SqlConnection con = new SqlConnection(@"Data Source=DESKTOP-2S2HS8O\MSSQLSERVER01; Initial Catalog=Kutuphane; Integrated Security=True;"); private void verileriGoruntule() { con.Open(); SqlCommand cmd = new SqlCommand("select * from kitaplar", con); SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read()) { ListViewItem ekle = new ListViewItem(); ekle.Text = dr["id"].ToString(); ekle.SubItems.Add(dr["kitapAd"].ToString()); ekle.SubItems.Add(dr["yazar"].ToString()); ekle.SubItems.Add(dr["sayfa"].ToString()); listView1.Items.Add(ekle); } con.Close(); } private void btnGuruntule_Click(object sender, EventArgs e) { verileriGoruntule(); }