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