SilverLight 中ListBox获取选中项

 private void TongZhiGG_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ListBoxItem _selectedItem = (ListBoxItem)(TongZhiGG.ItemContainerGenerator.ContainerFromItem(this.TongZhiGG.SelectedItem));
           
            TextBlock myTxt = FindFirstVisualChild<TextBlock>(_selectedItem, "MyOID");
            string Select_value = myTxt.Text.ToString();
            //MessageBox.Show(Select_value.ToString());
            Aggregator.SendMessage<MessageToKranthi, string>(
                 new MessageToKranthi { Payload = "页面跳转"+Select_value}
             );
        }
        #endregion

        public T FindFirstVisualChild<T>(DependencyObject obj, string childName) where T : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                if (child != null && child is T && child.GetValue(NameProperty).ToString() == childName)
                {
                    return (T)child;    
                }
                else
                {
                    T childOfChild = FindFirstVisualChild<T>(child, childName);
                    if (childOfChild != null)
                    {
                        return childOfChild;
                    }
                }
            }
            return null;
        }

或者 取用WCF

 private void TongZhiGG_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
Info i = (Info)this.TongZhiGG.SelectedItem;
            string a = i.A_InfoOID.ToString(); 
}