private void dataGridView2_CellContentClick(object sender, DataGridViewCellEventArgs e)
 {
     if (e.ColumnIndex == 4)
     {
         ActiviteDTO activiteDTO = (ActiviteDTO)dataGridView2.Rows[e.RowIndex].Cells[4].Tag;
         if (activiteDTO != null)
         {
             MenuActivite form = new MenuActivite(activiteDTO);
             form.Owner = this;
             form.ShowDialog();
         }
     }
 }
        private void button3_Click(object sender, EventArgs e) //Chercher Activite par id
        {
            labelMessageActivite.Text = "";
            String idActivite = textBox2.Text;

            try
            {
                ActiviteDTO  activiteDTO = DbCreateur.ServiceActivite.findById(idActivite);
                MenuActivite form        = new MenuActivite(activiteDTO);
                form.Owner = this;
                form.ShowDialog();
            }
            catch
            {
                labelMessageActivite.Text = "ID introuvable";
            }
        }