private void btnSil_Click(object sender, EventArgs e)
        {
            Uye silicenekuye = new Uye();

            silicenekuye = (Uye)dataGridView1.CurrentRow.DataBoundItem;
            uye.uyesil(silicenekuye);
            Listele();
            TxtUyeAd.Clear();
            TxtUyeSoyad.Clear();
            TxtUyeTC.Clear();
            MTxtUyeTelNo.Clear();
            CBUyeCinsiyet.Text = " ";
        }
        private void btnGuncelle_Click(object sender, EventArgs e)
        {
            Uye eskiuye = new Uye();

            eskiuye = (Uye)dataGridView1.CurrentRow.DataBoundItem;
            Uye yeniuye = new Uye();

            yeniuye.TCNO     = Convert.ToDouble(TxtUyeTC.Text);
            yeniuye.AD       = TxtUyeAd.Text;
            yeniuye.SOYAD    = TxtUyeSoyad.Text;
            yeniuye.TELEFON  = MTxtUyeTelNo.Text;
            yeniuye.CINSIYET = CBUyeCinsiyet.Text;
            uye.uyeguncelle(eskiuye, yeniuye);
            Listele();
            TxtUyeAd.Clear();
            TxtUyeSoyad.Clear();
            TxtUyeTC.Clear();
            MTxtUyeTelNo.Clear();
            CBUyeCinsiyet.Text = " ";
        }
        private void btnEkle_Click(object sender, EventArgs e)
        {
            if (TxtUyeTC.TextLength < 11)
            {
                MessageBox.Show("Tc Kimlik No 11 Haneden Küçük!!!");
            }
            else
            {
                Uye yeniuye = new Uye();
                yeniuye.TCNO = Convert.ToDouble(TxtUyeTC.Text);

                yeniuye.AD       = TxtUyeAd.Text;
                yeniuye.SOYAD    = TxtUyeSoyad.Text;
                yeniuye.TELEFON  = MTxtUyeTelNo.Text;
                yeniuye.CINSIYET = CBUyeCinsiyet.Text;
                uye.uyeekle(yeniuye);
                Listele();
                TxtUyeAd.Clear();
                TxtUyeSoyad.Clear();
                TxtUyeTC.Clear();
                MTxtUyeTelNo.Clear();
                CBUyeCinsiyet.Text = " ";
            }
        }