using(var stream = new MemoryStream()) { yourBitmap.Compress(Bitmap.CompressFormat.Png,0, stream); var bytes = stream.ToArray(); var str = Convert.ToBase64String(bytes); }
Bitmap bitmap = BitmapFactory.DecodeResource(Resources, Resource.Drawable.ace1); MemoryStream stream = new MemoryStream(); bitmap.Compress(Bitmap.CompressFormat.Jpeg, 100, stream); byte[] ba = stream.ToArray(); string bal = Base64.EncodeToString(ba, Base64.Default);