private void btnPrint_Click(object sender, EventArgs e)
{
if (_serPort != null)
{
Cursor.Current = Cursors.WaitCursor;
try
{
if (!_serPort.IsOpen)
{
_serPort.Open();
}
_serPort.WriteTimeout = 15000;
//send layout once per session
if (!res._bLayoutSended)
{
string sLayout = res.getLayoutPRN();
if (sLayout.Length == 0)
{
throw new NullReferenceException("LayoutPRN is empty!");
}
byte[] bLayout = Encoding.UTF8.GetBytes(sLayout);
_serPort.Write(bLayout, 0, bLayout.Length);
res._bLayoutSended = true;
}
//string sSample = res.getSamplePRN();
string sSample = res.getPriceMark(txtPriceOld.Text, txtPriceNew.Text, _iLang);
if (sSample.Length == 0)
{
throw new NullReferenceException("Print data is empty!");
}
byte[] bSample = Encoding.UTF8.GetBytes(sSample);
_serPort.Write(bSample, 0, bSample.Length);
}
catch (Exception ex)
{
Cursor.Current = Cursors.Default;
System.Diagnostics.Debug.WriteLine("Exception in print(): " + ex.Message);
Helpers.logError("Exception in print(): " + ex.Message);
MessageBox.Show("Printing failed. Please restart. " + ex.Message);
_serPort.Close();
}
finally
{
Cursor.Current = Cursors.Default;
}
}
}
