private void btnGravarAlteracao_Click(object sender, EventArgs e) { AgendaBll fornecedorBll = new AgendaBll(); DataRowView drv = ((DataRowView)cmbboxContatos.SelectedItem); int id = int.Parse(drv.Row.ItemArray[0].ToString()); fornecedorBll.EditarContato(id, txtbxNome.Text, txtbxTelefone.Text); txtbxNome.Text = ""; txtbxTelefone.Text = ""; }