背景图像更改为默认的WP7

Question

在我的Windows Phone 7应用程序中，我创建了一个按钮来更改默认背景图像，用户可以在应用程序上拥有自己的自定义皮肤。它工作完美。但是，当用户退出应用程序并重新启动应用程序时，应用程序的背景图像将更改为默认值。但我需要的是，应用程序应该有用户选择的最后一个图像，即使启动不了。的时代。谁能帮我这个？预先感谢您的辛勤工作！

private void BackgroundBrowserIcon_MouseEnter(object sender, MouseEventArgs e) 
    { 
     var PhotoChooser = new PhotoChooserTask(); 
     PhotoChooser.Completed += new EventHandler<PhotoResult>(PhotoChooser_Completed); 
     PhotoChooser.Show(); 
    } 

    void PhotoChooser_Completed(object sender, PhotoResult e) 
    { 
     { 
      if (e.TaskResult == TaskResult.OK) 
      { 
       System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage(); 
       bmp.SetSource(e.ChosenPhoto); 
       var app = Application.Current as App; 

       if (app == null) 
        return; 
       var imageBrush = new ImageBrush { ImageSource = bmp, Opacity = 1.0d }; 
       this.LayoutRoot.Background = imageBrush; 
       app.backchanged = true; 
       app.appbrush = imageBrush; 
      } 
     } 
    } 

Answer 1

您是否使用IsolatedStorageSettings存储上次选择的照片，然后将其加载到应用程序启动？

更新： 退房这篇文章，因为它解释如何编写你希望完成什么：http://www.windowsphonegeek.com/tips/All-about-WP7-Isolated-Storage---Read-and-Save-Captured-Image

Answer 2

看看这个article学习如何储存IsolatedStorageSettings。

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 System.IO.IsolatedStorage; 


namespace F5debugWp7IsolatedStorage 
{ 
    public partial class MainPage : PhoneApplicationPage 
    { 
    // Constructor 
    public MainPage() 
    { 
     InitializeComponent(); 
    } 

    private void button3_Click(object sender, RoutedEventArgs e) 
    { 
     IsolatedStorageSettings ISSetting = IsolatedStorageSettings.ApplicationSettings; 

     if (!ISSetting.Contains("DataKey")) 
     { 
      ISSetting.Add("DataKey", txtSaveData.Text); 
     } 
     else 
     { 
      ISSetting["DataKey"] = txtSaveData.Text; 
     } 
     ISSetting.Save(); 
    } 
} 

}