Insertion ,UPDATE,Suppression avec la fonction delegate

Bonjour tout le monde,
Je développe une application c# et a partir de liste de client et avec un menu nouveau un fiche client qui apparait, je veux utiliser la fonction delegate, s'il s'agit dune insertion la valeur -1 et envoyer si non null.
Le probleme que si l'insertion marche UPDATE ne marche pas!
Je mets au dessous le code de fiche client, liste client et classe client.

Merci pour votre aide :ccool:

***fiche client****

Code:

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace GESTION_GSM_ET_AUTRES.CLIENT_FOLDER
{
    public partial class CREATION_CLIENT : Form
    {
 
        public event enregistrer_event enregistrer;
        public delegate void enregistrer_event(DataRowView dr,bool nouv);
        string CODE_CLIENT = "-1";
        public CREATION_CLIENT(string CODE_CLIENT)
        {
            InitializeComponent();
            this.CODE_CLIENT = CODE_CLIENT;
        }
        private void buttonEnregistrer_Click_1(object sender, EventArgs e)
        {
            try
            {
                try
                {
 
                 bs.EndEdit();
                   dt.AcceptChanges();
                }
                catch (Exception er)
                {
                    MessageBox.Show(er.Message, "Attention!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                  dt.RejectChanges();
                  return;
 
                }
                string res = "";
                if (CODE_CLIENT == "-1")
                {
                    Application.DoEvents();
                    CLIENT clt = new CLIENT();
                   res = clt.INSERT_CLIENT(CODE_CLIENT, CATEGORIE_CLIENT.SelectedText, NOM_CLIENT.Text, MATRICULE_FISC_CLIENT.Text, ADRESSE_CLIENT.Text, PORT_CLIENT.Text, EMAIL_CLIENT.Text, TEL_CLIENT.Text, FAX_CLIENT.Text, EXO_CLIENT.Checked, MAJ_TVA_CLIENT.Checked, TAUX_TVA_CLIENT.Text, TIMBRE_CLIENT.Checked, REMISE_CLIENT.Text, MONTANT_TOT_CLIENT.Text, ETAT_CLIENT.Checked);
                   if (enregistrer != null)
                       enregistrer((DataRowView)bs.Current,true);
                }
                else
                {
                    Application.DoEvents();
                    CLIENT clt = new CLIENT();
                    res = clt.UPDATE_CLIENT(CODE_CLIENT, CATEGORIE_CLIENT.SelectedText, NOM_CLIENT.Text, MATRICULE_FISC_CLIENT.Text, ADRESSE_CLIENT.Text, PORT_CLIENT.Text, EMAIL_CLIENT.Text, TEL_CLIENT.Text, FAX_CLIENT.Text, EXO_CLIENT.Checked, MAJ_TVA_CLIENT.Checked, TAUX_TVA_CLIENT.Text, TIMBRE_CLIENT.Checked, REMISE_CLIENT.Text, MONTANT_TOT_CLIENT.Text, ETAT_CLIENT.Checked);
                    if (enregistrer != null)
                        enregistrer((DataRowView)bs.Current,false);
                }
                if (res == "OK")
                {
                    MessageBox.Show("L'enregistrement à été effectuée avec succès.", "Insertion Client", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    this.Close();
                }
                else
 
                    MessageBox.Show(res, "Insertion Client", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }     
            catch (Exception er)
            {
                MessageBox.Show(er.Message, "Veuiller Vérifier vos paramètres!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
    }
 
 
        DataTable dt;
        BindingSource bs = new BindingSource();
        private void CREATION_CLIENT_Shown(object sender, EventArgs e)
        {
            CLIENT clt=new CLIENT();
            dt= clt.LOAD_CLIENT(CODE_CLIENT);
            bs.DataSource = dt;
 
            NOM_CLIENT.DataBindings.Add("Text", bs, "NOM_CLIENT",true);
            MATRICULE_FISC_CLIENT.DataBindings.Add("Text", bs, "MATRICULE_FISC_CLIENT", true);
 
            PORT_CLIENT.DataBindings.Add("Text", bs, "PORT_CLIENT", true);
            EMAIL_CLIENT.DataBindings.Add("Text", bs, "EMAIL_CLIENT", true);
            TEL_CLIENT.DataBindings.Add("Text", bs, "TEL_CLIENT", true);
            FAX_CLIENT.DataBindings.Add("Text", bs, "FAX_CLIENT", true);
            ADRESSE_CLIENT.DataBindings.Add("Text", bs, "ADRESSE_CLIENT", true);
            EXO_CLIENT.DataBindings.Add("Checked", bs, "EXO_CLIENT", true);
            MAJ_TVA_CLIENT.DataBindings.Add("Checked", bs, "MAJ_TVA_CLIENT", true);
            TIMBRE_CLIENT.DataBindings.Add("Checked", bs, "TIMBRE_CLIENT", true);
            TAUX_TVA_CLIENT.DataBindings.Add("Text", bs, "TAUX_TVA_CLIENT", true);
            REMISE_CLIENT.DataBindings.Add("Text", bs, "REMISE_CLIENT", true);
            MONTANT_TOT_CLIENT.DataBindings.Add("Text", bs, "MONTANT_TOT_CLIENT", true);
 
            ETAT_CLIENT.DataBindings.Add("Checked", bs, "ETAT_CLIENT", true);
            //CATEGORIE_CLIENT.DataBindings.Add("Items", bs, "CATEGORIE_CLIENT");
            if (CODE_CLIENT == "-1")
            {
                bs.AddNew();
                DataRowView drv = (DataRowView)bs.Current;
                drv["CODE_CLIENT"] = -1;
                drv["ETAT_CLIENT"] = false;
                drv["EXO_CLIENT"] = false;
                drv["MAJ_TVA_CLIENT"] = false;
                drv["TIMBRE_CLIENT"] = false;
            }
        }
 
        private void buttonFERMER_Click(object sender, EventArgs e)
        {
            this.Close();
        }
 
    }
}

******liste client*****

Code:

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CLIENT_PRO_DLL;
 
namespace GESTION_GSM_ET_AUTRES.CLIENT_FOLDER
{
    public partial class LISTE_CLIENTS : Form
    {
        DataTable dt;
        BindingSource bs = new BindingSource();
        public LISTE_CLIENTS()
        {
            InitializeComponent();
        }
 
        private void LISTE_CLIENTS_Shown(object sender, EventArgs e)
        {
 
 
            try
            {
                CLIENT clt = new CLIENT();
                dt = clt.SELECT_ALL_CLIENT();
                bs.DataSource = dt;
                dataGridViewLISTE_CLT.DataSource = bs;
 
            }
            catch (Exception er)
            {
                MessageBox.Show(er.Message, "Affichage données", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void MENU_NOUV_CLT_Click(object sender, EventArgs e)
        {
            CREATION_CLIENT cf = new CREATION_CLIENT("-1");
            cf.enregistrer += new CREATION_CLIENT.enregistrer_event(cf_enregistrer);
            cf.ShowDialog();
        }
 
        void cf_enregistrer(DataRowView dr,bool nouv)
        {
            if(nouv)
            bs.AddNew();
            DataRowView drv = (DataRowView)bs.Current;
            drv["CODE_CLIENT"] = dr["CODE_CLIENT"];
            drv["NOM_CLIENT"] = dr["NOM_CLIENT"];
            drv["PORT_CLIENT"] = dr["PORT_CLIENT"];
            drv["EMAIL_CLIENT"] = dr["EMAIL_CLIENT"];
            drv["FAX_CLIENT"] = dr["FAX_CLIENT"];
            drv["ADRESSE_CLIENT"] = dr["ADRESSE_CLIENT"];
            bs.EndEdit();
            dt.AcceptChanges();
        }
 
 
 
        private void RECH_TEXT_KeyDown(object sender, KeyEventArgs e)
        {
            if (RECH_TEXT.Focused && e.KeyCode == Keys.Enter)
            {
                try
                {
                    CLIENT clt = new CLIENT();
                    dataGridViewLISTE_CLT.DataSource = clt.RECHERCHE_CLIENT(RECH_TEXT.Text);
                }
                catch (Exception er)
                {
                    MessageBox.Show(er.Message,"Invalid", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
 
        private void MENU_MODIF_CLT_Click(object sender, EventArgs e)
        {
            if (bs.Current != null)
            {
                DataRowView drv = (DataRowView)bs.Current;
                CREATION_CLIENT cf = new CREATION_CLIENT(drv["CODE_CLIENT"].ToString());
                cf.enregistrer += new CREATION_CLIENT.enregistrer_event(cf_enregistrer);
                cf.ShowDialog();
            }
        }
 
        private void MENU_SUPP_CLT_Click(object sender, EventArgs e)
        {
            if (bs.Current != null)
            {
                if (MessageBox.Show("Voulez Vous confirmer la suppression ?", "Confirmation", MessageBoxButtons.YesNo, MessageBoxIcon.Question,MessageBoxDefaultButton.Button2) == DialogResult.Yes)
                {
                    try
                    {
                        CLIENT clt = new CLIENT();
                        DataRowView drv = (DataRowView)bs.Current;
                        string res = clt.DELETE_CLIENT(drv["CODE_CLIENT"].ToString());
                        if (res == "OK")
                        {
                            bs.RemoveCurrent();
                            dt.AcceptChanges();
                        }
                        else
                        {
                            MessageBox.Show(res, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error);
                        }
 
                    }
                    catch(Exception er)
                              {
                                MessageBox.Show(er.Message,"Erreur Suppression!",MessageBoxButtons.OK,MessageBoxIcon.Question,MessageBoxDefaultButton.Button2);
                              }
             }
          }
       }
 
        private void LISTE_CLIENTS_KeyDown(object sender, KeyEventArgs e)
        {
            if (RECH_TEXT.Focused && e.KeyCode == Keys.Enter)
            {
                try
                {
                    CLIENT clt = new CLIENT();
                    dataGridViewLISTE_CLT.DataSource = clt.RECHERCHE_CLIENT(RECH_TEXT.Text);
                }
                catch (Exception er)
                {
                    MessageBox.Show(er.Message, "Invalid", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            if (e.KeyCode == Keys.Delete && dataGridViewLISTE_CLT.Focused)
                MENU_SUPP_CLT.PerformClick();
        }
 
        private void MENU_IMP_LISTE_CLT_Click(object sender, EventArgs e)
        {
            this.Cursor = Cursors.WaitCursor;
            try
            {
                DataSetETAT_CLIENT ds = new DataSetETAT_CLIENT();
                //REMPLIR LA TABLE CLIENT
                Application.DoEvents();
                foreach (DataRow dr in dt.Rows)
                {
                    DataRow d = ds.CLIENT.NewCLIENTRow();
                    d["CODE_CLIENT"] = dr["CODE_CLIENT"];
                    d["NOM_CLIENT"] = dr["NOM_CLIENT"];
                    d["CATEGORIE_CLIENT"] = dr["CATEGORIE_CLIENT"];
                    d["PORT_CLIENT"] = dr["PORT_CLIENT"];
                    d["FAX_CLIENT"] = dr["FAX_CLIENT"];
                    d["EMAIL_CLIENT"] = dr["EMAIL_CLIENT"];
                    d["ADRESSE_CLIENT"] = dr["ADRESSE_CLIENT"];
                    ds.CLIENT.Rows.Add(d);
                }
                CrystalReportLISTE_CLIENT c = new CrystalReportLISTE_CLIENT();
                c.SetDataSource(ds);
                ETAT_CLIENT etat = new ETAT_CLIENT();
                etat.AFFICHEUR_ETAT_CLT.ReportSource = c;
                etat.Show();
                etat.AFFICHEUR_ETAT_CLT.PrintReport();
            }
            catch (Exception er) { }
            finally 
            {
                this.Cursor = Cursors.Default;
            }
        }
 
 }
 
    }

**********classe client*****

Code:

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using CLIENT_PRO_DLL;
using System.Data;
using System.Data.SqlClient;
 
namespace GESTION_GSM_ET_AUTRES
{
    public class GESTION : ICLIENT
    {
        CLIENT client = new CLIENT();
        #region ICLIENT Membres
 
        public CLIENT_INTERFACE CLIENT_P
        {
            get { return client; }
        }
 
        #endregion
    }
 
 
 
    class CLIENT :CLIENT_INTERFACE
    {
 
 
        #region CLIENT_INTERFACE Membres
 
        public string DELETE_CLIENT(string CODE)
        {
            try
            {
                SqlCommand cmd = new SqlCommand("DELETE * FROM CLIENT WHERE (CODE_CLIENT = @CODE_CLIENT)", PARAMETRES.con);
                cmd.Parameters.Add("@CODE_CLIENT", SqlDbType.Decimal).Value = CODE;
                cmd.ExecuteNonQuery();
                return "OK";
            }
            catch (Exception er)
            {
                return er.Message;
            }
        }
 
 
        public string INSERT_CLIENT(string CODE_CLIENT, string CATEGORIE_CLIENT, string NOM_CLIENT, string MATRICULE_FISC_CLIENT, string PORT_CLIENT, string EMAIL_CLIENT, string TEL_CLIENT, string FAX_CLIENT, string ADRESSE_CLIENT, bool EXO_CLIENT, bool MAJ_TVA_CLIENT, string TAUX_TVA_CLIENT, bool TIMBRE_CLIENT, string REMISE_CLIENT, string MONTANT_TOT_CLIENT, bool ETAT_CLIENT)
        {
            try
            {
               SqlCommand cmd = new SqlCommand("SELECT ISNULL(MAX(CODE_CLIENT), 0) + 1 FROM CLIENT", PARAMETRES.con);
               CODE_CLIENT = ((decimal)cmd.ExecuteScalar()).ToString();
 
               cmd = new SqlCommand("INSERT INTO CLIENT (CODE_CLIENT, CATEGORIE_CLIENT, NOM_CLIENT, MATRICULE_FISC_CLIENT,  PORT_CLIENT, EMAIL_CLIENT, TEL_CLIENT,FAX_CLIENT, ADRESSE_CLIENT, EXO_CLIENT, MAJ_TVA_CLIENT, TAUX_TVA_CLIENT, TIMBRE_CLIENT, REMISE_CLIENT, MONTANT_TOT_CLIENT, ETAT_CLIENT) VALUES (@CODE_CLIENT, @CATEGORIE_CLIENT, @NOM_CLIENT, @MATRICULE_FISC_CLIENT, @PORT_CLIENT, @EMAIL_CLIENT, @TEL_CLIENT,@FAX_CLIENT, @ADRESSE_CLIENT, @EXO_CLIENT, @MAJ_TVA_CLIENT, @TAUX_TVA_CLIENT, @TIMBRE_CLIENT, @REMISE_CLIENT, @MONTANT_TOT_CLIENT, @ETAT_CLIENT)", PARAMETRES.con);
                cmd.Parameters.Add("@CODE_CLIENT", SqlDbType.Decimal).Value = CODE_CLIENT.ToString();
                cmd.Parameters.Add("@CATEGORIE_CLIENT", SqlDbType.NVarChar).Value = CATEGORIE_CLIENT;
                cmd.Parameters.Add("@NOM_CLIENT", SqlDbType.NVarChar).Value = NOM_CLIENT;
                cmd.Parameters.Add("@MATRICULE_FISC_CLIENT", SqlDbType.NVarChar).Value = MATRICULE_FISC_CLIENT;
 
                cmd.Parameters.Add("@PORT_CLIENT", SqlDbType.NVarChar).Value = PORT_CLIENT;
                cmd.Parameters.Add("@EMAIL_CLIENT", SqlDbType.NVarChar).Value = EMAIL_CLIENT;
                cmd.Parameters.Add("@TEL_CLIENT", SqlDbType.NVarChar).Value = TEL_CLIENT;
                cmd.Parameters.Add("@FAX_CLIENT", SqlDbType.NVarChar).Value = FAX_CLIENT;
                cmd.Parameters.Add("@ADRESSE_CLIENT", SqlDbType.NVarChar).Value = ADRESSE_CLIENT;
                cmd.Parameters.Add("@EXO_CLIENT", SqlDbType.Bit).Value = EXO_CLIENT;
                cmd.Parameters.Add("@MAJ_TVA_CLIENT", SqlDbType.Bit).Value = MAJ_TVA_CLIENT;
                cmd.Parameters.Add("@TAUX_TVA_CLIENT", SqlDbType.Decimal).Value = TAUX_TVA_CLIENT.ToString();
                cmd.Parameters.Add("@TIMBRE_CLIENT", SqlDbType.Bit).Value = TIMBRE_CLIENT;
                cmd.Parameters.Add("@REMISE_CLIENT", SqlDbType.Decimal).Value = REMISE_CLIENT.ToString();
                cmd.Parameters.Add("@MONTANT_TOT_CLIENT", SqlDbType.Decimal).Value = MONTANT_TOT_CLIENT.ToString();
                cmd.Parameters.Add("@ETAT_CLIENT", SqlDbType.Bit).Value = ETAT_CLIENT;
                cmd.ExecuteNonQuery();
                return "OK";
            }
            catch (Exception er)
            {
                return er.Message;
            }
 
        }
 
        public DataTable LOAD_CLIENT(string CODE)
        {
            if (PARAMETRES.con.State == ConnectionState.Closed)
                PARAMETRES.con.Open();
            SqlDataAdapter da = new SqlDataAdapter("SELECT  * FROM CLIENT WHERE(CODE_CLIENT =@CODE_CLIENT)", PARAMETRES.con);
            da.SelectCommand.Parameters.Add("@CODE_CLIENT", SqlDbType.Decimal).Value = CODE;
            DataTable dt = new DataTable();
            da.FillSchema(dt, SchemaType.Source);
            da.Fill(dt);
            return dt;
        }
 
        public DataTable RECHERCHE_CLIENT(string param)
        {
            if (PARAMETRES.con.State == ConnectionState.Closed)
                PARAMETRES.con.Open();
            SqlDataAdapter da = new SqlDataAdapter("SELECT  CODE_CLIENT, CATEGORIE_CLIENT,  NOM_CLIENT, PORT_CLIENT, EMAIL_CLIENT, FAX_CLIENT, ADRESSE_CLIENT FROM CLIENT WHERE (CATEGORIE_CLIENT LIKE '%" + param + "%') OR  (NOM_CLIENT LIKE '%" + param + "%') OR ( PORT_CLIENT LIKE '%" + param + "%') OR (CATEGORIE_CLIENT LIKE '%" + param + "%') OR (CATEGORIE_CLIENT LIKE '%" + param + "%') OR (CATEGORIE_CLIENT LIKE '%" + param + "%')", PARAMETRES.con);
            DataTable dt = new DataTable();
            da.FillSchema(dt, SchemaType.Source);
            da.Fill(dt);
            return dt;
        }
 
        public DataTable SELECT_ALL_CLIENT()
        {
 
            if (PARAMETRES.con.State == ConnectionState.Closed)
                PARAMETRES.con.Open();
            SqlDataAdapter da = new SqlDataAdapter("SELECT CODE_CLIENT, NOM_CLIENT, PORT_CLIENT, EMAIL_CLIENT, FAX_CLIENT, ADRESSE_CLIENT FROM CLIENT", PARAMETRES.con);
            DataTable dt = new DataTable();
            da.FillSchema(dt, SchemaType.Source);
            da.Fill(dt);
            return dt;
        }
 
        public string UPDATE_CLIENT(string CODE_CLIENT, string CATEGORIE_CLIENT, string NOM_CLIENT, string MATRICULE_FISC_CLIENT, string PORT_CLIENT, string EMAIL_CLIENT, string TEL_CLIENT, string FAX_CLIENT, string ADRESSE_CLIENT, bool EXO_CLIENT, bool MAJ_TVA_CLIENT, string TAUX_TVA_CLIENT, bool TIMBRE_CLIENT, string REMISE_CLIENT, string MONTANT_TOT_CLIENT, bool ETAT_CLIENT)
        {
            try
            {
                SqlCommand cmd = new SqlCommand("UPDATE CLIENT SET CATEGORIE_CLIENT = @CATEGORIE_CLIENT, NOM_CLIENT = @NOM_CLIENT,MATRICULE_FISC_CLIENT = @MATRICULE_FISC_CLIENT,  PORT_CLIENT = @PORT_CLIENT,EMAIL_CLIENT = @EMAIL_CLIENT, TEL_CLIENT = @TEL_CLIENT, FAX_CLIENT = @FAX_CLIENT,ADRESSE_CLIENT = @ADRESSE_CLIENT, EXO_CLIENT = @EXO_CLIENT,MAJ_TVA_CLIENT = @MAJ_TVA_CLIENT, TAUX_TVA_CLIENT = @TAUX_TVA_CLIENT, TIMBRE_CLIENT = @TIMBRE_CLIENT, REMISE_CLIENT = @REMISE_CLIENT,MONTANT_TOT_CLIENT = @MONTANT_TOT_CLIENT, ETAT_CLIENT = @ETAT_CLIENT WHERE(CODE_CLIENT = @CODE_CLIENT)", PARAMETRES.con);
                cmd.Parameters.Add("@CODE_CLIENT", SqlDbType.Decimal).Value = CODE_CLIENT;
                cmd.Parameters.Add("@CATEGORIE_CLIENT", SqlDbType.NVarChar).Value = CATEGORIE_CLIENT;
 
                cmd.Parameters.Add("@NOM_CLIENT", SqlDbType.NVarChar).Value = NOM_CLIENT;
                cmd.Parameters.Add("@MATRICULE_FISC_CLIENT", SqlDbType.NVarChar).Value = MATRICULE_FISC_CLIENT;
 
                cmd.Parameters.Add("@PORT_CLIENT", SqlDbType.NVarChar).Value = PORT_CLIENT;
                cmd.Parameters.Add("@EMAIL_CLIENT", SqlDbType.NVarChar).Value = EMAIL_CLIENT;
                cmd.Parameters.Add("@TEL_CLIENT", SqlDbType.NVarChar).Value = TEL_CLIENT;
                cmd.Parameters.Add("@FAX_CLIENT", SqlDbType.NVarChar).Value = FAX_CLIENT;
                cmd.Parameters.Add("@ADRESSE_CLIENT", SqlDbType.NVarChar).Value = ADRESSE_CLIENT;
                cmd.Parameters.Add("@EXO_CLIENT", SqlDbType.Bit).Value = EXO_CLIENT;
                cmd.Parameters.Add("@MAJ_TVA_CLIENT", SqlDbType.Bit).Value = MAJ_TVA_CLIENT;
                cmd.Parameters.Add("@TAUX_TVA_CLIENT", SqlDbType.NVarChar).Value = TAUX_TVA_CLIENT;
                cmd.Parameters.Add("@TIMBRE_CLIENT", SqlDbType.Bit).Value = TIMBRE_CLIENT;
                cmd.Parameters.Add("@REMISE_CLIENT", SqlDbType.NVarChar).Value = REMISE_CLIENT;
                cmd.Parameters.Add("@MONTANT_TOT_CLIENT", SqlDbType.NVarChar).Value = MONTANT_TOT_CLIENT;
                cmd.Parameters.Add("@ETAT_CLIENT", SqlDbType.Bit).Value = ETAT_CLIENT;
                cmd.ExecuteNonQuery();
 
 
                cmd.ExecuteNonQuery();
                return "OK";
            }
            catch (Exception er)
            {
                return er.Message;
            }
        }
 
        #endregion
    }
}