奇怪，Blend3 中怎么动态显示image图片呢？

namespace SilverlightApplication1{ public partial class PutCard : Page { public PutCard() { InitializeComponent();LoadPage(); } // Executes when the user navigates to this page.void LoadPage(){Image im=new Image();im.Source=new BitmapImage(new Uri("img/sha.jpg", UriKind.Relative)); im.Width=96;im.Height=134;im.Margin=new Thickness(0,338,136,8);//108,338,0,8} protected override void OnNavigatedTo(NavigationEventArgs e) { } }}

 

显示不出来，急死人