Hi Bryan,

There's no easy way to associate the selected state of a row with a CheckBox. Once a cell goes into edit mode in the grid (which is must do in order to check/uncheck a checkbox), any selection will be lost.So what you need to do here is simulate selection without using actual selection.

What I would do is keep my own List<UltraGridRow> of the "selected" rows. Every time the checkbox changes, you update the list.

Here's some sample code:

       
        private List<UltraGridRow> selectedRows = new List<UltraGridRow>();
        private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
        {
            UltraGridLayout layout = e.Layout;
            UltraGridOverride ov = layout.Override;
            UltraGridBand band = layout.Bands[0];


            // Turn off row selection.
            ov.SelectTypeRow = SelectType.None;

            // Add an unbound CheckBox (coolean) column to the grid to handle selection.
            if (false == band.Columns.Exists("Selected"))
            {
                UltraGridColumn selectedColumn = band.Columns.Add("Selected");
                selectedColumn.DataType = typeof(bool);
                selectedColumn.Header.VisiblePosition = 0;
            }

            // Created an appearance for the selected row(s).
            if (false == layout.Appearances.Exists("Selected"))
            {
                Infragistics.Win.Appearance selectedRowAppearance = layout.Appearances.Add("Selected");
                selectedRowAppearance.BackColor = SystemColors.Highlight;
                selectedRowAppearance.ForeColor = SystemColors.HighlightText;               
            }
        }

        private void ultraGrid1_CellChange(object sender, CellEventArgs e)
        {
            // Check for changes in the "Selected" column. 
            if ("Selected" == e.Cell.Column.Key)
            {
                // If the checkbox is checked, add the row to our selected rows list. 
                // If the checkbox is unchecked, remove it from the list. 
                UltraGridRow row = e.Cell.Row;
                bool isSelected = bool.Parse(e.Cell.Text);
                if (isSelected)
                    this.selectedRows.Add(row);
                else
                    this.selectedRows.Remove(row);

                // Update the appearance of the row based on the state of the "Selected" checkbox.
                UpdateSelectedRowAppearance(row);
            }
        }

        private void ultraGrid1_InitializeRow(object sender, InitializeRowEventArgs e)
        {
            // Update the appearance of the row based on the state of the "Selected" checkbox.             
            UltraGridRow row = e.Row;
            UpdateSelectedRowAppearance(row);
        }

        // Updates the appearance of the row based on whether or not the "Selected" checkbox is checked. 
        private static void UpdateSelectedRowAppearance(UltraGridRow row)
        {
            if (true == row.Cells.Exists("Selected"))
            {
                bool isSelected = bool.Parse(row.Cells["Selected"].Text);
                if (isSelected)
                    row.Appearance = row.Band.Layout.Appearances["Selected"];
                else
                    row.Appearance = null;
            }
        }