private void UpdateListViewGuardian()
{
guardians = DbOperations.GetAllGuardians();
listViewGuardian.Items.Refresh();
listViewGuardian.ItemsSource = guardians;
}
private void BtnSearchGuardian_Click(object sender, RoutedEventArgs e)
{
guardians = DbOperations.GetGuardian(txtLastNameGuardian.Text);
listViewGuardian.Items.Refresh();
listViewGuardian.ItemsSource = guardians;
}
private void GetAttendances()
{
attendances = DbOperations.Getabscenceasguardian();
ListView.Items.Refresh();
ListView.ItemsSource = attendances;
}