -1
return(stringReadFrom != "");
}
catch (Exception exception)
{
this.barcodeNetworkStream.ReadTimeout = -1; //Default = -1
//Ignore when timeout
if (exception.Message == "Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.")
{
stringReadFrom = "";
return(false);
}
else
{
throw exception;
}
////this.LedGreenOn = this.barcodeTcpClient.Connected;//this.LedAmberOn = readyToPrint;
////this.LedRedOn = !this.barcodeTcpClient.Connected;
////this.NotifyPropertyChanged("LedStatus");
////this.MainStatus = this.LedGreenOn ? (this.onPrinting ? "Scanning ...." : "Ready to scan") : exception.Message;
}
}