#眉標=Silverlight 4、Elevated Trust、OOB
#副標=Silverlight最新技術與應用(2)
#大標=體驗Silverlight 4在前端介面上的新應用
#作者=文／圖 董大偉

===<反灰>=============
//CaptureSource物件
CaptureSource CaptureSource;
//影像儲存用集合
System.Collections.ObjectModel.ObservableCollection<System.Windows.Media.Imaging.WriteableBitmap> images = new System.Collections.ObjectModel.ObservableCollection<System.Windows.Media.Imaging.WriteableBitmap>();
//按下開始鈕
private void Button1_Click(object sender, RoutedEventArgs e)
{
  //判斷目前啟動狀態
  if (!CaptureDeviceConfiguration.AllowedDeviceAccess)
  {
  //透過RequestDeviceAccess要求使用者允許使用WebCam(這時畫面上會跳出Yes/No詢問視窗)
    if (!CaptureDeviceConfiguration.RequestDeviceAccess())
    {
  //失敗
    MessageBox.Show("存取設備失敗!");
     return;
    }
   }
  //建立CaptureSource
  CaptureSource = new CaptureSource();
  //hook截取影像事件
  CaptureSource.CaptureImageCompleted += new EventHandler<CaptureImageCompletedEventArgs>(CaptureSource_CaptureImageCompleted);
  //設定影像擷取時的Binding
  CaptureImages.ItemsSource = images;
  //VideoBrush
  VideoBrush vb = new VideoBrush();
  //將Grid的背景設為VideoBrush
  Grid1.Background = vb;
  //將VideoBrush的資料來源設為CaptureSource
  vb.SetSource(CaptureSource);
  //開始截取
  CaptureSource.Start();
  //按鈕隱藏
  Button1.Visibility = System.Windows.Visibility.Collapsed;
}

==<end>==============




===<反灰>=============
//擷取影像鈕
private void button3_Click(object sender, RoutedEventArgs e)
{
　//擷取影像
　CaptureSource.CaptureImageAsync();
}
　　
==<end>==============




===<反灰>=============
//hook截取影像事件
　CaptureSource.CaptureImageCompleted += new EventHandler<CaptureImageCompletedEventArgs>(CaptureSource_CaptureImageCompleted);
==<end>==============




===<反灰>=============
//擷取影像完成
void CaptureSource_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
　//將影像加入
　images.Add(e.Result); 
}
==<end>==============





===<反灰>=============
WebCam
public class MemoryAudioSink : AudioSink
{
  //存放Audio的format
  private MemoryStream _stream;
  //紀錄與回傳格式
  private AudioFormat _format;
  //回傳AudioStream
  public Stream AudioStream {
    get { return _stream; }
  }
  //回傳當前格式
  public AudioFormat CurrentFormat { get { return _format; } }
  //開始擷取
  protected override void OnCaptureStarted() 
  {  //…略… 
　}
  //擷取完畢
  protected override void OnCaptureStopped()
  {  //…略… 
　}
  //當音訊格式改變
  protected override void OnFormatChange(AudioFormat audioFormat) 
{  //…略…
}
  //當音訊資料傳入
  protected override void OnSamples(long sampleTime, long sampleDuration, byte[] sampleData) 
　{ //…略…
　}
}
==<end>==============





===<反灰>=============
//Audio recorder
AudioSink = new MemoryAudioSink();
AudioSink.CaptureSource = CaptureSource;
====<end>==============



===<反灰>=============
//停止鈕
private void buttonStop_Click(object sender, RoutedEventArgs e)
{
　//存檔對話視窗
　SaveFileDialog saveFileDialog = new SaveFileDialog() { Filter = "音訊檔案(*.wav)|*.wav" };
　//STOP
　CaptureSource.Stop();
　CaptureSource.CaptureImageCompleted -= CaptureSource_CaptureImageCompleted;
　//顯示對話視窗
　if (saveFileDialog.ShowDialog() == true)
　{
　　//從使用者選擇的儲存檔案視窗開啟檔案
　　Stream FileStream = saveFileDialog.OpenFile();
　　//儲存檔案(AudioSink.AudioStream為音訊內容)
　　WavHelper.SaveWavFile(AudioSink.AudioStream, FileStream, AudioSink.CurrentFormat);
　　//關檔
　　FileStream.Close();
　　//Message
　　MessageBox.Show("錄音已存檔至[" + saveFileDialog.SafeFileName + "]");
　}
　//按鈕出現
　Button1.Visibility = System.Windows.Visibility.Visible;
}
==<end>==============



=======<反灰>=============
private void textBox1_Drag(object sender, DragEventArgs e)
{
　if (e.Data == null) return;
　//從e.Data取得資料物件
　IDataObject DataObject = e.Data as IDataObject;
　//取得檔案(集合，可能有多個檔案)
　System.IO.FileInfo[] files = (System.IO.FileInfo[])DataObject.GetData(DataFormats.FileDrop);

　//列舉每一個檔案
　foreach (System.IO.FileInfo item in files)
　{
   //如果檔名為*.txt
　　if (item.Extension.Equals(".txt"))
　　{
   //則開檔
     using (System.IO.Stream stream = item.OpenRead())
     {
　　　using (System.IO.StreamReader reader = new System.IO.StreamReader(stream, System.Text.UnicodeEncoding.Unicode  ))
　　　{
     //讀取並填入TextBox中
       this.textBox1.Text = reader.ReadToEnd();
　　　}
     }
     return; //僅處理第一個
　　}
   else
   {
　　MessageBox.Show("請拖曳文字檔!");
   }
　}
}

======<end>==============




===<反灰>=============

private void image1_Drop(object sender, DragEventArgs e)
{
　if (e.Data == null)
　　return;
　//從e.Data取得資料物件
　IDataObject DataObject = e.Data as IDataObject;
　System.IO.FileInfo[] files = (System.IO.FileInfo[])DataObject.GetData(DataFormats.FileDrop);
　//取第一個
　System.IO.FileInfo file = files[0];
　try
　{
　　//讀取檔案
　　using (var stream = file.OpenRead())
　　{//取得檔案資料
　　　var imageSource = new System.Windows.Media.Imaging.BitmapImage();
　　　imageSource.SetSource(stream);
     //設為來源
　　　image1.Source = imageSource;
     }
　}
　catch (Exception) //如果發生錯誤
　{
　MessageBox.Show("請拖曳圖片檔!");
　}
}
==<end>==============





===<反灰>=============

private void mediaElement1_Drop(object sender, DragEventArgs e)
{
　if (e.Data == null) return;
　//從e.Data取得資料物件
　IDataObject DataObject = e.Data as IDataObject;
　System.IO.FileInfo[] files = (System.IO.FileInfo[])DataObject.GetData(DataFormats.FileDrop);
　//取第一個
　System.IO.FileInfo file = files[0];
　try
　{
　　var stream = file.OpenRead();
　　//直接把file stream透過SetSource設為mediaElement1的影片來源
　　this.mediaElement1.SetSource(stream);
　　mediaElement1.AutoPlay = true;
　　mediaElement1.Play();
   }
　catch (Exception)
　{
　　MessageBox.Show("請拖曳影片檔!");
　}
}
======<end>==============





========<反灰>=============
this.webBrowser1.Navigate(new Uri("http://www.yahoo.com.tw"));
　　
======<end>==============



========<反灰>=============
this.webBrowser1.Navigate(new Uri("http://www.yahoo.com.tw"));
this.Shape1.Fill = new WebBrowserBrush { SourceName = "webBrowser1" };
　　
======<end>==============




========<反灰>=============

//粗體
private void button_B_Click(object sender, RoutedEventArgs e)
{
  RichTextBox1.Selection.ApplyPropertyValue(
    Run.FontWeightProperty, FontWeights.ExtraBold);
  RichTextBox1.Focus();
}
//底線
private void button_U_Click(object sender, RoutedEventArgs e)
{
  RichTextBox1.Selection.ApplyPropertyValue(
   Run.TextDecorationsProperty, TextDecorations.Underline);
  RichTextBox1.Focus();
}
//傾體
private void button_I_Click(object sender, RoutedEventArgs e)
{
  RichTextBox1.Selection.ApplyPropertyValue(
    Run.FontStyleProperty, FontStyles.Italic);
  RichTextBox1.Focus();
}
//設定文字大小
private void ComboBox_FontSize_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
  RichTextBox1.Selection.ApplyPropertyValue(
    Run.FontSizeProperty, ((ComboBoxItem)ComboBox_FontSize.SelectedItem).Content.ToString());
  RichTextBox1.Focus();
}
//設定顏色
private void ComboBox_Color_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
  RichTextBox1.Selection.ApplyPropertyValue(
    Run.ForegroundProperty, ((Rectangle)ComboBox_Color.SelectedItem).Fill);
  RichTextBox1.Focus();
}
======<end>==============





========<反灰>=============

//按下加入物件鈕
private void button_InsertUIElement_Click(object sender, RoutedEventArgs e)
{
  //建立InlineUIContainer與圖形
  InlineUIContainer container = new InlineUIContainer();
  container.Child = new Ellipse {
    Fill = new SolidColorBrush(Colors.Blue), Width = 100, Height = 30 };
  //加入物件
  RichTextBox1.Selection.Insert(container);
  RichTextBox1.Focus();
}
//按下加入圖形鈕
private void button_InsertImage_Click(object sender, RoutedEventArgs e)
{
  //建立InlineUIContainer與Image
  InlineUIContainer container = new InlineUIContainer();
  container.Child = new Image() { 
    Width=100, Height=100,  Source = 
      new System.Windows.Media.Imaging.BitmapImage(
      new Uri("http://www.StudyHost.Com/StudyHostLogo.png"))
  };
  //加入物件
  RichTextBox1.Selection.Insert(container);
  RichTextBox1.Focus();
}
======<end>==============





========<反灰>=============
//取得XAML
this.TextBox1.Text = RichTextBox1.Xaml;
//設定XAML
RichTextBox1.Xaml = this.TextBox1.Text;
======<end>==============




========<反灰>=============
//建立NotificationWindow物件
NotificationWindow nw ;
private void button1_Click(object sender, RoutedEventArgs e)
{
　//顯示突顯式視窗
　ShowNotificationWindow("突顯式視窗!");
}
void ShowNotificationWindow(string msg)
{
　if (Application.Current.IsRunningOutOfBrowser == true)
　{
　　//建立NotificationWindow的內容
　　var tb = new MyMessageWindow();
　　tb.textBlock1.Text = msg;
　　//建立NotificationWindow
　　nw = new NotificationWindow();
　　nw.Width = 300.0;
　　nw.Height = 100.0;
　　//設定NotificationWindow的內容
　　nw.Content = tb;
　　//顯示的毫秒數(自動消失時間)
　　nw.Show(3000);
　}
　else
 { MessageBox.Show("只有OOB模式下可使用"); }
}
======<end>==============