How to find current (X, Y) position in iTextSharp?

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鱼传尺愫
鱼传尺愫 2021-01-06 12:04

I need to create a PDF with several sections, and after each section need to add a line, but I don\'t know where to draw this line.

I need to find the exact coordin

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  • 2021-01-06 12:46

    There is indeed only the y-position.

    But if one needs to render some simple text and after that put a picture or draw a line, he can always count the size of the text rendered:

    var chunk = new Chunk(String.Format("Sample text {0}", ));                                                             
    document.Add(new Paragraph(t));
    float curY = writer.GetVerticalPosition(false);
    float x = document.Left + chunk.GetWidthPoint();
    
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  • 2021-01-06 12:59

    I believe there is only the y-position available: try

    PdfWriter.getVerticalPosition()
    
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  • 2021-01-06 13:00

    If you just need to draw a line after the current section, maybe you do not need to know current x and y. Try this:

            iTextSharp.text.pdf.draw.DottedLineSeparator sepLINE = new iTextSharp.text.pdf.draw.DottedLineSeparator();
    
            sepLINE.LineWidth = 1;
            sepLINE.Gap = 2;
            sepLINE.Percentage = 50;
            sepLINE.LineColor = new iTextSharp.text.BaseColor(System.Drawing.Color.Blue);
    
            Chunk chnkLINE = new Chunk(sepLINE);
            pdfDoc.Add(chnkLINE);
    
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  • 2021-01-06 13:03

    Like @Olaf said, use GetVerticalPosition to get the Y. The X is just the document's LeftMargin. Below is a full working WinForms app targeting iTextSharp 5.1.1.0 that hopefully does what you are looking for:

    using System;
    using System.Text;
    using System.Windows.Forms;
    using iTextSharp.text;
    using iTextSharp.text.pdf;
    using System.IO;
    
    namespace WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                //Test file name
                string TestFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Test.pdf");
    
                //Standard iTextSharp setup
                using (FileStream fs = new FileStream(TestFile, FileMode.Create, FileAccess.Write, FileShare.None))
                {
                    using (Document doc = new Document(PageSize.LETTER))
                    {
                        using (PdfWriter w = PdfWriter.GetInstance(doc, fs))
                        {
                            //Open the document for writing
                            doc.Open();
    
                            //Will hold our current x,y coordinates;
                            float curY;
                            float curX;
    
                            //Add a paragraph
                            doc.Add(new Paragraph("It was the best of times"));
    
                            //Get the current Y value
                            curY = w.GetVerticalPosition(true);
    
                            //The current X is just the left margin
                            curX = doc.LeftMargin;
    
                            //Set a color fill
                            w.DirectContent.SetRGBColorStroke(0, 0, 0);
                            //Set the x,y of where to start drawing
                            w.DirectContent.MoveTo(curX, curY);
                            //Draw a line
                            w.DirectContent.LineTo(doc.PageSize.Width - doc.RightMargin, curY);
                            //Fill the line in
                            w.DirectContent.Stroke();
    
                            //Add another paragraph
                            doc.Add(new Paragraph("It was the word of times"));
    
                            //Repeat the above. curX never really changes unless you modify the document's margins
                            curY = w.GetVerticalPosition(true);
    
                            w.DirectContent.SetRGBColorStroke(0, 0, 0);
                            w.DirectContent.MoveTo(curX, curY);
                            w.DirectContent.LineTo(doc.PageSize.Width - doc.RightMargin, curY);
                            w.DirectContent.Stroke();
    
    
                            //Close the document
                            doc.Close();
                        }
                    }
                }
    
                this.Close();
            }
        }
    }
    
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