关于生成缩略图:c#

    public class image
    ...{
        public Image ResourceImage;
        private int Iwidth;
        private int Iheight;
        public string errMessage;
        public image(string ImageFileName)
        ...{

            ResourceImage=Image.FromFile(ImageFileName);
            errMessage="";
        }
        public bool thumbcallback()
        ...{

            return false;
        }

        public Image GetReducedImage(int Width,int Height)
        ...{

            try
            ...{
                Image reducedImage;
                Image.GetThumbnailImageAbort calb=new System.Drawing.Image.GetTh
                 umbnailImageAbort(thumbcallback);
                reducedImage=ResourceImage.GetThumbnailImage(Width,Height,calb,IntPtr.Zero);
                return reducedImage;
            }
            catch (System.Exception ex)
            ...{
                errMessage=ex.Message;
                return null;
            }
        }