Aspose html for PPT

  //dox.pptx  只是个本地文档
 PresentationEx pres = new PresentationEx("dox.pptx");
            pres.Slides.AddFromHtml("<p style=\"font-size:18px;font-weight: bold; font-family: ‘Microsoft YaHei UI‘\" align=\"center\">月度考试</p>");
            pres.Slides.AddFromHtml(string.Format("<p style=\"font-size:18px;font-weight: bold; \" align=\"center\">{0}</p>", DateTime.Now.ToString("yyyy年M月d日  dddd")));
            pres.Slides.AddFromHtml("<p style=\"font-size:18px;font-weight: bold; font-family: ‘Microsoft YaHei UI‘\" align=\"center\"> 第10周 周考试</p>");

            SaveFileDialog save = new SaveFileDialog();
            if (save.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                pres.Save(save.FileName,Aspose.Slides.Export.SaveFormat.Pptx);
            }