wpf 圖片操作類 ImageBrush BitmapImage

 /// <summary>
        /// 解析字節數組成圖片
        /// </summary>
        /// <param name="byteArray"></param>
        /// <returns></returns>
        public static BitmapImage ByteArrayToBitmapImage(byte[] byteArray)
        {
            BitmapImage bmp = null;
            try
            {
                bmp = new BitmapImage();
                bmp.BeginInit();
                bmp.StreamSource = new MemoryStream(byteArray);
                bmp.EndInit();
            }
            catch
            {
                bmp = null;
            }
            return bmp;
        }


        /// <summary>
        /// 圖片數據解析成字節流數組(用於存儲到數據庫)
        /// </summary>
        /// <param name="bmp"></param>
        /// <returns></returns>
        public static byte[] BitmapImageToByteArray(BitmapImage bmp)
        {
            byte[] byteArray = null;
            try
            {
                Stream sMarket = bmp.StreamSource;
                if (sMarket != null && sMarket.Length > 0)
                {
                    sMarket.Position = 0;
                    using (BinaryReader br = new BinaryReader(sMarket))
                    {
                        byteArray = br.ReadBytes((int)sMarket.Length);
                    }
                }
            }
            catch
            {
            }
            return byteArray;
        }

        /// <summary>
        /// 根據圖片的路徑解析成圖片資源
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        public static byte[] BitmapImageToByteArray(String filePath)
        {

            byte[] byteArray = null ;
            if(File.Exists(filePath))
                byteArray = File.ReadAllBytes(filePath);
            return byteArray;
        }

        /// <summary>
        /// 根據圖片的相對路徑 返回 BitmapImage對象的實例化
        /// </summary>
        /// <param name="imgPath">圖片的相對路徑(如:@"/images/star.png")</param>
        /// <returns></returns>
        public static BitmapImage GetBitmapImage(string imgPath)
        {
            try
            {
                if (!imgPath.StartsWith("/"))
                {
                    imgPath = "/" + imgPath;
                }
                return new BitmapImage(new Uri("Pack://application:,,," + imgPath));
            }
            catch
            {
                return EmptyImageSource;
            }
        }

        /// <summary>
        /// 根據圖片的相對路徑 獲取Image對象
        /// </summary>
        /// <param name="imgPath">圖片的相對路徑(如:@"/images/star.png")</param>
        /// <returns></returns>
        public static Image GetImage(string imgPath)
        {
            if (File.Exists(imgPath))
            {
                Image im = new Image();
                im.Source = GetBitmapImage(imgPath);
                return im;
            }
            else
                return null;
        }

        /// <summary>
        /// 根據圖片的相對路徑 獲取ImageBrush對象 (此對象資源可以直接用於綁定控件的Background屬性)
        /// </summary>
        /// <param name="imgPath">圖片的相對路徑(如:@"/images/star.png")</param>
        /// <returns></returns>
        public static ImageBrush GetImageBrush(string imgPath)
        {
            if (File.Exists(imgPath))
            {
                ImageBrush ib = new ImageBrush();
                ib.ImageSource = GetBitmapImage(imgPath);
                return ib;
            }
            else
                return null;
        }