取pdf第一页作为图片保存O2S.Components.PDFRender4NET

这是调用代码 附件中有关键代码和DLL Stream stream = PdfConvertToImage.ConvertPDF2Image(NewTrainSchoolLogo.FileName, System.Web.HttpContext.Current.Server.MapPath("~/XueDaFileTemp/"), filename, 1, 1, ImageFormat.Png, 1);