private void comboUruncesidi_SelectedIndexChanged(object sender, EventArgs e)
        {
            //Seçilin ürün çeşidinin özelliklerinin gösterilmesi:
            string comboDegeri = comboUruncesidi.Text;

            if (comboDegeri == "mouse")
            {
                DatasetTableAdapters.urunlerTableAdapter adaptor = new DatasetTableAdapters.urunlerTableAdapter();
                dataGridUrunler.DataSource = adaptor.mouseGetir();
            }
            else if (comboDegeri == "klavye")
            {
                DatasetTableAdapters.urunlerTableAdapter adaptor = new DatasetTableAdapters.urunlerTableAdapter();
                dataGridUrunler.DataSource = adaptor.klavyeGetir();
            }
            else if (comboDegeri == "harddisk")
            {
                DatasetTableAdapters.urunlerTableAdapter adaptor = new DatasetTableAdapters.urunlerTableAdapter();
                dataGridUrunler.DataSource = adaptor.harddiskGetir();
            }
            else if (comboDegeri == "işlemci")
            {
                DatasetTableAdapters.urunlerTableAdapter adaptor = new DatasetTableAdapters.urunlerTableAdapter();
                dataGridUrunler.DataSource = adaptor.islemciGetir();
            }
            else if (comboDegeri == "işletim sistemi")
            {
                DatasetTableAdapters.urunlerTableAdapter adaptor = new DatasetTableAdapters.urunlerTableAdapter();
                dataGridUrunler.DataSource = adaptor.isletimsistemiGetir();
            }
        }