private void button1_Click(object sender, EventArgs e)
 {
     if (comboBox1.SelectedIndex == 0)
     {
         MessageBox.Show("Lütfen Stok Kartı Seçiniz.", "Hata", MessageBoxButtons.OK, MessageBoxIcon.Hand);
     }
     else
     {
         listView1.Items.Clear();
         EStok MyReserve = new EStok();
         MyReserve._stokid = Convert.ToInt32(comboBox1.SelectedValue);
         DataTable dtt = FStok.StokID(MyReserve);
         for (int i = 0; i < dtt.Rows.Count; i++)
         {
             ListViewItem lolo = new ListViewItem(dtt.Rows[i][1].ToString());
             lolo.SubItems.Add(dtt.Rows[i][2].ToString());
             lolo.SubItems.Add(dtt.Rows[i][3].ToString());
             lolo.SubItems.Add(dtt.Rows[i][4].ToString());
             listView1.Items.Add(lolo);
         }
         ForReserveID();
     }
 }