Silverlight 在Grid中动态增加控件并排版

Page.xaml

<UserControl x:Class="SilverlightApp.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="AntiqueWhite">
 
    </Grid>
</UserControl>

Page.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SilverlightApp
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

             Dtable();
        }

        protected void Dtable()
        {
            int numrows = 3;
            int numcells = 3;
            for (int j = 0; j < numrows; j++)
            {

                RowDefinition rd = new RowDefinition();
                LayoutRoot.RowDefinitions.Add(rd);

                ColumnDefinition cd = new ColumnDefinition();
                LayoutRoot.ColumnDefinitions.Add(cd);

                for (int i = 0; i < numcells; i++)
                {


                    TextBox tb = new TextBox();
                    tb.Width = 110;
                    tb.Height = 30;
                    tb.Text = "row   " + j.ToString() + ",   cell   " + i.ToString();

                    LayoutRoot.Children.Add(tb);
                    LayoutRoot.SetValue(Grid.ShowGridLinesProperty, true); //显示网格
                    tb.SetValue(Grid.ColumnProperty, i);
                    tb.SetValue(Grid.RowProperty, j);

                }

            }




        }
    }
}