iTextSharp 正在生成带有响应的损坏 PDF

Posted 2023-03-14

【中文标题】iTextSharp 正在生成带有响应的损坏 PDF

【英文标题】：iTextSharp is producing a corrupt PDF with Response

【发布时间】：2014-07-30 09:27:50

【问题描述】：

两个都试了，还是不行

iTextSharp + FileStream = Corrupt PDF file

iTextSharp is producing a corrupt PDF

using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream())
        
            //abre o documento para poder editar
            document.Open();

            //Adiciona os campos de assinatura
            document.Add(Assinatura());

            //fecha o documento ao finalizar a edição
            document.Close();

            //Prepara o download
            byte[] bytes = memoryStream.ToArray();
            memoryStream.Close();
            Response.Clear();
            Response.ContentType = "image/pdf";
            //Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", "attachment;
            filename=ControleDePonto.pdf");
            Response.Buffer = true;
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.BinaryWrite(bytes);
            Response.End();
            Response.Close();
        

我做错了什么？

【问题讨论】：

application/pdf 是正确的 MIME 类型。见this question。顺便结束 Response 之后就不用关闭了。

我也试过了，但没有成功

刚刚注意到，您永远不会将document 中的信息传递到您的内存流中。

没关系，我只是放置了“PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);”在错误的线路上

【参考方案1】：

使用 PdfWriter 将 PDF 写入 MemoryStream。

PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);
document.Open();

//Adiciona os campos de assinatura
document.Add(Assinatura());

//fecha o documento ao finalizar a edição
document.Close();

//Prepara o download
byte[] bytes = memoryStream.ToArray();
memoryStream.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment;filename=ControleDePonto.pdf");
Response.Buffer = true;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(bytes);
Response.End();

【讨论】：

Assinatura() 返回什么？

@rar 如果您想联系 OP，请使用 @ 语法。