System.Drawing.Bitmap 转换为 System.Windows.Media.Imaging.BitmapSource

        #region 图片转换为BitmapSource ToBitmapSource
        [DllImport("gdi32")]
        static extern int DeleteObject(IntPtr o);
        /// <summary>
        /// 图片转换为BitmapSource
        /// </summary>
        /// <param name="bitmap">图片对象System.Drawing.Bitmap</param>
        /// <returns>BitmapSource</returns>
        public static BitmapSource ToBitmapSource(System.Drawing.Bitmap bitmap)
        {
            IntPtr ip = bitmap.GetHbitmap();
            BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                ip, IntPtr.Zero, Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
            DeleteObject(ip);//释放对象
            return bitmapSource;
        }
        #endregion