DispatcherTimer timer_CurrentBeat = new DispatcherTimer();//条码自动读取时钟 private void Window_Loaded(object sender, RoutedEventArgs e) { timer_CurrentBeat.Interval = new TimeSpan(0, 0, 1); //500毫秒执行一次 timer_CurrentBeat.Interval = new TimeSpan(500); timer_CurrentBeat.Tick += timer_CurrentBeat_Tick; timer_CurrentBeat.Start(); } delegate void SetIMGCallback(Bitmap text); /// <summary> /// 显示当前节拍及与平均节拍的差异 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void timer_CurrentBeat_Tick(object sender, EventArgs e) { string noImgPath = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + @"/Resources//151221102251.jpg"; System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(noImgPath); this.Dispatcher.BeginInvoke(new SetIMGCallback(GetBitmapSource), bitmap);//为异步调用委托 //BitmapToBitmapImage(bitmap); } [DllImport("gdi32.dll")] static extern bool DeleteObject(IntPtr hObject); public void BandImg2(Bitmap bitmap) { try { IntPtr hBitmap = bitmap.GetHbitmap(); ImageSource wpfBitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap( hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); if (!DeleteObject(hBitmap)) { throw new System.ComponentModel.Win32Exception(); } this.picImage.Source = wpfBitmap; } catch (Exception ex) { MessageBox.Show(ex.Message); } } public void BitmapToBitmapImage(Bitmap bitmap) { Bitmap bitmapSource = new Bitmap(bitmap.Width, bitmap.Height); int i, j; for (i = 0; i < bitmap.Width; i++) { for (j = 0; j < bitmap.Height; j++) { System.Drawing.Color pixelColor = bitmap.GetPixel(i, j); System.Drawing.Color newColor = System.Drawing.Color.FromArgb(pixelColor.R, pixelColor.G, pixelColor.B); bitmapSource.SetPixel(i, j, newColor); } } MemoryStream ms = new MemoryStream(); bitmapSource.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.StreamSource = new MemoryStream(ms.ToArray()); bitmapImage.EndInit(); bitmapImage.Freeze(); this.picImage.Source = bitmapImage; } /// <summary> /// 转换Bitmap到BitmapSource(经本人测试此方法为效率最高,内存最低) /// </summary> /// <param name="bmp"></param> /// <returns></returns> public void GetBitmapSource(System.Drawing.Bitmap bmp) { BitmapFrame bf = null; using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png); bf = BitmapFrame.Create(ms, BitmapCreateOptions.None, BitmapCacheOption.OnLoad); } this.picImage.Source = bf;
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