/****************************************************************************************************
* Description: Sends a selected ZPL command to the Zebra printer over bluetooth and reads response.
*****************************************************************************************************/
private void bluetoothBtnSend_Click(object sender, EventArgs e)
{
String cmdSend = null;
String readResponse = null;
int nBytes = 0;
if (thePrinterConn != null)
{
if (bluetoothSndList.SelectedIndex >= 0)
{
cmdSend = bluetoothSndList.SelectedItem.ToString();
thePrinterConn.Write(Encoding.Default.GetBytes(cmdSend));
statusString = "Command Sent: " + cmdSend.Trim();
bluetoothListResponse.Items.Add(statusString);
Thread.Sleep(500);
nBytes = thePrinterConn.BytesAvailable();
byte[] bData = new byte[nBytes];
bData = thePrinterConn.Read();
readResponse = System.Text.ASCIIEncoding.ASCII.GetString(bData, 0, bData.Length);
statusString = "Received Data: " + readResponse;
bluetoothListResponse.Items.Add(statusString);
}
else
{
MessageBox.Show("Select command to be sent.");
}
}
else
{
MessageBox.Show("The printer isn't connected. Please connect the printer before sending commnd...");
}
}
/****************************************************************************************************
* Description: Opens a usb connection with the printer. Sends selected zpl command to the printer and reads
* response.
*****************************************************************************************************/
private void usbBtnSend_Click(object sender, EventArgs e)
{
String cmdSend = null;
String readResponse = null;
int nBytes = 0;
if (usbSndList.SelectedIndex >= 0)
{
try
{
// Instantiate connection for ZPL USB port with a given port name.
thePrinterConn = new UsbPrinterConnection("LPT1:"); // "LPT" is the default prefix for most Windows CE/Mobile USB ports
// Open the connection - physical connection is established here.
thePrinterConn.Open();
// This example prints "This is a ZPL test." near the top of the label.
cmdSend = usbSndList.SelectedItem.ToString() + "\r\n";
// Send the data to printer as a byte array.
thePrinterConn.Write(Encoding.Default.GetBytes(cmdSend));
statusString = "Command Sent: " + cmdSend.Trim();
usbListResponse.Items.Add(statusString);
Thread.Sleep(500);
nBytes = thePrinterConn.BytesAvailable();
byte[] bData = new byte[nBytes];
bData = thePrinterConn.Read();
readResponse = System.Text.ASCIIEncoding.ASCII.GetString(bData, 0, bData.Length);
statusString = "Received Data: " + readResponse;
// If response is longer than devide the received byte stream into multiple
// streams of 46 characters to diplay it properly in listbox.
if (statusString.Length < 46)
{
usbListResponse.Items.Add(statusString);
}
else
{
String tempStatusString = statusString;
while (tempStatusString.Length > 0)
{
if ((tempStatusString.Length - 46) > 0)
{
usbListResponse.Items.Add(tempStatusString.Substring(0, 46));
tempStatusString = tempStatusString.Remove(0, 46);
}
else
{
usbListResponse.Items.Add(tempStatusString.Substring(0, tempStatusString.Length));
tempStatusString = tempStatusString.Remove(0, tempStatusString.Length);
}
}
}
usbListResponse.Refresh();
// Close the connection to release resources.
thePrinterConn.Close();
thePrinterConn = null;
}
catch (ZebraPrinterConnectionException)
{
// Handle communications error here.
MessageBox.Show("Unable to connect with printer.");
return;
}
catch (ZebraException)
{
MessageBox.Show("Unable to connect with printer.\r\nCheck that printer is on.");
return;
}
catch (Exception)
{
MessageBox.Show("Exception Thrown");
return;
}
}
else
{
MessageBox.Show("Please select a command to be Sent...");
return;
}
}
