Thanks for attached code, but I was not able to find the reasons. If you are able please upload whole sample that I could build and run at my machine. I`d like to debug it. If you think that it is not possible, then  my suggestion is to arrange a live session. By this way I`ll take a look  and debug this issue at your machine. I`m available from Monday till Friday between 06:00 - 14:00 UTC.

Please let me know if you have any questions.

Regards

This is the code of my form :

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 Librairie;
using LibrairieControles;
using Infragistics.Win.UltraWinGrid;
using Pegasus.IHM.ComboboxControler;
using Infragistics.Win;

namespace Sav
{
        public partial class Form_Param_Region : FormBase
        {
                private string Action;
                private REGION selectedRegion;

                #region Appel du formulaire
                private static REGION Run(IWin32Window wnd, string action)
                {
                        var formulaire = new Form_Param_Region (action);

                        try
                        {
                                formulaire.ShowDialog (wnd);
                                return formulaire.selectedRegion;

                        }
                        catch (Exception ex)
                        {
                                formulaire.ExceptionShow (ex);
                                return null;
                        }
                        finally
                        {
                                formulaire.Dispose ();
                        }
                }

                public static void editRegion (IWin32Window wnd)
                {
                    Run(wnd, "edit");
                }

                public static REGION consultRegion (IWin32Window wnd)
                {
                    return Run(wnd, "consult");
                }
                #endregion

                #region GridHeader
                private class GridHeaders
                {
                        public const string IdRegion = "IdRegion";
                        public const string TYPE_REGION = "TYPE_REGION";
                        public const string LibelleRegion = "LibelleRegion";
                }
                #endregion

                public Form_Param_Region (string action)
                {
                        Action = action;

                        InitializeComponent ();

                        if (Action == "edit")
                        {
                                ultraGrid1.SetColumnHeader (new Dictionary<String, String> () {
                                { GridHeaders.IdRegion,      Pegasus.IHM.Resources.GridHeaders.IDS_GridHeader_Code},
                                { GridHeaders.TYPE_REGION,    Pegasus.IHM.Resources.GridHeaders.IDS_GridHeader_Type},
                                { GridHeaders.LibelleRegion,    Pegasus.IHM.Resources.GridHeaders.IDS_GridHeader_Libelle},
                                });

                                ultraGrid1.DisplayLayout.Bands[0].Columns[GridHeaders.IdRegion].CellActivation = Activation.Disabled;
                                ControleurTYPE_REGION.AddValueList2ultraGrid (ultraGrid1);
                        }
                        else
                        {
                                ultraGrid1.SetColumnHeader (new Dictionary<String, String> () {
                                { GridHeaders.TYPE_REGION,    Pegasus.IHM.Resources.GridHeaders.IDS_GridHeader_Type},
                                { GridHeaders.LibelleRegion,    Pegasus.IHM.Resources.GridHeaders.IDS_GridHeader_Libelle},
                                });

                                ultraGrid1.DisplayLayout.Override.AllowUpdate = DefaultableBoolean.False;
                                ControleurTYPE_REGION.AddValueList2ultraGrid (ultraGrid1);
                        }

                        bindingSource1.DataSource = Globals.pegasusContexte.REGION;
                }

                private void okButton_Click (object sender, EventArgs e)
                {
                       Valider();
                }

                private void ultraGrid1_DoubleClickRow(object sender, DoubleClickRowEventArgs e)
                {
                    Valider();
                    DialogResult = DialogResult.OK;
                }

                private void ultraGrid1_BeforeRowsDeleted (object sender, BeforeRowsDeletedEventArgs e)
                {
                        e.DisplayPromptMsg = false;

                        if (Action == "edit")
                        {
                                e.DisplayPromptMsg = false;

                                REGION region = ultraGrid1.ActiveRow.ListObject as REGION;

                                if (region.IsUsed (Pegasus.BL.Globals.Globals.UserConnect.Serveur, Pegasus.BL.Globals.Globals.UserConnect.Instance, Pegasus.BL.Globals.Globals.UserConnect.TypeBase))
                                {
                                        this.Information (Properties.Resources.IDS_Param_SuppressionRegionImpossible);
                                        e.Cancel = true;
                                }
                                else
                                {
                                        if (!this.Confirmation (Properties.Resources.IDS_Param_ConfirmationSuppressionRegion))
                                        {
                                                e.Cancel = true;
                                        }
                                }
                        }
                        else e.Cancel = true;
                }

                private void Valider()
                {
                    if (Action == "edit")
                    {
                            Globals.pegasusContexte.SaveChanges ();
                    }
                    else
                    {
                            selectedRegion = ultraGrid1.ActiveRow.ListObject as REGION;
                    }
                }
        }
}

I try to put your proposal after : bindingSource1.DataSource = Globals.pegasusContexte.REGION; ... without success

When I see data in the UltraWinGrid Designer, in Control Settings, I select "Modified Only", I see DisplayLayout :

I check :

 - DataSource : bindingSource1

 - AutoFitStyle : ExtendLastColumn

 - Bands : 0 - REGION

               1 - REGION_CP

               2 - REGION_DEPARTEMENT

This form is a parameter form. I need to update, delete or create row in this Grid.

If I hide bands 1 and 2, when I create row in band 0, when I save data, I have an error message. I think, the software try to save other data (REGION_CP and REGION_DEPARTEMENT), without success...

Thanks a lot for your help

Best Regards

Hello,

LEBARD vincent said:

I try to put this property, but it's the same problem. I have, again, many bands.

It is difficult to guess the reasons for this behavior.  I suppose that something override this settings. Maybe something into your code. Are you using Save/Load layouts methods ? Are you able to send us small sample with this issue ? I`ll be glad to research it for you.

Let me know if you have any questions.

Regards