// Delete Button Click
private void mainDeleteButton_Click(object sender, EventArgs e)
{
// Check that selected row is valid
if (selectedAppointmentID != -1)
{
// Delete appointment
DataInterface.deleteAppoinment(selectedAppointmentID);
}
else
{
// If not valid, display message
MessageBox.Show("Please select a customer to delete and try again.");
}
// Refresh appointment data
displayAppointments();
}
