代码如下:

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Drawing;

usingSystem.IO;

namespaceMicrosoft.Form.Base

{

    classImageToByte

    {

        /// <summary>

        /// 图片转换成字节流

        /// </summary>

        /// <param name="img">要转换的Image对象</param>

        /// <returns>转换后返回的字节流</returns>

        publicstaticbyte[] ImgToByt(Image img)

        {

            MemoryStream ms = newMemoryStream();

            byte[] imagedata = null;

            img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

            imagedata = ms.GetBuffer();

            returnimagedata;

        }

        /// <summary>

        /// 字节流转换成图片

        /// </summary>

        /// <param name="byt">要转换的字节流</param>

        /// <returns>转换得到的Image对象</returns>

        publicstaticImage BytToImg(byte[] byt)

        {

            MemoryStream ms = newMemoryStream(byt);

            Image img = Image.FromStream(ms);

            returnimg;

        }

        //

        /// <summary>

        /// 根据图片路径返回图片的字节流byte[]

        /// </summary>

        /// <param name="imagePath">图片路径</param>

        /// <returns>返回的字节流</returns>

        privatestaticbyte[] getImageByte(stringimagePath)

        {

            FileStream files = newFileStream(imagePath, FileMode.Open);

            byte[] imgByte = newbyte[files.Length];

            files.Read(imgByte, , imgByte.Length);

            files.Close();

            returnimgByte;

        }

    }

}