public void Modifier() { New_emprunt emprunt = new New_emprunt(); int i = dataGridView1.CurrentRow.Index; emprunt.id = Convert.ToInt32(dataGridView1["Column1", i].Value.ToString()); emprunt.textBox1.Text = dataGridView1["Column5", i].Value.ToString(); emprunt.textBox2.Text = dataGridView1["Column7", i].Value.ToString(); emprunt.dateTimePicker1.Value = DateTime.Parse(dataGridView1["Column8", i].Value.ToString()); emprunt.btnSave.Text = " Update"; emprunt.btnNew.Enabled = false; DialogResult dlr = MessageBox.Show("Do you want to change this registration ?", "Message...", MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (dlr == DialogResult.Yes) { emprunt.ShowDialog(); } }