javascript - 从 iTextSharp 生成 Base64

Question

我的项目中有如下方法。

        [Route("GerarPdf")]
        [HttpGet()]
        public object GerarPdf()
        {

            var doc = new Document(iTextSharp.text.PageSize.LETTER, 10, 10, 42, 35);
            var mem = new MemoryStream();

            PdfWriter wri = PdfWriter.GetInstance(doc, mem);

            doc.Open();//Open Document to write
            Paragraph paragraph = new Paragraph("This is my first line using Paragraph.");
            Phrase pharse = new Phrase("This is my second line using Pharse.");
            Chunk chunk = new Chunk(" This is my third line using Chunk.");

            doc.Add(paragraph);
            doc.Add(pharse);
            doc.Add(chunk);

            var pdf = mem.ToArray();

            return Convert.ToBase64String(pdf);
        }

此代码的目的是生成可通过以下 JavaScript 代码下载的 PDF 文件

     var dataURI = "data:application/pdf;base64," +result;
     window.open(dataURI,'_blank'); 

但是新打开的页面在加载 PDF 时总是返回错误。该方法返回给result变量的base64编码为:

JVBERi0xLjQKJeLjz9MK

谁能帮我解决这个问题？

Answer 1

问题是在转换为 bytearray 时文档没有关闭。在我添加 doc.Close(); 之后PDF 已成功生成。

        [Route("GerarPdf")]
        [HttpGet()]
        public object GerarPdf()
        {

            var doc = new Document(iTextSharp.text.PageSize.LETTER, 10, 10, 42, 35);
            var mem = new MemoryStream();

            PdfWriter wri = PdfWriter.GetInstance(doc, mem);

            doc.Open();//Open Document to write
            Paragraph paragraph = new Paragraph("This is my first line using Paragraph.");
            Phrase pharse = new Phrase("This is my second line using Pharse.");
            Chunk chunk = new Chunk(" This is my third line using Chunk.");

            doc.Add(paragraph);
            doc.Add(pharse);
            doc.Add(chunk);

            doc.Close();

            var pdf = mem.ToArray();

            return Convert.ToBase64String(pdf);
        }