excel in silverlight4

Question

I am makimg the project as coding in c# and designing in 

silverlight4...

here is one requirement of making excel sheet in silverlight4..

this is a coding i have done in designing page..

<UserControl x:Class="SilverlightExcel.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d"

    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">

        <Button Content="Create XLS" Width="100" Height="30" 

Click="Button_Click" />

    </Grid>

</UserControl>

***********************************************************************

**********************

 

and this is the coding in  .cs page

 

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;

using System.Windows.Interop;

namespace SilverlightExcel

{

    public partial class MainPage : UserControl

    {

        public MainPage()

        {

            InitializeComponent();

        }

        private void Button_Click(object sender, RoutedEventArgs e)

        {

            dynamic excel = 

ComAutomationFactory.CreateObject("Excel.Application");

            excel.Visible = true;

            dynamic workbook = excel.workbooks;

            workbook.Add();

            dynamic sheet = excel.ActiveSheet;

            dynamic range;

            range = sheet.Range("A1");

            range.Value = "Hello from Silverlight";

            range = sheet.Range("A2");

            range.Value = "100";

            range = sheet.Range("A3");

            range.Value = "50";

            range = sheet.Range("A4");

            range.Formula = "=@Sum(A2..A3)";

            range.Calculate();

        }

    }

}

 

 

Where I am doing the mistake ....when i build this project...it 

succeeded...but at run time it is not showing anything...

 

please help me..

as soon as possible..

thanks to all in advance