EVO HTML to PDF Converter allows you to add links to external files in a PDF document. You can create links to external files in a PDF document by adding EvoPdfFileLinkElement objects to a PDF document.
Code Sample - Add File Links in a PDF Document
private void createPdfButton_Click(object sender, EventArgs e) { // Create a PDF document Document pdfDocument = new Document(); // Set license key received after purchase to use the converter in licensed mode // Leave it not set to use the converter in demo mode pdfDocument.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c="; // Add a page to PDF document PdfPage pdfPage = pdfDocument.AddPage(); Cursor = Cursors.WaitCursor; string outPdfFile = @"DemoAppFiles\Output\PDF_Creator\File_Links.pdf"; try { // The titles font used to mark various sections of the PDF document PdfFont titleFont = pdfDocument.AddFont(new Font("Times New Roman", 10, FontStyle.Bold, GraphicsUnit.Point)); PdfFont subtitleFont = pdfDocument.AddFont(new Font("Times New Roman", 8, FontStyle.Regular, GraphicsUnit.Point)); // The links text font PdfFont linkTextFont = pdfDocument.AddFont(new Font("Times New Roman", 8, FontStyle.Bold, GraphicsUnit.Point)); linkTextFont.IsUnderline = true; float xLocation = 5; float yLocation = 5; // Add document title TextElement titleTextElement = new TextElement(xLocation, yLocation, "Create File Links in PDF Document", titleFont); AddElementResult addElementResult = pdfPage.AddElement(titleTextElement); yLocation = addElementResult.EndPageBounds.Bottom + 15; // Make a text in PDF a link to an external file // Add the text element string text = "Click this text to open an external file!"; float textWidth = linkTextFont.GetTextWidth(text); TextElement linkTextElement = new TextElement(xLocation, yLocation, text, linkTextFont); linkTextElement.ForeColor = Color.Navy; addElementResult = pdfPage.AddElement(linkTextElement); // Create the file link element having the size of the text element RectangleF linkRectangle = new RectangleF(xLocation, yLocation, textWidth, addElementResult.EndPageBounds.Height); string filePath = @"..\..\Input\Linked_Files\Linked_External_File.txt"; FileLinkElement fileLink = new FileLinkElement(linkRectangle, filePath); // Add the file link to PDF document pdfPage.AddElement(fileLink); yLocation = addElementResult.EndPageBounds.Bottom + 10; // Make an image in PDF a link to an external file TextElement subtitleTextElement = new TextElement(xLocation, yLocation, "Click the image below to open an external file:", subtitleFont); addElementResult = pdfPage.AddElement(subtitleTextElement); yLocation = addElementResult.EndPageBounds.Bottom + 5; // Add the image element ImageElement linkImageElement = new ImageElement(xLocation, yLocation, 120, @"DemoAppFiles\Input\Images\logo.jpg"); addElementResult = pdfPage.AddElement(linkImageElement); // Create the file link element having the size of the image element linkRectangle = addElementResult.EndPageBounds; fileLink = new FileLinkElement(linkRectangle, filePath); // Add the file link to PDF document pdfPage.AddElement(fileLink); // Save the PDF document in a memory buffer byte[] outPdfBuffer = pdfDocument.Save(); // Write the memory buffer in a PDF file System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer); } catch (Exception ex) { // The PDF creation failed MessageBox.Show(String.Format("Create PDF Document Error. {0}", ex.Message)); return; } finally { // Close the PDF document pdfDocument.Close(); Cursor = Cursors.Arrow; } // Open the created PDF document in default PDF viewer try { System.Diagnostics.Process.Start(outPdfFile); } catch (Exception ex) { MessageBox.Show(String.Format("Cannot open created PDF file '{0}'. {1}", outPdfFile, ex.Message)); } }