使用 itextsharp 在 PDF 中保持相似的图像大小

我正在使用 itextsharp 将我的图片转换为 pdf 文件。我用的是块。然而，当我使用块新线时，尽管我使用了相同的比例来适应，但我的图像会改变它的大小。

protected void btnPDF_Click(object sender, EventArgs e)
    {

        var doc1 = new Document();
        var filename = "MyTestPDF" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".pdf";
        var output = new FileStream(Path.Combine("C:\\Users\\apr13mpsip\\Downloads", filename), FileMode.Create);
        iTextSharp.text.pdf.PdfWriter.GetInstance(doc1, output);
        doc1.Open();


        PdfPTable table = new PdfPTable(1);

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


        PdfPTable table2 = new PdfPTable(1);
        table2.TotalWidth = 585f;
        table2.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();
        var phrase2 = 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())
        {


            phrase2.Add(new Chunk("Citizen Images :", normalFont));

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);

            phrase2.Add(new Chunk("1.", normalFont));
            Byte[] bytes1 = (Byte[])dr[10];
            iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(bytes1);
            image1.ScaleToFit(750f, 750f);
            Chunk imageChunk1 = new Chunk(image1, 0, -30);
            phrase2.Add(imageChunk1);

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);


            phrase2.Add(new Chunk("2.", normalFont));
            Byte[] bytes5 = (Byte[])dr[11];
            iTextSharp.text.Image image5 = iTextSharp.text.Image.GetInstance(bytes5);
            image5.ScaleToFit(750f, 750f);
            Chunk imageChunk5 = new Chunk(image5, 0, -30);
            phrase2.Add(imageChunk5);

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);

            phrase2.Add(new Chunk("3.", normalFont));
            Byte[] bytes6 = (Byte[])dr[12];
            iTextSharp.text.Image image6 = iTextSharp.text.Image.GetInstance(bytes6);
            image6.ScaleToFit(750f, 750f);
            Chunk imageChunk6 = new Chunk(image6, 0, -30);
            phrase2.Add(imageChunk6);

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);


            phrase2.Add(new Chunk("4.", normalFont));
            Byte[] bytes7 = (Byte[])dr[13];
            iTextSharp.text.Image image7 = iTextSharp.text.Image.GetInstance(bytes7);
            image7.ScaleToFit(750f, 750f);
            Chunk imageChunk7 = new Chunk(image7, 0, -30);
            phrase2.Add(imageChunk7);

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);

            phrase2.Add(new Chunk("5.", normalFont));
            Byte[] bytes8 = (Byte[])dr[14];
            iTextSharp.text.Image image8 = iTextSharp.text.Image.GetInstance(bytes8);
            image8.ScaleToFit(750f, 750f);
            Chunk imageChunk8 = new Chunk(image8, 0, -30);
            phrase2.Add(imageChunk8);

            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);
            phrase2.Add(Chunk.NEWLINE);


            table2.AddCell(phrase2);

        }

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


}

我完全忘记了这个问题，但我现在回答一下以供进一步参考。 iTextSharp 自动调整图像大小（这是大多数情况下您想要的），但您可以通过设置来避免这种情况ScaleToFitHeight = false到每个图像。

phrase2.Add(new Chunk("1.", normalFont));
Byte[] bytes1 = (Byte[])dr[10];
iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(bytes1);
image1.ScaleToFit(750f, 750f);
//set scale to fit height = false
image1.ScaleToFitHeight = false;
Chunk imageChunk1 = new Chunk(image1, 0, -30);
phrase2.Add(imageChunk1);