private void BtnConnect_Click(object sender, RoutedEventArgs e)
{
try
{
if ((string)BtnConnect.Content == "Connect")
{
_serialPort.PortName = ArduinoPortName.Text;
_serialPort.BaudRate = 9600;
_serialPort.Parity = Parity.None;
_serialPort.StopBits = StopBits.One;
_serialPort.DataBits = 8;
_serialPort.Handshake = Handshake.None;
_serialPort.RtsEnable = true;
if (!(_serialPort.IsOpen))
{
_serialPort.Open();
}
BtnConnect.Content = "Disconnect";
ArduinoPortName.IsEnabled = false;
BtnScanCard.IsEnabled = true;
_serialPort.DataReceived += SerialPortOnDataReceived;
return;
}
if ((string)BtnConnect.Content == "Disconnect")
{
if (_serialPort.IsOpen)
{
_serialPort.Close();
}
BtnConnect.Content = "Connect";
TxtTagId.Clear();
BtnScanCard.IsEnabled = false;
ArduinoPortName.IsEnabled = true;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void BtnAddStudent_Click(object sender, RoutedEventArgs e)
{
try
{
//if ( string.IsNullOrEmpty(TxtStudentName.Text) || string.IsNullOrEmpty(TxtMatricNo.Text) || string.IsNullOrEmpty(TxtTagId.Text) )
if (string.IsNullOrEmpty(TxtStudentName.Text) || string.IsNullOrEmpty(TxtMatricNo.Text))
{
MessageBox.Show(@"All field required");
return;
}
if (IsMatricNo(TxtMatricNo.Text.Trim()) == false)
{
MessageBox.Show("Enter a valid MatricNo!");
return;
}
// TODO: save to tag
//WRITE
string cmd = "WRITE";
SendMessage(cmd);
MessageBox.Show("Place card on RFID reader");
Thread.Sleep(1000); // wait for (1sec) before saving to database
//Thread.Sleep(TimeSpan.FromSeconds(1));
//Task.Delay(100) --wait for a particular seconds before saving to db
var res = _receivedData;
var student = new Student
{
Name = TxtStudentName.Text.Trim(),
MatricNo = TxtMatricNo.Text.Trim(),
//TagID = TxtTagId.Text.Trim(),
TagID = _receivedData,
Department = StudentDept.Text
};
var maxId = (_db.Students.Select(p => (int?)p.ID).Max() ?? 0) + 1;
student.ID = maxId;
try
{
_db.Students.AddObject(student);
}
catch
{
_repo.Students = new List <Student> {
student
};
}
_db.SaveChanges();
//MessageBox.Show("Created successfully");
Refresh();
itemListView.ScrollIntoView(student);
TxtStudentName.Clear();
TxtMatricNo.Clear();
TxtTagId.Clear();
/*_db.SaveChanges();
* Refresh();
* itemListView.ScrollIntoView(student);
*
* // TODO: successful account
* //ACCOUNT_CREATED
* string cmd = "ACCOUNT_CREATED";
* SendMessage(cmd);
* TxtStudentName.Clear();
* TxtMatricNo.Clear();
* TxtTagId.Clear();*/
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}