public sealed partial class CellAppearance : Window
{
    public CellAppearance()
    {
        this.InitializeComponent();
        // bind flexgrid with DataSource
        var data = Customer.GetCustomerList(100);
        flexGrid1.ItemsSource = data;
        // Use CellFactory to change cell appearance
        flexGrid1.CellFactory = new MyCellFactory();
        flexGrid1.Columns[4].DataMap = new GridDataMap() { ItemsSource = Customer.GetCountries(), DisplayMemberPath = "Value", SelectedValuePath = "Key" };


        flexGrid1.Columns[2].Width = new GridLength(70);

        // Set currency format
        flexGrid1.Columns[2].Format = "C2";

        // Set number format
        flexGrid1.Columns[3].Format = "N1";

        //Set short date format
        flexGrid1.Columns[5].Format = "D";

        // Set time format
        flexGrid1.Columns[6].Format = "t";
    }

    public class MyCellFactory : GridCellFactory
    {
        public override void PrepareCell(GridCellType cellType, GridCellRange range, GridCellView cell, Thickness internalBorders)
        {
            if (cellType == GridCellType.Cell && range.Column == 3 && range.Row == 2)
            {
                // Changing Cell[2,3] BackColor, ForeColor and Font and Border 
                var cellValue = Grid[2, 3] as int?;
                if (cellValue.HasValue)
                {
                    cell.Background = new SolidColorBrush(Colors.Green);
                    cell.Foreground = new SolidColorBrush(Colors.Red);
                    cell.FontFamily = new FontFamily("verdana");
                    cell.FontStyle = FontStyle.Italic;
                    cell.FontSize = 18;
                    cell.BorderBrush = new SolidColorBrush(Colors.Red);
                    cell.BorderThickness = new Thickness(2, 2, 2, 2);
                }
            }
        }
        public override void BindCellContent(GridCellType cellType, GridCellRange range, FrameworkElement cellContent)
        {
            base.BindCellContent(cellType, range, cellContent);

            if (range.Column == 2 && range.Row == 2)
            {
                var label = cellContent as TextBlock;
                if (label != null)
                {

                    // Change Font
                    label.FontStyle = FontStyle.Italic;
                    label.FontSize = 18;
                    label.FontStretch = FontStretch.ExtraExpanded;
                    label.FontFamily = new FontFamily("Arial");

                    // Set Margin
                    label.Margin = new Thickness(10, 0, 0, 0);

                    // Wrap Text
                    label.TextWrapping = TextWrapping.WrapWholeWords;

                    // Display Trimmed Text
                    label.TextTrimming = TextTrimming.CharacterEllipsis;

                    // Align Text
                    label.TextAlignment = TextAlignment.Center;

                    // Text Effect
                    label.TextDecorations = TextDecorations.Strikethrough;

                }
            }
        }

    }
}