Question

我正在尝试使用iTextSharp创建pdf并将其转换为字节并使用保存对话框下载pdf文件。我已经使用MemoryStream将pdf转换为byte并使用HttpResponse Page方法下载pdf文件，但它似乎没有工作。它没有任何错误，单击按钮后没有任何反应。（使用Chrome，FireFox）请帮助我，检查我做错了哪个部分。谢谢！

protected void btnPDF_Click(object sender, EventArgs e)
{
byte[] pdfBytes;
using (var ms = new MemoryStream())c
{
    var doc1 = new Document();
    PdfWriter writer = PdfWriter.GetInstance(doc1, ms);
    doc1.Open();

    PdfPTable table = new PdfPTable(1);

    table.TotalWidth = 585f;
    table.LockedWidth = true;

    iTextSharp.text.pdf.PdfPCell imgCell1 = new iTextSharp.text.pdf.PdfPCell();

    var logo = iTextSharp.text.Image.GetInstance(Server.MapPath("~/image/logo.jpg"));
    doc1.Add(logo);

    var titleFont = FontFactory.GetFont("Arial", 15, Font.BOLD);
    doc1.Add(new Paragraph("Official Report. Member Report ID : " + DDLCase.SelectedValue, titleFont));

    var normalFont = FontFactory.GetFont(FontFactory.HELVETICA, 14, Font.BOLD);
    var phrase = new Phrase();

    SqlConnection con = new SqlConnection("Data Source = localhost; Initial Catalog = project; Integrated Security = SSPI");

    SqlCommand cm = new SqlCommand("Select lro.fullname, lro.contact, mr.typeofcrime, mr.location,mr.crdatetime, mr.citizenreport, pr.policeid,  pr.prdatetime, pr.policereport, aor.officialreport,  mr.image1, mr.image2, mr.image3, mr.image4, mr.image5,  pr.image1, pr.image2, pr.image3, pr.image4, pr.image5 from MemberReport mr, PoliceReport pr, LoginRegisterOthers lro, AdminOfficialReport aor where mr.memberreportid = '" + DDLCase.SelectedValue + "' and mr.memberreportid=pr.memberreportid and pr.policereportid=aor.policereportid", con);
    con.Open();
    SqlDataReader dr;

    dr = cm.ExecuteReader();

    if (dr.Read())
    {

        phrase.Add(new Chunk("Full Name :", normalFont));
        phrase.Add(dr[0].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Contact :", normalFont));
        phrase.Add(dr[1].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Type Of Crime :", normalFont));
        phrase.Add(dr[2].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Location :", normalFont));
        phrase.Add(dr[3].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Citizen Report Date Time :", normalFont));
        phrase.Add(dr[4].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Citizen Report :", normalFont));
        phrase.Add(dr[5].ToString());

        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);
        phrase.Add(Chunk.NEWLINE);

        phrase.Add(new Chunk("Citizen Images :", normalFont));

        phrase.Add(new Chunk("1.", normalFont));
        Byte[] bytes1 = (Byte[])dr[10];
        iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(bytes1);
        image1.ScaleToFit(1150f, 1150f);
        Chunk imageChunk1 = new Chunk(image1, 0, 0);
        phrase.Add(imageChunk1);

        phrase.Add(new Chunk("2.", normalFont));
        Byte[] bytes5 = (Byte[])dr[11];
        iTextSharp.text.Image image5 = iTextSharp.text.Image.GetInstance(bytes5);
        image5.ScaleToFit(1150f, 1150f);
        Chunk imageChunk5 = new Chunk(image5, 0, 0);
        phrase.Add(imageChunk5);

        phrase.Add(new Chunk("3.", normalFont));
        Byte[] bytes6 = (Byte[])dr[12];
        iTextSharp.text.Image image6 = iTextSharp.text.Image.GetInstance(bytes6);
        image6.ScaleToFit(1150f, 1150f);
        Chunk imageChunk6 = new Chunk(image6, 0, 0);
        phrase.Add(imageChunk6);

        phrase.Add(new Chunk("4.", normalFont));
        Byte[] bytes7 = (Byte[])dr[13];
        iTextSharp.text.Image image7 = iTextSharp.text.Image.GetInstance(bytes7);
        image7.ScaleToFit(1150f, 1150f);
        Chunk imageChunk7 = new Chunk(image7, 0, 0);
        phrase.Add(imageChunk7);

        phrase.Add(new Chunk("5.", normalFont));
        Byte[] bytes8 = (Byte[])dr[14];
        iTextSharp.text.Image image8 = iTextSharp.text.Image.GetInstance(bytes8);
        image8.ScaleToFit(1150f, 1150f);
        Chunk imageChunk8 = new Chunk(image8, 0, 0);
        phrase.Add(imageChunk8);

        table.AddCell(phrase);
    }
    dr.Close();
    doc1.Add(table);
    doc1.NewPage();
    doc1.Add(table2);
    doc1.Close();

    pdfBytes = ms.ToArray();
}

Response.Clear();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", String.Format("attachment; filename={0}", "Report.pdf"));
Response.OutputStream.Write(pdfBytes, 0, pdfBytes.Length);  
}

我使用IE测试它得到这个错误：

JScript匿名函数[MicrosoftAjax.js]第6行脚本

很抱歉，代码中没有错误，因为此代码不能与AJAX控件UpdatePanel一起使用。感谢观看，帮助。

Answer 1

使用此

 string fileName = string.Format(Guid.NewGuid()+".pdf");
 htmlToPdf(Server.MapPath(@"~\temp\") + fileName);
 Response.AppendHeader("Content-Disposition", "attachment; filename=" + FileName);
 Response.ContentType = "application/pdf";
 Response.TransmitFile(filePath);
 Response.End();

将iTextSharp pdf保存为字节并使用保存对话框下载

1 个答案: