I had the following code to create columns with texteditorprovider (multiline) at run time. However, I found that the cell will become single-line editor after an update to the cell and save (rebind). Could you please let me know how to make the maintain the multiline editor after the rebind? Thank you so much.

<Code for webdatagrid in aspx>

<ig:WebDataGrid ID="TableDetailGrid" runat="server" ClientIDMode="Static" Height="650px" Width="100%" EnableAjax ="True" EnableAjaxViewState="True" EnableViewState ="True" EnableDataViewState="True OnRowAdding="TableDetailGridRowAdding" OnRowUpdating="TableDetailGridRowUpdating" OnRowsDeleting="TableDetailGridRowDeleting" OnColumnSorted="TableDetailGridRowSorted" OnDataFiltering="TableDetailGridDataFiltering">

<Code to create columns during Page_Load in the code behind>

private void CreateColumns(DataTable theWholeTable, string tableName, int columnWidth)
        {
            //create editing core behaviour
            TableDetailGrid.Behaviors.CreateBehavior<Activation>();
            TableDetailGrid.Behaviors.Activation.Enabled = true;
            TableDetailGrid.Behaviors.CreateBehavior<EditingCore>();
            TableDetailGrid.Behaviors.EditingCore.AutoCRUD = false;
            TableDetailGrid.Behaviors.EditingCore.BatchUpdating = true;
            TableDetailGrid.Behaviors.EditingCore.EditingClientEvents.RowsDeleting = "RowDeleting_Handler";
            TableDetailGrid.Behaviors.EditingCore.EditingClientEvents.RowUpdated = "RowUpdated_Handler";
            TableDetailGrid.Behaviors.EditingCore.EditingClientEvents.CellValueChanged = "CellValueChanged_Handler";
            TableDetailGrid.Behaviors.EditingCore.EditingClientEvents.BatchUpdateUndone = "BatchUpdateUndone_Handler";
            TableDetailGrid.Behaviors.EditingCore.Enabled = true;
 
            //create CellEditing behaviour
            TableDetailGrid.Behaviors.EditingCore.Behaviors.CreateBehavior<CellEditing>();
            //TableDetailGrid.Behaviors.EditingCore.Behaviors.CellEditing.CellEditingClientEvents.EnteringEditMode =
            //    "CellEditing_EnteringEditMode_Handler";
 
            //create RowAdding behaviour
            TableDetailGrid.Behaviors.EditingCore.Behaviors.Add(
            TableDetailGrid.Behaviors.EditingCore.Behaviors.CreateBehavior<RowAdding>());
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.EditModeActions.EnableOnActive = true;
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.EditModeActions.EnableOnKeyPress = true;
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.EditModeActions.MouseClick = EditMouseClickAction.Single;
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.Enabled = true;
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.Alignment = AddNewRowAlignment.Top;
            TableDetailGrid.Behaviors.EditingCore.RowAdding += new Infragistics.Web.UI.GridControls.RowAddingHandler(TableDetailGridRowAdding);
      
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.AddNewRowClientEvents.EnteringEditMode = "AddRow_EnteringEditMode_CancelEventIfReadOnly";
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowAdding.AddNewRowClientEvents.ExitedEditMode = "AddRow_ExitEditMode_Handlder";
            
            //create RowDeleting behaviour
            TableDetailGrid.Behaviors.EditingCore.Behaviors.Add(
                TableDetailGrid.Behaviors.EditingCore.Behaviors.CreateBehavior<RowDeleting>());
            TableDetailGrid.Behaviors.EditingCore.Behaviors.RowDeleting.Enabled = true;
            
 
            //get readonly column names
            var readOnlyColumnNames = GetReadOnlyColumnNamesByTable(tableName);
 
 
            var textprovider = new TextEditorProvider(ID = "MultilineTextProvider");
            textprovider.EditorControl.TextMode = TextBoxMode.MultiLine;
            TableDetailGrid.EditorProviders.Add(textprovider);
 
            foreach (DataColumn column in theWholeTable.Columns)
            {
                var theColumn = new BoundDataField(true);
                theColumn.Key = column.ColumnName;
                theColumn.Header.Text = column.Caption;
                theColumn.DataFieldName = column.ColumnName;
                theColumn.DataType = "System.String";
                theColumn.Width = columnWidth;
                theColumn.EnableMultiline = true;
                TableDetailGrid.Columns.Add(theColumn);
 
                //create column settings
                var columnSetting = new EditingColumnSetting();
 
                columnSetting.ColumnKey = column.ColumnName;
                columnSetting.ReadOnly =
                    (readOnlyColumnNames.Contains(column.ColumnName, StringComparer.InvariantCultureIgnoreCase) ||
                     string.Equals(column.ColumnName, Session["PrimaryKeyName"].ToString(), StringComparison.InvariantCultureIgnoreCase));
                
                //if (string.Equals(tableName, "dbo.CustomColumn", StringComparison.InvariantCultureIgnoreCase) &&
                //    string.Equals(column.ColumnName, "SourceColumn", StringComparison.InvariantCultureIgnoreCase))
                //{
                if (!columnSetting.ReadOnly && column.DataType == typeof(System.String))
                {
                    columnSetting.EditorID = textprovider.ID;
                }
                    
                //}
 
                TableDetailGrid.Behaviors.EditingCore.Behaviors.CellEditing.ColumnSettings.Add(columnSetting);
            }
        }

<Code rebind datagrid after the save>

private void RebindGrid(string tableName)
        {
            //get the table again and rebind the table to grid after the update
            DataTable tableSource = new DataTable();
            tableSource = GetTableRows(tableName);
            TableDetailGrid.ClearDataSource();
            ClearFilterSetting();
            TableDetailGrid.DataKeyFields = Session["PrimaryKeyName"].ToString();
            TableDetailGrid.DataSource = tableSource;
            TableDetailGrid.DataBind();
            TableDetailGrid.RequestFullAsyncRender();
            Session["tableContent"] = TableDetailGrid.DataSource;
        }