C#实现图片切割、切图、裁剪

 public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); // 设置原图 img.Source = new BitmapImage(new Uri(@"Images/1.jpg-600", UriKind.Relative)); // 切割图片 ImageSource imageSource = img.Source; Bitmap bitmap = SystemUtils.ImageSourceToBitmap(imageSource); BitmapSource bitmapSource = SystemUtils.BitmapToBitmapImage(bitmap); BitmapSource newBitmapSource = SystemUtils.CutImage(bitmapSource, new Int32Rect(125, 60, 235, 285)); // 使用切割后的图源 img.Source = newBitmapSource; } } // 图像工具类 public static class SystemUtils { /// 
 /// 切图 /// 
 /// 图源 /// 切割区域 ///  public static BitmapSource CutImage(BitmapSource bitmapSource, Int32Rect cut) { //计算Stride var stride = bitmapSource.Format.BitsPerPixel * cut.Width / 8; //声明字节数组 byte[] data = new byte[cut.Height * stride]; //调用CopyPixels bitmapSource.CopyPixels(cut, data, stride, 0); return BitmapSource.Create(cut.Width, cut.Height, 0, 0, PixelFormats.Bgr32, null, data, stride); } // ImageSource --> Bitmap public static System.Drawing.Bitmap ImageSourceToBitmap(ImageSource imageSource) { BitmapSource m = (BitmapSource)imageSource; System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(m.PixelWidth, m.PixelHeight, System.Drawing.Imaging.PixelFormat.Format32bppPArgb); System.Drawing.Imaging.BitmapData data = bmp.LockBits( new System.Drawing.Rectangle(System.Drawing.Point.Empty, bmp.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppPArgb); m.CopyPixels(Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride); bmp.UnlockBits(data); return bmp; } // Bitmap --> BitmapImage public static BitmapImage BitmapToBitmapImage(Bitmap bitmap) { using (MemoryStream stream = new MemoryStream()) { bitmap.Save(stream, ImageFormat.Bmp); stream.Position = 0; BitmapImage result = new BitmapImage(); result.BeginInit(); // According to MSDN, "The default OnDemand cache option retains access to the stream until the image is needed." // Force the bitmap to load right now so we can dispose the stream. result.CacheOption = BitmapCacheOption.OnLoad; result.StreamSource = stream; result.EndInit(); result.Freeze(); return result; } } }