private void cedulaCorreoModificarcomboBox_SelectedIndexChanged(object sender, EventArgs e) { correoModificarcomboBox.Items.Clear(); telefonoModificarcomboBox.Items.Clear(); correoModificarcomboBox.Text = ""; telefonoModificarcomboBox.Text = ""; correoNuevoModificartextBox.Text = ""; telefonoNuevoModificartextBox.Text = ""; sisVdatos sisV = new sisVdatos(); SqlDataReader dr = sisV.cargarCorreosPersonas(cedulaCorreoModificarcomboBox.SelectedItem.ToString()); while (dr.Read()) { correoModificarcomboBox.Items.Add(dr["correo"].ToString()); } SqlDataReader dr1 = sisV.cargarTelefonosPersonas(cedulaCorreoModificarcomboBox.SelectedItem.ToString()); while (dr1.Read()) { telefonoModificarcomboBox.Items.Add(dr1["telefono"].ToString()); } }