private void AddStudentButton_Click(object sender, RoutedEventArgs e)
{
if (AddStudentWindow != null)
{
return;
}
AddStudentWindow = new AddStudentWindow(this, _connectionString, _userCredential);
AddStudentWindow.Show();
}
private void ExitButton_Click(object sender, RoutedEventArgs e)
{
new AuthorizationWindow().Show();
if (RegistrationWindow != null)
{
RegistrationWindow.Close();
}
if (AddStudentWindow != null)
{
AddStudentWindow.Close();
}
if (EditStudentWindow != null)
{
EditStudentWindow.Close();
}
if (AddGroupWindow != null)
{
AddGroupWindow.Close();
}
if (EditGroupWindow != null)
{
EditGroupWindow.Close();
}
if (AddSubjectInfoWindow != null)
{
AddSubjectInfoWindow.Close();
}
if (EditSubjectInfoWindow != null)
{
EditSubjectInfoWindow.Close();
}
if (AddTeacherWindow != null)
{
AddTeacherWindow.Close();
}
if (EditTeacherWindow != null)
{
EditTeacherWindow.Close();
}
if (AddAssociatedSubjectWindow != null)
{
AddAssociatedSubjectWindow.Close();
}
if (EditAssociatedSubjectWindow != null)
{
EditAssociatedSubjectWindow.Close();
}
Close();
}