Html转换为PDF

通过nuget 添加  text7.pdfhtml

 /// <summary>
        /// pdf下载
        /// </summary> 
        /// <returns></returns>
        [ValidateInput(false)]
        [HttpPost]
        public ActionResult DownloadPDF(string htmlContent)
        { 
            if (string.IsNullOrEmpty(htmlContent))
            {
                return null;
            } 
            var properties = new ConverterProperties();
            properties.SetCharset("utf-8");
            var provider = new DefaultFontProvider(true, true, true);// 第三个参数为True，以支持系统字体，否则不支持中文
            properties.SetFontProvider(provider);
            var mediaDeviceDescription = new MediaDeviceDescription(MediaType.PRINT);// 指当前设备类型，如果是预览使用SCREEN 
            properties.SetMediaDeviceDescription(mediaDeviceDescription);

            string pdfPath = Server.MapPath("~/" + DateTime.UtcNow.Ticks.ToString() + ".pdf");
            using (var fileInfo = new FileStream(pdfPath, FileMode.Create))
            {
                HtmlConverter.ConvertToPdf(htmlContent, fileInfo, properties);
            }
            string fileName = PublicVars.SchoolName + "准考证.pdf";
            //方式1：
            //return File(pdfPath, "application/octet-stream", HttpUtility.UrlEncode(fileName));

            //方式2：
            var fileContent = new FileContentResult(System.IO.File.ReadAllBytes(pdfPath), "application/octet-stream");
            fileContent.FileDownloadName = Server.UrlEncode(fileName);
            //下载完成删除文件
            System.IO.File.Delete(pdfPath);
            return fileContent;
        }