public static void GetDeviceStatus(string portName, string portSettings, int timeout, Action <Result, IPrinterStatus> action)
{
Task task = new Task(() =>
{
Result result = Result.UnknownError;
IPort port = null;
IPrinterStatus printerStatus = null;
try
{
result = Result.GetPortError;
port = Port.GetPort(portName, portSettings, timeout);
result = Result.GetParsedStatusError;
printerStatus = port.GetParsedStatus();
result = Result.Success;
}
catch (Exception exception)
{
DebugExt.WriteLine(exception.Message);
}
finally
{
if (port != null)
{
Port.ReleasePort(port);
port = null;
}
}
Device.BeginInvokeOnMainThread(() => {
action(result, printerStatus);
});
});
task.Start();
}
public static void SearchPrinter(string target, Action <IList <PortInfo> > action)
{
Task task = new Task(() =>
{
IList <PortInfo> portInfoList = new List <PortInfo>();
try
{
portInfoList = Port.SearchPrinter(target);
}
catch (Exception exception)
{
DebugExt.WriteLine(exception.Message);
}
Device.BeginInvokeOnMainThread(() => {
action(portInfoList);
});
});
task.Start();
}
public static void SendCommands(byte[] commands, string portName, string portSettings, int timeout, Action <Result> action)
{
Task task = new Task(() =>
{
Result result = Result.UnknownError;
IPort port = null;
IPrinterStatus printerStatus;
try
{
result = Result.GetPortError;
port = Port.GetPort(portName, portSettings, timeout);
result = Result.BeginCheckedBlockError;
printerStatus = port.BeginCheckedBlock();
if (printerStatus.Offline)
{
throw new Exception("Printer is offline (BeginCheckedBlock)");
}
result = Result.WritePortError;
DateTime startDateTime = DateTime.Now;
int total = 0;
while (true)
{
int written = port.WritePort(commands, total, commands.Length - total);
total += written;
// if (total == commands.Length)
if (total >= commands.Length)
{
break;
}
TimeSpan timeSpan = DateTime.Now - startDateTime;
if (timeSpan.TotalMilliseconds >= 30000) // 30000mS!!!
{
throw new Exception("Write port timed out");
}
}
result = Result.EndCheckedBlockError;
port.EndCheckedBlockTimeoutMillis = 30000; // 30000mS!!!
printerStatus = port.EndCheckedBlock();
if (printerStatus.Offline)
{
throw new Exception("Printer is offline (EndCheckedBlock)");
}
result = Result.Success;
}
catch (Exception exception)
{
DebugExt.WriteLine(exception.Message);
}
finally
{
if (port != null)
{
Port.ReleasePort(port);
port = null;
}
}
Device.BeginInvokeOnMainThread(() => {
action(result);
});
});
task.Start();
}
