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Link to files with relative paths using PdfLaunchAction

2017-03-07 09:37:07 Written by  support iceblue
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PDF actions can refer to external files by using either absolute or relative file paths. While using the relative path in action, the file can be moved into a different location. In Spire.PDF, we can use the PdfLaunchAction to link to files with relative paths.

Code snippet:

Step 1: Create a new PDF document and add a page to it.

PdfDocument document = new PdfDocument();
PdfPageBase page = document.Pages.Add();     

Step 2: Create a PDF launch action that refers to an external file with relative path.

PdfLaunchAction launchAction = new PdfLaunchAction(@"..\..\test.txt", PdfFilePathType.Relative);

Step 3: Create a PDF action annotation with the launch action. Add the annotation to the page.

string text = "Click here to open file with relative path";
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 13f));
RectangleF rect = new RectangleF(50, 50, 230, 15);
page.Canvas.DrawString(text, font, PdfBrushes.ForestGreen, rect);
PdfActionAnnotation annotation = new PdfActionAnnotation(rect, launchAction);
(page as PdfNewPage).Annotations.Add(annotation);     

Step 4: Save the document.

document.SaveToFile("RelativeFilePath.pdf");

Screenshot:

Link to files with relative paths using PdfLaunchAction

Full code:

using System.Drawing;
using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Annotations;
using Spire.Pdf.Graphics;

namespace Link_to_files_with_relative_paths
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a new PDF document and add a page to it
            PdfDocument document = new PdfDocument();
            PdfPageBase page = document.Pages.Add();

            //Create a PDF Launch Action       
            PdfLaunchAction launchAction = new PdfLaunchAction(@"..\..\test.txt", PdfFilePathType.Relative);
            
            //Create a PDF Action Annotation with the PDF Launch Action
            string text = "Click here to open file with relative path";
            PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 13f));
            RectangleF rect = new RectangleF(50, 50, 230, 15);
            page.Canvas.DrawString(text, font, PdfBrushes.ForestGreen, rect);
            PdfActionAnnotation annotation = new PdfActionAnnotation(rect, launchAction); 
             //Add the PDF Action Annotation to page
            (page as PdfNewPage).Annotations.Add(annotation);           

            //Save and close the document
            document.SaveToFile("RelativeFilePath.pdf");
            document.Close();
        }
    }
}

Additional Info

  • tutorial_title:
Last modified on Sunday, 26 September 2021 02:19