private void Button_Click(object sender, RoutedEventArgs e)
{
if (name.Text == "")
{
a1.Visibility = Visibility.Visible;
p.Visibility = Visibility.Visible;
if (hours.Text == "")
{
a2.Visibility = Visibility.Visible;
}
if (semester.Text == "")
{
a3.Visibility = Visibility.Visible;
}
if (speciality.Text == "")
{
a4.Visibility = Visibility.Visible;
}
}
else
{
if (hours.Text == "")
{
a2.Visibility = Visibility.Visible;
p.Visibility = Visibility.Visible;
if (semester.Text == "")
{
a3.Visibility = Visibility.Visible;
}
if (speciality.Text == "")
{
a4.Visibility = Visibility.Visible;
}
}
else
{
if (semester.Text == "")
{
a3.Visibility = Visibility.Visible;
p.Visibility = Visibility.Visible;
if (speciality.Text == "")
{
a4.Visibility = Visibility.Visible;
}
}
else
{
if (speciality.Text == "")
{
a4.Visibility = Visibility.Visible;
p.Visibility = Visibility.Visible;
}
else
{
ListInterface a = new ClassList();
a.AddDiscipline(name.Text, hours.Text, semester.Text, speciality.Text);
name.Clear();
hours.Clear();
semester.SelectedIndex = -1;
speciality.SelectedIndex = -1;
}
}
}
}
}