WPF(C#)中Bitmap与BitmapImage相互转换

一、WPF的Image控件中设置ImageSource

image1.Source = new BitmapImage(new Uri(@"image file path", Urikind.RelativeOrAbsolute));

还可以使用：

System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); fs.Close(); fs.Dispose(); System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer); BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.StreamSource = ms; bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.EndInit(); ms.Dispose(); image1.Source = bitmapImage;

还可以使用：

BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.UriSource = new Uri(szPath);//szPath为图片的全路径 bitmapImage.EndInit(); bitmapImage.Freeze(); image1.Source = bitmapImage;

二、Bitmap转BitmapImage
先将Bitmap储存成memorystream，然后指定给BitmapImage

private BitmapImage BitmapToBitmapImage(System.Drawing.Bitmap bitmap) { BitmapImage bitmapImage = new BitmapImage(); using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { bitmap.Save(ms, bitmap.RawFormat); bitmapImage.BeginInit(); bitmapImage.StreamSource = ms; bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.EndInit(); bitmapImage.Freeze(); } return bitmapImage; } image1.Source = BitmapToBitmapImage(bitmap);

三、Bitmap转BitmapSource

/*------------------------------------------------------------------------- //Imaging.CreateBitmapSourceFromHBitmap方法，基于所提供的非托管位图和调色板信息的指针， //返回一个托管的BitmapSource ---------------------------------------------------------------------------*/ Bitmap bitmap = CaptureScreen.GetDesktopImage(); IntPtr ip = bitmap.GetHbitmap();//从GDI+ Bitmap创建GDI位图对象 BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(ip, IntPtr.Zero, Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions()); image1.Source = bitmapSource;

四、BitmapSource转Bitmap

BitmapSource m = (BitmapSource)image1.Source; 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);