/// <summary>
/// Handles the event when the user leave the masked student number textbox.
/// Updates the form fields based on the student number
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void studentNumberMaskedTextBox_Leave(object sender, EventArgs e)
{
BITCollege_TravisTaylorContext db = new BITCollege_TravisTaylorContext();
try
{
if (studentNumberMaskedTextBox.MaskCompleted == true)
{
string boxValue = studentNumberMaskedTextBox.Text;
long studentNumber = long.Parse(boxValue);
Student student = (from results
in db.Students
where results.StudentNumber == studentNumber
select results).SingleOrDefault();
if (student != null)
{
studentBindingSource.DataSource = student;
registrationNumberComboBox.Enabled = true;
int studentID = student.StudentId;
IQueryable <Registration> registrations = from results
in db.Registrations
where results.StudentId == studentID
select results;
if (registrations.Count() > 0)
{
lnkUpdate.Enabled = true;
lnkDetails.Enabled = true;
registrationBindingSource.DataSource = registrations.ToList();
//If it is not null, then we are returning from another form
//Sets the drop down list that is generated to the current registration
if (constructorData.registration != null)
{
registrationNumberComboBox.Text = constructorData.registration.RegistrationNumber.ToString();
}
}
else
{
lnkUpdate.Enabled = false;
lnkDetails.Enabled = false;
registrationBindingSource.Clear();
}
}
else
{
MessageBox.Show("Student Number does not exist");
registrationNumberComboBox.Enabled = false;
lnkDetails.Enabled = false;
lnkUpdate.Enabled = false;
studentBindingSource.Clear();
registrationBindingSource.Clear();
studentNumberMaskedTextBox.Focus();
}
}
registrationNumberComboBox.Focus();
}
catch (Exception exception)
{
studentBindingSource.Clear();
registrationBindingSource.Clear();
MessageBox.Show(exception.Message);
}
}