Bitmap转ImageSource

bitmap to bytes

Bitmap   b   =   new   Bitmap( "test.bmp ");

MemoryStream   ms   =   new   MemoryStream();

b.Save(ms,System.Drawing.Imaging.ImageFormat.Bmp);

byte[]   bytes=   ms.GetBuffer();  //byte[]   bytes=   ms.ToArray(); 这两句都可以，至于区别么，下面有解释

ms.Close();

bytes to bitmap

byte[]   bytelist=bytes;

MemoryStream   ms1   =   new   MemoryStream(bytelist);

Bitmap   bm   =   (Bitmap)Image.FromStream(ms1);

ms1.Close();

public static ImageSource ChangeBitmapToImageSource(Bitmap bitmap)

        {

            //Bitmap bitmap = icon.ToBitmap();

            IntPtr hBitmap = bitmap.GetHbitmap();

            //最好不要用这个，非托管的，如果给控件设置了background，你用gdi32.dll的DeleteObject也没用还是会内存泄露

            ImageSource wpfBitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

                hBitmap,

                IntPtr.Zero,

                Int32Rect.Empty,

                BitmapSizeOptions.FromEmptyOptions());

            if (!DeleteObject(hBitmap))

            {

                throw new System.ComponentModel.Win32Exception();

            }

            return wpfBitmap;

        }

var img = new ImageBrush();

img.ImageSource = new BitmapImage(new Uri($"{AppDomain.CurrentDomain.BaseDirectory}\\xxx.bmp",

UriKind.Absolute));

bd.Background = img;

巴特西

Bitmap转ImageSource

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