// Add Student duymesine basildiqda bash verenler
private void btnAddStudent_Click(object sender, EventArgs e)
{
// Add student forumundaki inputlara daxil edilenlerin yerlerine oyulmasi
string firstname = txtFirstname.Text;
string lastname = txtLastname.Text;
string email = txtEmail.Text;
// secilmish qrupun ID nomresinin groupID-ye verilmesi
string groupId = ((GroupCombo)cmbGroups.SelectedItem).Value;
// Group tipinden deyishen yaradiriq
// ve Qrup siyahisinin ID-lerinden secilmishini deyishene veririk
Group selectedGroup = GroupList.GetGroupById(groupId);
if (selectedGroup == null) // eger secilmish qrup yoxdursa
{
MessageBox.Show("Group doesn't exist");
return;
}
// Studentlerin siyahisina yeni studentin elave elave edilmesi
StudentList.Add(new Student
{
Firstname = firstname,
Lastname = lastname,
Email = email,
Group = selectedGroup
});
//txtFirstname.Text = "";
//txtLastname.Text = "";
//txtEmail.Text = "";
}
private void btnDelGroup_Click(object sender, EventArgs e)
{
DialogResult question = MessageBox.Show("Are you sure?", "All book list in for this author will be deleted!", MessageBoxButtons.YesNo);
if (question == DialogResult.Yes)
{ //========================= Group-un silinmesi ====================================
// downcast edirik ve comboBoxda secilmish groupun ID nomresini groupID-ye veririk
string groupID = ((GroupCombo)cmbDel.SelectedItem).Value;
// GroupList-den secilmish qrupu ID-ye gore tapib veririk Group tipinde groupToDeleted-e
// bir nov apcast olunur ki Group-un icinden lazim olana catsin
Group groupToDeleted = GroupList.GetGroupById(groupID);
// GroupList-den Group classina girib Groups siyahisindan
// ID-ci uyqun geleni silirik
GroupList.Groups.Remove(groupToDeleted);
//==================================================================================
//=========== Silinen Group-un Student siyahisinin silinmesi =====================//
// silinen group-un icindeki studentleri yeni List massivine yiqiriq
List <Student> studentToBedeleted = StudentList.GetStudentsByGroup(groupToDeleted);
// ve hemin massiv siralanir ve siyahidaki studentName-ler silinir
foreach (Student studentName in studentToBedeleted)
{
StudentList.Students.Remove(studentName);
}
// Group-larin siyahisi yenilenir
UpdateCombo();
}
else
{
MessageBox.Show("You are cancelled deletion!");
}
}