windows phone 選擇照片

App.cs

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.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;

namespace PhotoApp
{
    public class GlobalData
    {
        public BitmapImage bitmapImage;
    }

    public partial class App : Application
    {
        public static GlobalData globalData;

        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            globalData = new GlobalData();
            globalData.bitmapImage = new BitmapImage();

            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

......

MainPage.xaml

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 Microsoft.Phone.Tasks;
using System.Windows.Navigation;

namespace PhotoApp
{
    public partial class MainPage : PhoneApplicationPage
    {
        PhotoChooserTask photoChooserTask;

        // Constructor
        public MainPage()
        {
            InitializeComponent();
            photoChooserTask = new PhotoChooserTask();
            photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
        }

        void photoChooserTask_Completed(object sender, PhotoResult e)
        {
            if (e.TaskResult == TaskResult.OK)
            {
                App.globalData.bitmapImage.SetSource(e.ChosenPhoto);
                //NavigationService.Navigate(new Uri("/PhotoPage.xaml", UriKind.Relative));
                NavigationService.Navigated += new NavigatedEventHandler(navigateCompleted);
            }
        }

        void navigateCompleted(object sender, EventArgs e)
        {
            //Do the delayed navigation from the main page
            this.NavigationService.Navigate(new Uri("/PhotoPage.xaml", UriKind.Relative));
            NavigationService.Navigated -= new NavigatedEventHandler(navigateCompleted);
        }

        /// <summary>
        /// 選照片
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            photoChooserTask.Show();
        }

    }
}

PhotoPage.xaml

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;

namespace PhotoApp
{
    public partial class PhotoPage : PhoneApplicationPage
    {
        public PhotoPage()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);
            image1.Source = App.globalData.bitmapImage;
        }
    }
}