Windows Phone image downloading and showing progress-bar

In this blog we will explore how to show download percentage and processing when we start downloading image in Windows Phone 7 application development. i used the image available at  

Image location

 it takes some time to download and we can see how it works.  for this purmose make a project with the name ImageDownloader and have code at MainPage.xaml.cs

<phone:PhoneApplicationPage 
    x:Class="ImageDownload.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="Download Progress" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Demo" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <StackPanel x:Name="stackPanel1" HorizontalAlignment="Center" VerticalAlignment="Center">
                <TextBlock x:Name="downloadPercentage" HorizontalAlignment="Center" VerticalAlignment="Center" />
                <ProgressBar x:Name="progressPercentage" Width="350" Height="25" Minimum="0" Maximum="100" />
                <ProgressBar x:Name="processing" IsIndeterminate="True" Width="350" Height="25" />
            </StackPanel>
            <Border BorderThickness="2" BorderBrush="Silver">
                <Image x:Name="image1">
                    <Image.RenderTransform>
                        <TransformGroup>
                            <ScaleTransform x:Name="scale" />
                            <TranslateTransform x:Name="translate" />
                        </TransformGroup>
                    </Image.RenderTransform>
                </Image>
            </Border>
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>

Now have code at MainPage.xaml.cs as follows

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 Microsoft.Phone.Controls;
using System.Windows.Media.Imaging;

namespace ImageDownload
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();
            string source = "http://upload.wikimedia.org/wikipedia/commons/9/96/Naini_Lake_%28After%29.jpg";
            BitmapImage bitmapImage = new BitmapImage(new Uri(source, UriKind.Absolute));
            bitmapImage.DownloadProgress += new EventHandler<DownloadProgressEventArgs>(bitmapImage_DownloadProgress);
            image1.Source = bitmapImage;
        }
        void bitmapImage_DownloadProgress(object sender, DownloadProgressEventArgs e)
        {
            progressPercentage.Value = e.Progress;
            downloadPercentage.Text = "Downloading.... " + e.Progress.ToString() + "%";
        }
    }
}

You can see the output after running the project at emulator

you can also download the code aafter clicking ImageDownloader