获取DatagridView列的图片

Question

Cells["picture"]就是存储图片的那一列。获取方法如下：
object pic_value = this.dgView.SelectedRows[0].Cells["picture"].Value;
Form f = new Form();
f.BackgroundImage = GetImageByBytes((byte[])pic_value);
f.Show();
public static Image GetImageByBytes(byte[] bytes)
        {
            try
            {
                if (bytes.Length == 0) return null; 
                Image photo = null;
                using (MemoryStream ms = new MemoryStream(bytes))
                {
                    ms.Write(bytes, 0, bytes.Length);
                    photo = Image.FromStream(ms, true);
                }                return photo;
            }
            catch
            {
                return null;
            }
        }