二进制与图片相互转换

        #region 图片转二进制
        /// <summary>
        /// 图片转二进制
        /// </summary>
        /// <param name="imagepath">图片文件的路径</param>
        /// <returns>二进制</returns>
        public static byte[] GetPictureData(string imagepath)
        {
            /**/
            ////根据图片文件的路径使用文件流打开，并保存为byte[] 
            FileStream fs = new FileStream(imagepath, FileMode.Open);//可以是其他重载方法 
            byte[] byData = new byte[fs.Length];
            fs.Read(byData, 0, byData.Length);
            fs.Close();
            return byData;
        }
        #endregion

        #region 二进制转图片
        /// <summary>
        /// 二进制转图片
        /// </summary>
        /// <param name="streamByte">二进制</param>
        /// <returns>图片</returns>
        public static System.Drawing.Image ReturnPhoto(byte[] streamByte)
        {
            System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);
            System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
            return img;
        }
        #endregion

        #region 二进制转图片并保存在/UploadFiles/Image
        /// <summary>
        /// 二进制转图片并保存在/UploadFiles/Image
        /// </summary>
        /// <param name="streamByte">二进制</param>
        /// <returns>保存地址</returns>
        public static string Binary_Photo_Save(byte[] streamByte)
        {
            string time = DateTime.Now.ToString("yyyyMMddHHmmssffff");
            System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);
            System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
            string uppath = System.Web.HttpContext.Current.Server.MapPath("~/UploadFiles/Image/") + "YMD_" + time + ".jpg";
            img.Save(uppath);
            return "/UploadFiles/Image/YMD_" + time + ".jpg";
        }
        #endregion