private void PrintFormat(object sender, DoWorkEventArgs e)
{
Dictionary <int, string> formatVars = GetFormatVariables();
try {
OpenConnection();
ZebraPrinter printer = ZebraPrinterFactory.GetInstance(printerConnection);
string statusMessage = GetPrinterStatus(printer.GetCurrentStatus());
if (statusMessage != null)
{
errorMessage = "Printer Error: " + statusMessage + ". Please check your printer and try again.";
}
else
{
if (!lastFormatOpenedSource.Equals(FORMAT_SOURCE_PRINTER))
{
printerConnection.Write(Encoding.UTF8.GetBytes(lastFormatOpenedContents));
}
printer.PrintStoredFormat(lastFormatOpened, formatVars, "UTF-8");
statusMessage = GetPrinterStatus(printer.GetCurrentStatus());
if (statusMessage != null)
{
errorMessage = "Printer Error after Printing: " + statusMessage + ". Please check your printer.";
}
}
} catch (ConnectionException error) {
errorMessage = "Connection Error: " + error.Message;
} finally {
CloseConnection();
}
}
/* Returns true if the printer is ready to print, else false
* Called before printing
*/
private static string CheckPrinterStatus(Connection conn)
{
ZebraPrinter printer = ZebraPrinterFactory.GetLinkOsPrinter(conn);
if (printer == null)
{
printer = ZebraPrinterFactory.GetInstance(PrinterLanguage.ZPL, conn);
}
PrinterStatus printerStatus = printer.GetCurrentStatus();
if (printerStatus.isReadyToPrint)
{
return("true");
}
else if (printerStatus.isPaused)
{
return("Error: Printer is paused");
}
else if (printerStatus.isHeadOpen)
{
return("Error: Printer head is open");
}
else if (printerStatus.isPaperOut)
{
return("Error: Paper is out");
}
return("Error");
}
private void statusUpdateThread()
{
try {
ZebraPrinterConnection connection = getConnection();
ZebraPrinter printer = ZebraPrinterFactory.GetInstance(connection);
String statusMessages;
while (getConnection() != null && connection.IsConnected())
{
PrinterStatus printerStatus = printer.GetCurrentStatus();
PrinterStatusMessages messages = new PrinterStatusMessages(printerStatus);
String[] messagesArray = messages.GetStatusMessage();
statusMessages = "Ready to Print: " + Convert.ToString(printerStatus.IsReadyToPrint);
statusMessages += "\r\nLabels in Batch: " + Convert.ToString(printerStatus.LabelsRemainingInBatch);
statusMessages += "\r\nLabels in Buffer: " + Convert.ToString(printerStatus.NumberOfFormatsInReceiveBuffer) + "\r\n\r\n";
foreach (String message in messagesArray)
{
statusMessages += message + "\r\n";
}
Invoke(new statusEventHandler(updateStatusMessage), statusMessages);
Thread.Sleep(4000);
}
} catch (ZebraException) {
disconnected();
updateGuiFromWorkerThread("COMM Error! Disconnected", Color.Red);
}
}
public async Task <bool> CetakZebraAsync(PrintTicket printData, string printerName)
{
var parser = new FileIniDataParser();
IniData iniData = parser.ReadFile("Configuration.ini");
string serverUrl = iniData["server"]["url"];
string serverApi = iniData["server"]["api"];
Connection conn = null;
try
{
conn = new DriverPrinterConnection(printerName);
conn.Open();
ZebraPrinter zebraPrinter = ZebraPrinterFactory.GetInstance(conn);
PrinterStatus printStatus = zebraPrinter.GetCurrentStatus();
if (printStatus.isReadyToPrint)
{
foreach (TicketData data in printData.tickets)
{
byte[] buffer1 = ASCIIEncoding.ASCII.GetBytes(data.ticket);
conn.SendAndWaitForResponse(buffer1, 1000, 1000, null);
await UpdateStatus(data.id, serverApi, serverUrl, "printed");
}
conn.Close();
return(true);
}
else
{
MessageBox.Show("Printer is not ready!");
foreach (TicketData data in printData.tickets)
{
await UpdateStatus(data.id, serverApi, serverUrl, "draft");
}
return(false);
}
}
catch (ConnectionException e)
{
MessageBox.Show(e.Message);
foreach (TicketData data in printData.tickets)
{
await UpdateStatus(data.id, serverApi, serverUrl, "draft");
}
return(false);
}
finally
{
try
{
if (conn != null)
{
conn.Close();
}
}
catch (ConnectionException e)
{
MessageBox.Show(e.Message);
}
}
}
//链接打印机
public static string LinkPrinter(string printerName, int port)
{
try
{
string ip = GetRegistryData(printerName + "\\DsSpooler", "portName");
if (ip == "" || ip.Split(new char[] { '.' }).Length != 4)
{
throw new ConnectionException("没找到IP");
}
foreach (string s in ip.Split(new char[] { '.' }))
{
int.Parse(s);
}
Ping pingSender = new Ping();
PingReply reply = pingSender.Send(ip, 1);;
if (reply.Status != IPStatus.Success)
{
throw new ConnectionException("链接失败！");
}
/*Ping pingSender = new Ping();
* Thread thread = new Thread(new ThreadStart()));
* thread.Start();
* PingReply reply = null;
* reply = pingSender.Send(ip, 1);//第一个参数为ip地址，第二个参数为ping的时间
*
* Func<string, int, PingReply> func = new Func<string, int, PingReply>(Printer.PingIP);
* reply = func(ip, 1);
*
* if (reply.Status != IPStatus.Success)
* throw new ConnectionException("链接失败！");*/
TcpConnection connection = new TcpConnection(ip, port);
connection.Open();
printerHTTP = ZebraPrinterFactory.GetInstance(connection);
linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(printerHTTP);
printerStatus = printerHTTP.GetCurrentStatus();
}
catch (ConnectionException e)
{
printerHTTP = null;
FileTools.WriteLineFile(FileTools.exceptionFilePath, DateTime.Now.ToString() + " " + printerName + e.Message);
return(printerName + e.Message);
}
catch (FormatException e)
{
printerHTTP = null;
FileTools.WriteLineFile(FileTools.exceptionFilePath, DateTime.Now.ToString() + " " + printerName + "IP地址不正确！");
return(printerName + "IP地址不正确！");
}
return("");
}
public String[] ReadMagCard(int timeout)
{
bool error = true;
try
{
ThePrinterConn.Open();
printer = ZebraPrinterFactory.GetInstance(ThePrinterConn);
mcr = printer.GetMagCardReader();
PrinterStatus printerStatus = printer.GetCurrentStatus();
bool ready = printerStatus.IsReadyToPrint;
if (ready == false)
{
return(null);
}
//MagCardReader mcr = printer.GetMagCardReader();
if (mcr != null)
{
//read
String[] tracks = mcr.Read(timeout);
if (tracks[0] != "" || tracks[1] != "" || tracks[2] != "")
{
ready = printerStatus.IsReadyToPrint;
if (ready)
{
String header = "! 0 200 200 0 1";
ThePrinterConn.Write(Encoding.UTF8.GetBytes(header + "\r\nBEEP 1\r\nPRINT\r\n"));
}
}
//SystemSounds.Beep.Play();
return(tracks);
}
//thePrinterConn.Close();
error = false;
}
catch (Exception e)
{
Logger.Logger.Log(e);
error = true;
}
if (error)
{
return(null);
}
else
{
return(new String[3] {
"", "", ""
});
}
}
public static bool CheckStatusAfter(ZebraPrinter printer)
{
PrinterStatus printerStatus = null;
try
{
VerifyConnection(printer);
printerStatus = printer.GetCurrentStatus();
while ((printerStatus.numberOfFormatsInReceiveBuffer > 0) && (printerStatus.isReadyToPrint))
{
Thread.Sleep(500);
printerStatus = printer.GetCurrentStatus();
}
}
catch (ConnectionException e)
{
throw new ConnectionException($"Error getting status from printer: {e.Message}");
}
if (printerStatus.isReadyToPrint)
{
Console.WriteLine($"Ready To Print");
return(true);
}
else if (printerStatus.isPaused)
{
throw new NotSupportedException($"Cannot Print because the printer is paused.");
}
else if (printerStatus.isHeadOpen)
{
throw new NotSupportedException($"Cannot Print because the printer head is open.");
}
else if (printerStatus.isPaperOut)
{
throw new NotSupportedException($"Cannot Print because the paper is out.");
}
else
{
throw new NotSupportedException($"Cannot Print.");
}
return(false);
}
private async void GetPrinterStatusButton_Clicked(object sender, EventArgs eventArgs)
{
AvailableChannelsLabel.Text = "";
PrinterStatusLabel.Text = "Retrieving printer status...";
SetInputEnabled(false);
StatusConnection statusConnection = null;
Connection rawConnection = null;
try {
statusConnection = CreateStatusConnection();
if (statusConnection == null)
{
return;
}
if (GetSelectedConnectionType() == ConnectionType.Bluetooth)
{
try {
// Over Bluetooth, the printer only broadcasts the status connection if a valid raw connection is open
rawConnection = DependencyService.Get <IConnectionManager>().GetBluetoothConnection(AddressEntry.Text);
} catch (NotImplementedException) {
throw new NotImplementedException("Bluetooth connection not supported on this platform");
}
await Task.Factory.StartNew(() => {
rawConnection.Open();
});
await Task.Delay(3000); // Give the printer some time to start the status connection
}
await Task.Factory.StartNew(() => {
statusConnection.Open();
ZebraPrinter printer = ZebraPrinterFactory.GetLinkOsPrinter(statusConnection);
PrinterStatus printerStatus = printer.GetCurrentStatus();
Device.BeginInvokeOnMainThread(() => {
UpdateResult(printerStatus);
});
});
} catch (Exception e) {
PrinterStatusLabel.Text = $"Error: {e.Message}";
await DisplayAlert("Error", e.Message, "OK");
} finally {
try {
statusConnection?.Close();
rawConnection?.Close();
} catch (ConnectionException) { }
SetInputEnabled(true);
}
}
private bool CheckPrintingStatus(ZebraPrinter printer)
{
PrinterStatus printerStatus = null;
try
{
printerStatus = printer.GetCurrentStatus();
while (printerStatus.numberOfFormatsInReceiveBuffer > 0 && printerStatus.isReadyToPrint)
{
Thread.Sleep(100);
printerStatus = printer.GetCurrentStatus();
}
}
catch (ConnectionException e)
{
Debug.WriteLine("Connection Exception: " + e.ToString());
}
return(printerStatus.isReadyToPrint);
}
/* Should be called during and after printing to check printer status */
private bool PostPrintCheckPrinterStatus(Connection conn)
{
ZebraPrinter printer = ZebraPrinterFactory.GetLinkOsPrinter(conn, PrinterLanguage.ZPL);
if (printer == null)
{
printer = ZebraPrinterFactory.GetInstance(PrinterLanguage.ZPL, conn);
}
PrinterStatus printerStatus = printer.GetCurrentStatus();
// loop while printing until print is complete or there is an error
while ((printerStatus.numberOfFormatsInReceiveBuffer > 0) && (printerStatus.isReadyToPrint))
{
Thread.Sleep(500);
printerStatus = printer.GetCurrentStatus();
}
if (printerStatus.isReadyToPrint)
{
Debug.WriteLine("Printer Status: Ready to Print");
return(true);
}
else if (printerStatus.isPaused)
{
Debug.WriteLine("Printer Status: Cannot printer - printer is paused");
}
else if (printerStatus.isHeadOpen)
{
Debug.WriteLine("Printer Status: Cannot print - head is open");
}
else if (printerStatus.isPaperOut)
{
Debug.WriteLine("Printer Status: Cannot print - paper is out");
}
else
{
Debug.WriteLine("Printer Status: Cannot print");
}
return(false);
}
/*
* Check if the printer is ready
*/
private bool PrinterIsReady()
{
bool ready;
try
{
ready = printer != null && printer.GetCurrentStatus().isReadyToPrint;
}catch (Exception)
{
ready = false;
}
return(ready);
}
public bool Print()
{
bool error = true;
try
{
// Open the connection - physical connection is established here.
ThePrinterConn.Open();
printer = ZebraPrinterFactory.GetInstance(ThePrinterConn);
PrinterStatus printerStatus = printer.GetCurrentStatus();
bool ready = printerStatus.IsReadyToPrint;
if (ready == false)
{
return(error);
}
//stvaranje oblika za slanje na printer
String output = "! 0 200 200" + " " + (lastYPos + 100).ToString() + " " + "1\r\n";
//output += "IN-MILLIMETERS\r\n";
foreach (String s in buffer)
{
output += s + "\r\n";
}
output += "PRINT\r\n";
// Send the data to the printer as a byte array.
ThePrinterConn.Write(Encoding.UTF8.GetBytes(output));
//thePrinterConn.Close();
error = false;
}
catch (Exception e)
{
Logger.Logger.Log(e);
error = true;
}
finally
{
//brisi buffer
buffer.Clear();
//na kraju, baci gresku ako nije izvrseno do kraja...
}
return(error);
}
public static bool CheckStatus(ZebraPrinter printer)
{
PrinterStatus printerStatus = null;
try
{
VerifyConnection(printer);
printerStatus = printer.GetCurrentStatus();
}
catch (ConnectionException e)
{
throw new NotSupportedException($"Error getting status from printer: {e.Message}");
}
if (null == printerStatus)
{
throw new NotSupportedException($"Unable to get status.");
}
else if (printerStatus.isReadyToPrint)
{
Console.WriteLine($"Ready To Print");
return(true);
}
else if (printerStatus.isPaused)
{
throw new NotSupportedException($"Cannot Print because the printer is paused.");
}
else if (printerStatus.isHeadOpen)
{
throw new NotSupportedException($"Cannot Print because the printer head is open.");
}
else if (printerStatus.isPaperOut)
{
throw new NotSupportedException($"Cannot Print because the paper is out.");
}
else
{
throw new NotSupportedException($"Cannot Print.");
}
return(false);
}
public void Beep(int lenght)
{
try
{
printer = ZebraPrinterFactory.GetInstance(ThePrinterConn);
PrinterStatus printerStatus = printer.GetCurrentStatus();
bool ready = printerStatus.IsReadyToPrint;
if (ready)
{
String header = "! 0 200 200 0 1";
ThePrinterConn.Write(Encoding.UTF8.GetBytes(header + "\r\nBEEP " + lenght.ToString() + "\r\nPRINT\r\n"));
}
}
catch (Exception e)
{
Logger.Logger.Log(e);
return;
}
}
public PrinterStatus getPrinterStatus(rho.PrinterZebraImpl.PrinterZebra.EPrinterConnectionType connType, string address, Int32 port)
{
Logger.Write("MainWindow.getPrinterStatus call, address=" + address + " port=" + port.ToString());
PrinterStatus status = null;
ZebraPrinterConnection connection = null;
ZebraPrinter printer = null;
if (connType == rho.PrinterZebraImpl.PrinterZebra.EPrinterConnectionType.eTCP)
{
connection = new TcpPrinterConnection(address, port);
}
else if (connType == rho.PrinterZebraImpl.PrinterZebra.EPrinterConnectionType.eBluetooth)
{
connection = new BluetoothPrinterConnection(address);
}
else if (connType == rho.PrinterZebraImpl.PrinterZebra.EPrinterConnectionType.eUSB)
{
connection = new UsbPrinterConnection(address);
}
else
{
Logger.Write("MainWindow.getPrinterStatus undifined connection type");
return(null);
}
connection.Open();
if (connection.IsConnected())
{
printer = ZebraPrinterFactory.GetInstance(PrinterLanguage.ZPL, connection);
status = printer.GetCurrentStatus();
}
connection.Close();
Logger.Write("MainWindow.getPrinterStatus call finished");
return(status);
}
private string GetPrinterStatus(ZebraPrinter printer)
{
try
{
PrinterStatus printerStatus = printer.GetCurrentStatus();
if (printerStatus.isReadyToPrint)
{
return(Status.Ready);
}
else if (printerStatus.isPaused)
{
return(Status.Paused);
}
else if (printerStatus.isHeadOpen)
{
return(Status.HeadOpen);
}
else if (printerStatus.isPaperOut)
{
return(Status.MediaOut);
}
else if (printerStatus.isRibbonOut)
{
return(Status.RibbonOut);
}
else
{
return(Status.CannotPrint);
}
}
catch (ConnectionException e)
{
return(e.ToString());
}
catch (ZebraPrinterLanguageUnknownException e)
{
return(e.ToString());
}
}
public bool KeepAlive()
{
bool error = true;
try
{
// Open the connection - physical connection is established here.
ThePrinterConn.Open();
printer = ZebraPrinterFactory.GetInstance(ThePrinterConn);
PrinterStatus printerStatus = printer.GetCurrentStatus();
bool ready = printerStatus.IsReadyToPrint;
if (ready == false)
{
return(error);
}
//stvaranje oblika za slanje na printer
String output = "! 0 200 200 100 1\r\n";
output += "PRINT\r\n";
// Send the data to the printer as a byte array.
ThePrinterConn.Write(Encoding.UTF8.GetBytes(output));
//thePrinterConn.Close();
error = false;
}
catch (Exception e)
{
Logger.Logger.Log(e);
error = true;
}
finally
{
//na kraju, baci gresku ako nije izvrseno do kraja...
}
return(error);
}
private async void CheckPrinterStatusButton_Clicked(object sender, EventArgs eventArgs)
{
SetInputEnabled(false);
PrinterStatusLabel.Text = "Checking printer status...";
Connection connection = null;
try {
await Task.Factory.StartNew(() => {
connection = CreateConnection();
connection.Open();
ZebraPrinter printer = ZebraPrinterFactory.GetInstance(connection);
ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(printer);
PrinterStatus printerStatus = linkOsPrinter?.GetCurrentStatus() ?? printer.GetCurrentStatus();
Device.BeginInvokeOnMainThread(() => {
PrinterStatusLabel.Text = BuildPrinterStatusString(printerStatus);
});
});
} catch (Exception e) {
PrinterStatusLabel.Text = $"Error: {e.Message}";
await DisplayAlert("Error", e.Message, "OK");
} finally {
try {
connection?.Close();
} catch (ConnectionException) { }
SetInputEnabled(true);
}
}
public async Task PrintAsync(DiscoveredPrinter printer, string message)
{
Connection connection = null;
bool linePrintEnabled = false;
try
{
await Task.Factory.StartNew(() =>
{
connection = ConnectionCreator.Create(printer);
connection.Open();
string originalPrinterLanguage = SGD.GET(DeviceLanguagesSgd, connection);
linePrintEnabled = "line_print".Equals(originalPrinterLanguage, StringComparison.OrdinalIgnoreCase);
if (linePrintEnabled)
{
SGD.SET(DeviceLanguagesSgd, "zpl", connection);
}
ZebraPrinter zebraPrinter = ZebraPrinterFactory.GetInstance(connection);
ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(zebraPrinter);
string errorMessage = GetPrinterStatusErrorMessage(zebraPrinter.GetCurrentStatus());
if (errorMessage != null)
{
throw new PrinterNotReadyException($"{errorMessage}. Please check your printer and try again.");
}
else
{
connection.Write(Encoding.UTF8.GetBytes(message));
}
});
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
}
catch (PrinterNotReadyException e)
{
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
throw new Exception(e.Message);
}
catch (Exception e)
{
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
throw new Exception(e.Message);
}
finally
{
await Task.Factory.StartNew(() =>
{
try
{
connection?.Close();
}
catch (ConnectionException) { }
});
}
}
/// <summary>
/// 获取打印机状态
/// </summary>
/// <returns></returns>
public PrinterStatus GetPrinterStatus()
{
lock (connectionHelper)
{
connection = null;
}
lock (printerHelper)
{
printer = null;
}
PrinterStatus printerStatus = null;
if (TryOpenPrinterConnection())
{
printer = GetPrinter();
if (printer != null)
{
try
{
ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(printer);
printerStatus = (linkOsPrinter != null) ? linkOsPrinter.GetCurrentStatus() : printer.GetCurrentStatus();
}
catch (Exception ex)
{
myEventLog.LogError("获取打印机状态出错！", ex);
}
finally
{
}
}
}
return(printerStatus);
}
private async void PrintButton_Clicked(object sender, EventArgs eventArgs)
{
await Task.Factory.StartNew(() => {
viewModel.IsSendingPrintJob = true;
});
Connection connection = null;
bool linePrintEnabled = false;
try {
await Task.Factory.StartNew(() => {
connection = ConnectionCreator.Create(selectedPrinter);
connection.Open();
string originalPrinterLanguage = SGD.GET(DeviceLanguagesSgd, connection);
linePrintEnabled = "line_print".Equals(originalPrinterLanguage, StringComparison.OrdinalIgnoreCase);
if (linePrintEnabled)
{
SGD.SET(DeviceLanguagesSgd, "zpl", connection);
}
ZebraPrinter printer = ZebraPrinterFactory.GetInstance(connection);
ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(printer);
string errorMessage = GetPrinterStatusErrorMessage(printer.GetCurrentStatus());
if (errorMessage != null)
{
throw new PrinterNotReadyException($"{errorMessage}. Please check your printer and try again.");
}
else
{
if (format.Source != FormatSource.Printer)
{
connection.Write(Encoding.UTF8.GetBytes(format.Content));
}
linkOsPrinter.PrintStoredFormatWithVarGraphics(format.PrinterPath, BuildFormatVariableDictionary(), "UTF-8");
}
});
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
await Task.Factory.StartNew(() => {
viewModel.IsSendingPrintJob = false;
});
} catch (PrinterNotReadyException e) {
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
await Task.Factory.StartNew(() => {
viewModel.IsSendingPrintJob = false;
});
await AlertCreator.ShowAsync(this, "Printer Error", e.Message);
} catch (Exception e) {
if (linePrintEnabled)
{
await ResetPrinterLanguageToLinePrintAsync(connection);
}
await Task.Factory.StartNew(() => {
viewModel.IsSendingPrintJob = false;
});
await AlertCreator.ShowErrorAsync(this, e.Message);
} finally {
await Task.Factory.StartNew(() => {
try {
connection?.Close();
} catch (ConnectionException) { }
});
}
}
private void GetPrinterStatus()
{
Connection printerConnection = null;
Task.Run(() => {
try {
printerConnection = connectionSelector.GetConnection();
printerConnection.Open();
ZebraPrinter printer = ZebraPrinterFactory.GetInstance(printerConnection);
ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.CreateLinkOsPrinter(printer);
ZebraPrinterStatus status = (linkOsPrinter != null) ? linkOsPrinter.GetCurrentStatus() : printer.GetCurrentStatus();
string[] printerStatusString = new PrinterStatusMessages(status).GetStatusMessage();
List <string> printerStatusPrefix = GetPrinterStatusPrefix(status);
StringBuilder sb = new StringBuilder();
foreach (string s in printerStatusPrefix)
{
sb.AppendLine(s);
}
foreach (string s in printerStatusString)
{
sb.AppendLine(s);
}
Application.Current.Dispatcher.Invoke(() => {
printerStatus.Text = sb.ToString();
});
} catch (ConnectionException e) {
MessageBoxCreator.ShowError(e.Message, "Connection Error");
} catch (ZebraPrinterLanguageUnknownException e) {
MessageBoxCreator.ShowError(e.Message, "Connection Error");
} finally {
if (printerConnection != null)
{
try {
printerConnection.Close();
} catch (ConnectionException) {
} finally {
SetTestButtonState(true);
}
}
else
{
SetTestButtonState(true);
}
}
});
}
private async void TestButton_Clicked(object sender, EventArgs eventArgs)
{
SetInputEnabled(false);
bool printJobFinished = false;
MultichannelConnection multichannelConnection = null;
try {
multichannelConnection = CreateMultichannelConnection();
if (multichannelConnection == null)
{
return;
}
ZebraPrinter linkOsPrinter = null;
await Task.Factory.StartNew(() => {
multichannelConnection.Open();
linkOsPrinter = ZebraPrinterFactory.GetLinkOsPrinter(multichannelConnection.StatusChannel);
});
Task statusTask = Task.Factory.StartNew(() => {
int queryCount = 0;
List <string> odometerSettings = new List <string> {
"odometer.total_label_count",
"odometer.total_print_length"
};
while (multichannelConnection.StatusChannel.Connected && !printJobFinished)
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
LinkOsInformation linkOsInformation = new LinkOsInformation(SGD.GET("appl.link_os_version", multichannelConnection));
Dictionary <string, string> odometerSettingsMap = new SettingsValues().GetValues(odometerSettings, multichannelConnection.StatusChannel, linkOsPrinter.PrinterControlLanguage, linkOsInformation);
PrinterStatus printerStatus = linkOsPrinter.GetCurrentStatus();
queryCount++;
stopwatch.Stop();
Device.BeginInvokeOnMainThread(() => {
UpdateResult(queryCount, stopwatch.ElapsedMilliseconds, printerStatus, odometerSettingsMap);
});
}
});
Task printingTask = Task.Factory.StartNew(async() => {
try {
multichannelConnection.PrintingChannel.Write(GetTestLabelBeginningBytes(linkOsPrinter.PrinterControlLanguage));
await Task.Delay(500);
multichannelConnection.PrintingChannel.Write(GetTestLabelEndBytes(linkOsPrinter.PrinterControlLanguage));
await Task.Delay(3000);
} catch (Exception e) {
throw e;
} finally {
printJobFinished = true;
}
});
Task aggregateTask = Task.WhenAll(statusTask, printingTask);
await aggregateTask;
if (aggregateTask.Exception != null)
{
throw aggregateTask.Exception;
}
} catch (Exception e) {
ResultLabel.Text = $"Error: {e.Message}";
await DisplayAlert("Error", e.Message, "OK");
} finally {
try {
multichannelConnection?.Close();
} catch (ConnectionException) { }
SetInputEnabled(true);
}
}