c# - 如何将 bootstrap.css 添加到 pdf 文档 itextsharp

Question

以此为基础 http://dangtrung87.blogspot.com/2013/07/asp-generate-pdf-with-itextsharp.html 我有下一个代码

  string htmlText = RenderViewToString(this.ControllerContext, "report", null, true);
       htmlText = System.Text.RegularExpressions.Regex.Replace(htmlText, @"\s+", " ");
       htmlText = htmlText.Replace("\n", "").Replace("\r","").Trim();

        //Generate PDF
        using (var document = new Document(PageSize.A4, 40, 40, 40, 40))
        {

            htmlText = FormatImageLinks(htmlText);

            //define output control HTML
            var memStream = new MemoryStream();
            TextReader xmlString = new StringReader(htmlText);

            PdfWriter writer = PdfWriter.GetInstance(document, memStream);

            //open doc
            document.Open();
            string arialuniTff = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "ARIALUNI.TTF");

          // Set factories
            var htmlContext = new HtmlPipelineContext(null);
            htmlContext.SetTagFactory(Tags.GetHtmlTagProcessorFactory());

            // Set css
            ICSSResolver cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(false);

            IPipeline pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext, new PdfWriterPipeline(document, writer)));
            cssResolver.AddCssFile(HttpContext.Server.MapPath("~/Content/bootstrap.css"), true);

            cssResolver.AddCss(".shadow {background-color: #ebdddd; }", true);

            var worker = new XMLWorker(pipeline, true);
            var xmlParse = new XMLParser(true, worker);



            xmlParse.Parse(xmlString);
            xmlParse.Flush();

            document.Close();
            document.Dispose();



            return File(memStream.ToArray(), "application/pdf", "test.pdf");

        }

我这里有错误 xmlParse.Parse(xmlString); 附加信息:输入字符串无效。

如果我改变 cssResolver.AddCssFile(HttpContext.Server.MapPath("~/Content/bootstrap.css"), false);我没有错误。

我有 pdf 文件，但只能使用 cssResolver.AddCss(".shadow {background-color: #ebdddd; }", true);

bootstrap 风格不起作用 (

如何正确添加这个？？

Answer 1

出现此错误的原因是 cssResolver 必须在管道中使用之前进行初始化，请尝试更改这些行

        // Set css
        ICSSResolver cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(false);
        IPipeline pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext, new PdfWriterPipeline(document, writer)));
        cssResolver.AddCssFile(HttpContext.Server.MapPath("~/Content/bootstrap.css"), true);
        cssResolver.AddCss(".shadow {background-color: #ebdddd; }", true);

通过

        // Set css
        ICSSResolver cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(false);
cssResolver.AddCssFile(HttpContext.Server.MapPath("~/Content/bootstrap.css"), true);
        cssResolver.AddCss(".shadow {background-color: #ebdddd; }", true);
        IPipeline pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext, new PdfWriterPipeline(document, writer)));

尝试一下，对我来说效果很好。 问候