/// <summary>

/// 将目标路径转为image

/// </summary>

/// <param name="path">图片路径</param>

/// <returns></returns>

public Image LoadImage(string path)

{

    //创建一个bitmap类型的bmp变量来读取文件。

    Bitmap bmp = new Bitmap(path);

    //新建第二个bitmap类型的bmp2变量，我这里是根据我的程序需要设置的。

    Bitmap bmp2 = new Bitmap(bmp.Width, bmp.Height, PixelFormat.Format16bppRgb555);

    //将第一个bmp拷贝到bmp2中

    Graphics draw = Graphics.FromImage(bmp2);

    draw.DrawImage(bmp, , );

    draw.Dispose();

    bmp.Dispose();//释放bmp文件资源

    return (Image)bmp2;

}

/// <summary>

/// 将图片转为二进制

/// </summary>

/// <param name="img">图片</param>

/// <returns></returns>

public byte[] GetByteImage(Image img)

{

    byte[] bt = null;

    if (!img.Equals(null))

    {

        using (MemoryStream mostream = new MemoryStream())

        {

            Bitmap bmp = new Bitmap(img);

            bmp.Save(mostream, System.Drawing.Imaging.ImageFormat.Jpeg);//将图像以指定的格式存入缓存内存流

            bt = new byte[mostream.Length];

            mostream.Position = ;//设置留的初始位置

            mostream.Read(bt, , Convert.ToInt32(bt.Length));

        }

    }

    return bt;

}