Question

我使用iText从ASP.NET网络表单生成带有填充数据的文本字段的pdf。出于某种原因，当生成pdf时，文本字段显示为空，但是当我将光标放在字段上时，文本显示。如果我单击其他位置，则文本字段中的文本会再次消失。这是代码，添加一个名为＆＃34; Field_0_0＆＃34;的文本字段。文字＆＃34; hello1＆＃34;设置为文本字段，但在单击文本框之前不会显示。在文本字段中获取文本的唯一方法是键入内容，然后在失去焦点后文本停留在那里。

        byte[] templatebytes = null;


        //Dim doc As New Document(iTextSharp.text.PageSize.LETTER, 10, 10, 42, 35)
        Document doc = new Document(iTextSharp.text.PageSize.LETTER);
        MemoryStream stream = new MemoryStream();
        PdfWriter writer = PdfWriter.GetInstance(doc, stream);

        doc.Open();

        Paragraph para = new Paragraph("This is my first paragraph");
        Phrase pharse = new Phrase("This is my first phrase");
        Chunk chunk_ = new Chunk("This is my first chunk");

        doc.Add(para);
        doc.Add(pharse);
        doc.Add(chunk_);

        doc.Close();

        templatebytes = stream.ToArray();


        //==============================================================================================================================================
        Stream stream2 = new MemoryStream(templatebytes);

        byte[] finalbytes = null;

        using (MemoryStream outputPdfStream = new MemoryStream())
        {
            iTextSharp.text.pdf.PdfReader pdfReader = new iTextSharp.text.pdf.PdfReader(stream2);
            iTextSharp.text.pdf.PdfStamper pdfStamper = new iTextSharp.text.pdf.PdfStamper(pdfReader, outputPdfStream);

            TextField tf1 = new TextField(writer, new iTextSharp.text.Rectangle(20, 20, 200, 100), "Field_0_0");


            tf1.DefaultText = "     ";
            tf1.Options = TextField.MULTILINE | TextField.VISIBLE;
            tf1.TextColor = BaseColor.BLACK;
            tf1.FontSize = 10;
            tf1.BorderWidth = 1;
            tf1.BorderColor = BaseColor.BLUE;

            pdfStamper.AddAnnotation(tf1.GetTextField(), 1);


            pdfStamper.Close();

            finalbytes = outputPdfStream.ToArray();
        }






        //====================================== set data ========================================
        Stream stream3 = new MemoryStream(finalbytes);

        byte[] finalbytes3 = null;


        using (MemoryStream outputPdfStream = new MemoryStream())
        {
            iTextSharp.text.pdf.PdfReader pdfReader = new iTextSharp.text.pdf.PdfReader(stream3);
            iTextSharp.text.pdf.PdfStamper pdfStamper = new iTextSharp.text.pdf.PdfStamper(pdfReader, outputPdfStream);



            //Set fields with data
            iTextSharp.text.pdf.AcroFields form = pdfStamper.AcroFields;
            IDictionary<string, iTextSharp.text.pdf.AcroFields.Item> fields = form.Fields;


            string value = "Hello1"; //$"Line1{Environment.NewLine}Line2";

            form.SetField("Field_0_0", value); //$"Line1{Environment.NewLine}Line2"

            pdfStamper.Close();

            finalbytes3 = outputPdfStream.ToArray();
        }

        Response.Clear();
        Response.AddHeader("Content-Disposition", "attachment; filename=GeneratedPDF.pdf");
        Response.AddHeader("Content-Length", finalbytes3.Length.ToString());
        Response.BinaryWrite(finalbytes3);
        Response.End();

希望我解释了这一点。我无法在线找到解决此问题的解决方案。

由于

使用iText生成pdf。文本字段显示字段焦点后的数据

0 个答案: