private void btn_Devamsızlık_Click(object sender, EventArgs e)
{
frm_Devam_Index frm3 = new frm_Devam_Index();
frm3.ShowDialog();
frm3.Close();
}
private void frm_Devam_Ekle_FormClosed(object sender, FormClosedEventArgs e)
{
this.Close();
this.Hide();
frm_Devam_Index frm = (frm_Devam_Index)Application.OpenForms["frm_Devam_Index"];
str = @"SELECT Ogrenci_Ders.Ogr_Ders_ID AS 'ID',
Ogrenci_Kaydi.No AS 'Ogr No',
Ogrenci_Kaydi.AdSoyad AS 'Ad Soyad',
Ders_Bilgi.DersNo AS 'Ders Kodu',
Ders_Bilgi.DersAdi AS 'Ders Adı',
Ders_Bilgi.DersHoca AS 'Öğretim Görevlisi',
Ogrenci_Ders.DersToplam AS 'Toplam Ders',
Ogrenci_Ders.DersDevamsiz AS 'Devamsız'
FROM Ogrenci_Ders
INNER JOIN Ogrenci_Kaydi ON Ogrenci_Ders.Ogr_ID = Ogrenci_Kaydi.Ogr_ID
INNER JOIN Ders_Bilgi ON Ders_Bilgi.Ders_ID = Ogrenci_Ders.Ders_ID";
frm.dataGridView1.DataSource = DBLayer.TabloSorgula(str);
}