How to fill a rectangle with an image that is coming from a bound listbox on event fire in WP7 - windows-phone-7

Question

i want to create a greeting card maker app for WP7, when a user double taps an image from a listbox, I want that selected image to fill a rectangle on the same page.
Im passing 50 images into the list box like this:
public GCM()
{
InitializeComponent();
var articles = new List<Article>();
for (byte i = 1; i <= 20; i++)
{
Article article = new Article() { Name = "name"+i, ImagePath = "Assets/Images/Backgrounds/"+i+".jpg" };
articles.Add(article);
}
listBox1.DataContext = articles;
}
and its working fine, now heres an xml snippet:
<Rectangle Fill="#FFF4F4F5" Margin="28,24,30,148" Stroke="Black" Name="rect1" />
................(more code here).........................
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="10" >
<Image Name="bgs" Source="{Binding ImagePath}" Height="90" Width="90" DoubleTap="Load_BG" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
how can i fill the rectangle with the tapped image? this code (below) sets the string null everytime, no matter which image i select, although to my knowledge each has a different name and it should give different names for different images. I will use the name of the image to fill the rectangle. What am i doing wrong?
private void Load_BG(object sender, System.Windows.Input.GestureEventArgs e)
{
string abc = sender.GetType().Name;
}
Please excuse me if the solution is obvious..this is my first app ever. Thank you!

Answer 1

sender parameter should contains the control that triggered the event, in this case Image control. Try to cast it to Image type, then you can get the information you needed from Source property :
private void Load_BG(object sender, System.Windows.Input.GestureEventArgs e)
{
Image img = (Image)sender;
//do something with img.Source here
}

Answer 2

so heres the solution, it works now :)
private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var img = listBox1.SelectedItem as Article;
ImageBrush imgBrush = new ImageBrush();
imgBrush.ImageSource = new BitmapImage(new Uri(img.ImagePath, UriKind.RelativeOrAbsolute));
rect1.Fill = imgBrush;
}