//转换
                Workbook excel = new Workbook(FileFullName);
                excel.Save(SaveFileName, Aspose.Cells.SaveFormat.Pdf);

            //去水印
            string[] stModule = new string[8]
            {
                "u0002u2006u2006u2003",
                "u0003u2006u2006u2003",
                "u0005u2005u2000u2003",
                "u0003u2000",
                "u000F",
                "u0002u2000",
                "u0003",
                "u0002"
            };
            Assembly assembly = Assembly.GetAssembly(typeof(Aspose.Slides.License));
            Type typeLic = null, typeIsTrial = null, typeHelper = null;
            foreach (Type type in assembly.GetTypes())
            {
                if ((typeLic == null) && (type.Name == stModule[0]))
                {
                    typeLic = type;
                }
                else if ((typeIsTrial == null) && (type.Name == stModule[1]))
                {
                    typeIsTrial = type;
                }
                else if ((typeHelper == null) && (type.Name == stModule[2]))
                {
                    typeHelper = type;
                }
            }
            if (typeLic == null || typeIsTrial == null || typeHelper == null)
            {
                throw new Exception();
            }
            object lic = Activator.CreateInstance(typeLic);
            int findCount = 0;

            foreach (FieldInfo field in typeLic.GetFields(BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance))
            {
                if (field.FieldType == typeLic && field.Name == stModule[3])
                {
                    field.SetValue(null, lic);
                    ++findCount;
                }
                else if (field.FieldType == typeof(DateTime) && field.Name == stModule[4])
                {
                    field.SetValue(lic, DateTime.MaxValue);
                    ++findCount;
                }
                else if (field.FieldType == typeIsTrial && field.Name == stModule[5])
                {
                    field.SetValue(lic, 1);
                    ++findCount;
                }

            }
            foreach (FieldInfo field in typeHelper.GetFields(BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance))
            {
                if (field.FieldType == typeof(bool) && field.Name == stModule[6])
                {
                    field.SetValue(null, false);
                    ++findCount;
                }
                if (field.FieldType == typeof(int) && field.Name == stModule[7])
                {
                    field.SetValue(null, 128);
                    ++findCount;
                }
            }
            if (findCount < 5)
            {
                throw new NotSupportedException("无效的版本");
            }
            //转换
            Presentation ppt = new Presentation(FileFullName);
            ppt.Save(SaveFileName, Aspose.Slides.Export.SaveFormat.Pdf);

                    //去水印
                    private const string Key = "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";
                    private static Stream LStream = (Stream)new MemoryStream(Convert.FromBase64String(Key));
                    var l = new Aspose.Pdf.License();
                    l.SetLicense(LStream);
                    //转换
                    Document doc = new Document();
                    Page page = doc.Pages.Add();
                    Aspose.Pdf.Image image = new Aspose.Pdf.Image();
                    image.File = FileFullName;
                    page.Paragraphs.Add(image);
                    PrintFileName = OfficeUtil.CombinePDFPath(ConvertPDFName);
                    doc.Save(PrintFileName);