//fonction de recuperation des elements d'affichage et affichage dans le dropdownlist
        void affiche_dropdownListe()
        {
            con = new connexion();
            SqlDataReader rd = con.selectData("SELECT association_au_region.id_ass, region.nom_region, service.nom_service, poste.nom_poste FROM association_au_region INNER JOIN region ON association_au_region.id_region = region.id_region INNER JOIN service ON association_au_region.id_service = service.id_service INNER JOIN poste ON association_au_region.id_poste = poste.id_poste");

            DropDownListAssoc.Items.Clear();

            DropDownListAssoc.Items.Add("");

            while (rd.Read())
            {
                DropDownListAssoc.Items.Add(rd.GetInt32(0) + "          " + rd.GetString(1) + "       " + rd.GetString(2) + "       " + rd.GetString(3));
            }
        }
 //on click pour recuperer la photo d'un employer
 protected void voir_image_Click(object sender, ImageClickEventArgs e)
 {
     string[] matricule_emp = null;
     try
     {
         matricule_emp = DropDownListAssoc.SelectedItem.ToString().Split(' ');
         if (matricule_emp[0].Length > 0)
         {
             con = new connexion();
             SqlDataReader rd = con.selectData("select photo_empl from employer where matricule='" + matricule_emp[0] + "'");
             if (rd.HasRows)
             {
                 while (rd.Read())
                 {
                     byte[] imag    = (byte[])rd["photo_empl"];
                     string myImage = Convert.ToBase64String(imag, 0, imag.Length);
                     Image1.ImageUrl   = "data:photo_empl/png;base64," + myImage;
                     Label_valide.Text = "la photo a ete trouve";
                     label_erreur.Text = "";
                 }
             }
             else
             {
                 label_erreur.Text = "Image non trouve dans le stockage";
                 Label_valide.Text = "";
             }
         }
         else
         {
             label_erreur.Text = "selectionnez d'abord un employer dans la liste";
             Label_valide.Text = "";
         }
     }
     catch (Exception ex)
     {
         label_erreur.Text = "Image non trouve dans le stockage";
         Label_valide.Text = "";
     }
 }
        protected void Button2_Click1(object sender, EventArgs e)
        {
            con = new connexion();
            SqlDataReader rd = con.selectData("select matricule,nom,prenom from employer");

            if (rd.HasRows)
            {
                DropDownListAssoc.Items.Clear();
                DropDownListAssoc.Items.Add("");
                while (rd.Read())
                {
                    DropDownListAssoc.Items.Add(rd.GetString(0) + "     " + rd.GetString(1) + "     " + rd.GetString(2));
                }
                voir_image.Enabled = true;
                detaille.Enabled   = true;
            }
            else
            {
                labsucces.Text = "";
                error.Text     = "Acun employer trouve";
            }
        }