private void button1_Click(object sender, EventArgs e) { if (String.IsNullOrEmpty(Nom.Text) == true) { MessageBox.Show("Nom vide"); } else if (String.IsNullOrEmpty(Prenom.Text) == true) { MessageBox.Show("Prenom vide"); } else if (String.IsNullOrEmpty(Numero.Text) == true) { MessageBox.Show("Numero vide"); } else if (String.IsNullOrEmpty(Email.Text) == true) { MessageBox.Show("Email vide"); } else { Client cli = new Client(); cli._Nom = Nom.Text.ToString(); cli._Prenom = Prenom.Text.ToString(); cli._Numero = Int32.Parse(Numero.Text); cli._Email = Email.Text.ToString(); cli.insertclient(cli); MessageBox.Show("Client ajoute Client: " + Nom.Text + " Prenom " + Prenom.Text); //DataTable dt = new DataTable(); //dt = cli.RecupAllClient(); dataGridView1.DataSource = cli.RecupAllClient(); Prenom.Clear(); Nom.Clear(); Numero.Clear(); Email.Clear(); } }