wp如何拍照并擷取照片

 
 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;         
      
 //引用         
      
 using System.Windows.Media.Imaging;         
      
 using Microsoft.Phone.Tasks;         
          
 namespace CameraShoot         
      
 {         
      
     public partial class MainPage : PhoneApplicationPage         
      
     {         
      
         //相機捕獲任務執行個體         
      
         CameraCaptureTask cameraCT = new CameraCaptureTask();         
      
         // 構造函數         
      
         public MainPage()         
      
         {         
      
             InitializeComponent();         
      
             //手機拍照功能完成後調用         
      
             cameraCT.Completed += new EventHandler<PhotoResult>(cameraCT_Completed);         
      
         }         
      
         //重寫觸摸屏事件         
      
         protected override void OnManipulationStarted(ManipulationStartedEventArgs e)         
      
         {         
      
             if (e.OriginalSource==txtName)         
      
             {         
      
                 //調用相機         
      
                 cameraCT.Show();         
      
             }         
      
             //觸摸事件完成          
      
             e.Complete();         
      
             //不在向父元素傳遞         
      
             e.Handled = true;         
      
             base.OnManipulationStarted(e);         
      
         }         
      
         //完成         
      
         void cameraCT_Completed(object sender, PhotoResult e)         
      
         {         
      
             if (e.TaskResult==TaskResult.OK)         
      
             {         
      
                 BitmapImage bmp = new BitmapImage();         
      
                 //擷取包含檔案流的和Source不同         
      
                 bmp.SetSource(e.ChosenPhoto);         
      
                 //設定圖檔源         
      
                 img.Source = bmp;         
      
                 txtName.Text = e.OriginalFileName;         
      
             }         
      
         }         
      
     }         
      
 }