private void btnEnr_Click(object sender, EventArgs e)
        {
            if (txtNom.Text == "" || txtAdresse.Text == "")
            {
                MessageBox.Show("Veuillez remplir les champs.", "Information", MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
            }
            else
            {
                if (btnEnr.Text == "Ajouter")
                {
                    var dataClient = new Data_Clients(txtNom.Text.Trim(), txtAdresse.Text.Trim());
                    Fcts_Clients.AjouterClient(dataClient);
                }
                else if (btnEnr.Text == "Modifier")
                {
                    var dataClient = new Data_Clients(txtNom.Text.Trim(), txtAdresse.Text.Trim());
                    Fcts_Clients.ModifierClient(dataClient, id);
                }
            }

            _parent.Display();
        }