上传图片包括缩略图

 private string GetImgPath()
        {
            string savePath = "images";

            System.IO.MemoryStream memStream = new System.IO.MemoryStream();
            System.Drawing.Image imgPhoto = null;
            try
            {
                memStream.Write(imgUpload.FileBytes, 0, imgUpload.FileBytes.Length);//存入内存流中
                imgPhoto = System.Drawing.Image.FromStream(memStream);//创建图形流
            }
            catch
            {
                imgPhoto = null;
            }
            if (imgPhoto == null)
            {
                return "";
            }
            imgUpload.Dispose();
            string fileName = Guid.NewGuid().ToString() + ".jpg";
            string smallName = fileName.Substring(0, fileName.LastIndexOf(".")) + "_small.jpg";
            int iWidth = 100;
            if (imgPhoto.Width > iWidth)
            {
                System.Drawing.Image.GetThumbnailImageAbort abort = new System.Drawing.Image.GetThumbnailImageAbort(GetBool);
                int iHeight = (int)((float)iWidth / imgPhoto.Width * imgPhoto.Height);
                System.Drawing.Image smallImg = imgPhoto.GetThumbnailImage(iWidth, iHeight, abort, new IntPtr());
                smallImg.Save(Server.MapPath("~/") + savePath + "\\" + smallName);
                smallImg.Dispose();
            }
            imgPhoto.Save(Server.MapPath("~/") + savePath + "\\" + fileName);
            imgPhoto.Dispose();
            return fileName;
        }