Silverlight DataGrid with Dynamic Multiple Row Columns in Header

using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;

namespace DynamicMutipleRowHeaderSilverlighGrid
{
    public partial class Page : UserControl
    {
        DataGrid grdData = new DataGrid() { AutoGenerateColumns = false };
        bool bGridInitialized = false;
        List<RowHeader> Headers = null;

        public Page()
        {
            InitializeComponent();
            InitUI();
        }

        void InitUI()
        {
            DynamicHeaders dynHead = new DynamicHeaders(SalseData.GetSalseDataHeader());
            Headers = dynHead.ParseHeader();

            grdData.LayoutUpdated += new EventHandler(grdData_LayoutUpdated);

            String[] ColHeaders = SalseData.GetSalseDataColumnHeader().Split(',');
            foreach (String col in ColHeaders)
            {
                String[] colHeader = col.Split('|');
                grdData.Columns.Add(new DataGridTextColumn { Header = colHeader[0], Binding = new System.Windows.Data.Binding(colHeader[1]), IsReadOnly = true });
            }
            grdData.ItemsSource = SalseData.GetSalseData();
            
            for(int i =0; i<Headers.Count+2; i++)
                LayoutRoot.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0, GridUnitType.Auto) });
            
            LayoutRoot.Children.Add(grdData);
        }

        void grdData_LayoutUpdated(object sender, EventArgs e)
        {
            if (bGridInitialized)
                return;
            for (int i = 0; i < grdData.Columns.Count; i++)
            {
                DataGridColumn dgc = grdData.Columns[i];
                LayoutRoot.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(dgc.ActualWidth, GridUnitType.Auto) });
            }
            for (int i = 0; i < Headers.Count; i++)
            {
                int ColPos = 0;
                for (int j = 0; j < Headers[i].RowHeaderCells.Count; j++)
                {
                    DynamicHeaderCell dhc = Headers[i].RowHeaderCells[j];
                    AddHeaderTextBlock(LayoutRoot, dhc.Header, i, ColPos, dhc.RowSpan, dhc.ColSpan);
                    ColPos += dhc.ColSpan;
                }
            }

            String[] Footer = SalseData.GetSalseDataFooter().Split('|');
            for(int i =0; i<Footer.Length; i++)
                AddHeaderTextBlock(LayoutRoot, Footer[i], Headers.Count + 1, i, 1, 1);

            Grid.SetRow(grdData, Headers.Count);
            Grid.SetColumnSpan(grdData, grdData.Columns.Count);
            grdData.HeadersVisibility = DataGridHeadersVisibility.None;
            bGridInitialized = true;
        }

        void AddHeaderTextBlock(Grid container, String header, int Row, int Col, int RowSpan, int ColSpan)
        {
            if (RowSpan > Headers.Count - Row)
                RowSpan = Headers.Count - Row;
            if (RowSpan <= 0)
                RowSpan = 1;
            Border b = new Border();
            if (Col + ColSpan == grdData.Columns.Count && Row != Headers.Count + 1)
                b.BorderThickness = new Thickness(1, 1, 1, 0);
            else if (Row != Headers.Count + 1)
                b.BorderThickness = new Thickness(1, 1, 0, 0);
            else if (Col + ColSpan == grdData.Columns.Count && Row == Headers.Count + 1)
                b.BorderThickness = new Thickness(1, 0, 1, 1);
            else
                b.BorderThickness = new Thickness(1, 0, 0, 1);

            b.BorderBrush = grdData.BorderBrush;

            TextBlock tb = new TextBlock();
            tb.Text = header;
            tb.HorizontalAlignment = HorizontalAlignment.Center;
            tb.VerticalAlignment = VerticalAlignment.Center;


            LayoutRoot.Children.Add(b);
            Grid.SetRow(b, Row);
            Grid.SetColumn(b, Col);
            Grid.SetRowSpan(b, RowSpan);
            Grid.SetColumnSpan(b, ColSpan);

            LayoutRoot.Children.Add(tb);
            Grid.SetRow(tb, Row);
            Grid.SetColumn(tb, Col);
            Grid.SetRowSpan(tb, RowSpan);
            Grid.SetColumnSpan(tb, ColSpan);
        }

    }
}