for(....)
{
                ..............
                if (!string.IsNullOrEmpty(pictureStr))
                {
                    Image image = Image.FromFile(pictureStr);
                    MemoryStream memoryStream = new MemoryStream();
                    image.Save(memoryStream, ImageFormat.Jpeg);                    viewDetail.SetRowCellValue(i, colPicture, memoryStream.ToArray());
                    //memoryStream.Close();
                    //memoryStream.Dispose();
                    //image.Dispose();
                }
                else
                {
                    viewDetail.SetRowCellValue(i, colPicture, null);
                }
}循环里用释放不?