將ContentControl設置爲自定義圖像

Question

f我有一個ContentControl ...並將其內容設置爲自定義圖像...並且自定義圖像具有包含位圖數據的稱爲Source的字段...需要額外的步驟確保ContentControl顯示該位圖數據？我以爲我做了這一步錯誤，但因爲Source只是一個領域？

此外，位圖數據不斷變化。

public class VideoRenderer : System.Windows.Controls.Image 
{ 
    #region Fields 
    protected DateTime lastFrameTimestamp; 
    protected Rectangle rect; 
    protected System.Timers.Timer timer; 
    protected BitmapData bitmapData; 
    protected Bitmap bitmap = null; 
    private Video videoObject = null; 
    private Participant participantObject = null; 
    private bool isRunning = false; 
    private int updateInterval = 50; 
    private uint key = 0; 
    private int videoWidth = 0; 
    private int videoHeight = 0; 
    private SkypeRoot skypeRef; 
    private FrameTransport frameTransport; 
    private double fps = 0; 
    private System.Windows.Media.ImageSource source; 
    object bitmapLock = new object(); 
    #endregion 


    /// <summary> 
    /// Gets and sets the source of the video renderer image. 
    /// </summary> 
    public new System.Windows.Media.ImageSource Source 
    { 
     get { return source; } 
     set { source = value; } 
    } 


    #region Constructors 
    /// <summary> 
    /// Constructor. 
    /// </summary> 
    /// <param name="skype"></param> 
    public VideoRenderer(SkypeRoot skype) 
    { 
     this.skypeRef = skype; 
    } 
    #endregion 


    #region Internal Members 
    /// <summary> 
    /// Convert frame to a bitmap. 
    /// </summary> 
    /// <returns></returns> 
    internal bool MoveFrameToBitmap() 
    { 
     lock (bitmapLock) 
     { 
      if (frameTransport.bitmapDataSize == 0) 
      { 
       return false; 
      } 

      bool ResolutionHasChanged = ((videoWidth != frameTransport.width) | (videoHeight != frameTransport.height)); 

      if ((bitmap == null) | ResolutionHasChanged) 
      { 
       if (bitmap != null) 
       { 
        bitmap.Dispose(); 
       } 

       videoHeight = frameTransport.height; 
       videoWidth = frameTransport.width; 
       bitmapData = null; 
       bitmap = new Bitmap(videoWidth, videoHeight); 
       bitmapData = new BitmapData(); 
       bitmapData.Width = videoWidth; 
       bitmapData.Height = videoHeight; 
       bitmapData.PixelFormat = System.Drawing.Imaging.PixelFormat.Format24bppRgb; 
       rect = new Rectangle(0, 0, videoWidth, videoHeight); 
      } 

      bitmap.LockBits(rect, ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb, bitmapData); 
      IntPtr ptr = bitmapData.Scan0; 
      Marshal.Copy(frameTransport.bitmapData, 0, ptr, frameTransport.bitmapDataSize); 
      bitmap.UnlockBits(bitmapData); 

      if (ResolutionHasChanged) skypeRef.events.FireOnVideoResolutionChanged(this, new RootEvents.OnVideoResolutionChangedArgs(videoWidth, videoHeight)); 

      return true; 
     } 
    } 

    /// <summary> 
    /// Draw the bitmap to the picturebox. 
    /// </summary> 
    internal void DrawBitmap() 
    { 
     lock (bitmapLock) 
     { 
      using (MemoryStream memory = new MemoryStream()) 
      { 
       bitmap.Save(memory, ImageFormat.Png); 
       memory.Position = 0; 
       BitmapImage bitmapImage = new BitmapImage(); 
       bitmapImage.BeginInit(); 
       bitmapImage.StreamSource = memory; 
       bitmapImage.CacheOption = BitmapCacheOption.OnLoad; 
       bitmapImage.EndInit(); 

       source = bitmapImage; 
      } 
     } 
    } 
    #endregion 


    #region External Members 
    /// <summary> 
    /// Start the video rendering. 
    /// </summary> 
    public void Start() 
    { 
     if (isRunning) 
     { 
      return; 
     } 

     if (videoObject == null) 
     { 
      throw new Exception("Error: cannot start rendering when the associated video object is null."); 
     } 

     isRunning = true; 
     frameTransport = new FrameTransport(); 

     timer = new System.Timers.Timer(); 
     timer.Interval = updateInterval; 
     timer.Enabled = false; 
     timer.Elapsed += TimerTick; 

     Int32[] preferences = new Int32[1]; 
     preferences[0] = MakeFourCC('B', 'I', '2', '4'); 
     frameTransport.SetPreferences(1, preferences); 
     key = frameTransport.Key(); 
     videoObject.SetRemoteRendererID(key); 
     lastFrameTimestamp = DateTime.Now; 
     timer.Start(); 
    } 
    #endregion 


    #region Events 
    /// <summary> 
    /// Handle the timer when video is running. 
    /// </summary> 
    /// <param name="sender"></param> 
    /// <param name="e"></param> 
    private void TimerTick(object sender, EventArgs e) 
    { 
     if (frameTransport.IsNewFrameAvailable()) 
     { 
      bool frameOk = frameTransport.GetFrame(); 

      if (frameOk) 
      { 
       bool bitmapOk = MoveFrameToBitmap(); 

       if (bitmapOk) 
       { 
        AddCustomGraphics(); 
        DrawBitmap(); 
        double msSinceLastFrame = (Int32)DateTime.Now.Subtract(lastFrameTimestamp).TotalMilliseconds; 
        fps = 1000/msSinceLastFrame; 
        lastFrameTimestamp = DateTime.Now; 
       } 
      } 
     } 
    } 
    #endregion 
} 

乾杯。

Answer 1

這個問題是如何設置ImageSource ...創建一個非重載的Source屬性是問題...重命名這個，然後將該屬性設置爲繼承源解決了問題。

乾杯。