C# pretraga korisnika (iz baze) kroz textbox i prikaz u listview-u

Code:

private void tbDuznik_KeyUp(object sender, KeyEventArgs e)
        {
            listViewDuznici.Items.Clear();
            SqlConnection SqlKonekcija = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=Kamate;Integrated Security=True");
            SqlCommand komanda = SqlKonekcija.CreateCommand();
            komanda.CommandText = "SELECT * FROM Duznik WHERE ImeDuznik LIKE '" + tbDuznik.Text + "%'"; 
            try
            {
                komanda.Connection.Open();
                SqlDataReader citac = komanda.ExecuteReader();
                while (citac.Read())
                {
                    listViewDuznici.Items.Add(citac["ImeDuznik"].ToString());
                }
            }
            catch
            {
            }
            finally
            {
                komanda.Connection.Close(); //na kraju se zatvara konekcija
            }
        }