The sample demonstrates how to add link to PDF document.

Download Link.pdf

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

namespace Link
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a pdf document.
            PdfDocument doc = new PdfDocument();

            //margin
            PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
            PdfMargins margin = new PdfMargins();
            margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Bottom = margin.Top;
            margin.Left = unitCvtr.ConvertUnits(3.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Right = margin.Left;

            // Create one page
            PdfPageBase page = doc.Pages.Add(PdfPageSize.A4, margin);

            float y = 10;
            float x = 0;
            PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 12));
            String label = "Simple Link: ";
            PdfStringFormat format = new PdfStringFormat();
            format.MeasureTrailingSpaces = true;
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format);
            x = font.MeasureString(label, format).Width;
            PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("Arial", 12, FontStyle.Underline));
            String url1 = "http://www.e-iceblue.com";
            page.Canvas.DrawString(url1, font1, PdfBrushes.Blue, x, y);
            y = y + font1.MeasureString(url1).Height;

            label = "Web Link: ";
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format);
            x = font.MeasureString(label, format).Width;
            String text = "e-iceblue";
            PdfTextWebLink link2 = new PdfTextWebLink();
            link2.Text = text;
            link2.Url = url1;
            link2.Font = font1;
            link2.Brush = PdfBrushes.Blue;
            link2.DrawTextWebLink(page.Canvas, new PointF(x, y));
            y = y + font1.MeasureString(text).Height;

            label = "URI Annonationa: ";
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format);
            x = font.MeasureString(label, format).Width;
            text = "Google";
            PointF location = new PointF(x, y);
            SizeF size = font1.MeasureString(text);
            RectangleF linkBounds = new RectangleF(location, size);
            PdfUriAnnotation link3 = new PdfUriAnnotation(linkBounds);
            link3.Border = new PdfAnnotationBorder(0);
            link3.Uri = "http://www.google.com";
            (page as PdfNewPage).Annotations.Add(link3);
            page.Canvas.DrawString(text, font1, PdfBrushes.Blue, x, y);
            y = y + size.Height;

            label = "URI Annonationa Action: ";
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format);
            x = font.MeasureString(label, format).Width;
            text = "JavaScript Action (Click Me)";
            location = new PointF(x, y);
            size = font1.MeasureString(text);
            linkBounds = new RectangleF(location, size);
            PdfUriAnnotation link4 = new PdfUriAnnotation(linkBounds);
            link4.Border = new PdfAnnotationBorder(0.75f);
            link4.Color = Color.LightGray;
            //script
            String script
                = "app.alert({"
                + "    cMsg: \"Hello.\","
                + "    nIcon: 3,"
                + "    cTitle: \"JavaScript Action\""
                + "});";
            PdfJavaScriptAction action = new PdfJavaScriptAction(script);
            link4.Action = action;
            (page as PdfNewPage).Annotations.Add(link4);
            page.Canvas.DrawString(text, font1, PdfBrushes.Blue, x, y);
            y = y + size.Height;

            //Save pdf file.
            doc.SaveToFile("Link.pdf");
            doc.Close();

            //Launching the Pdf file.
            System.Diagnostics.Process.Start("Link.pdf");
        }
    }
}

Imports System.Drawing
Imports Spire.Pdf
Imports Spire.Pdf.Actions
Imports Spire.Pdf.Annotations
Imports Spire.Pdf.Graphics

Namespace Link
    Friend Class Program
        Shared Sub Main(ByVal args() As String)
            'Create a pdf document.
            Dim doc As New PdfDocument()

            'margin
            Dim unitCvtr As New PdfUnitConvertor()
            Dim margin As New PdfMargins()
            margin.Top = unitCvtr.ConvertUnits(2.54F, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point)
            margin.Bottom = margin.Top
            margin.Left = unitCvtr.ConvertUnits(3.17F, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point)
            margin.Right = margin.Left

            ' Create one page
            Dim page As PdfPageBase = doc.Pages.Add(PdfPageSize.A4, margin)

            Dim y As Single = 10
            Dim x As Single = 0
            Dim font As New PdfTrueTypeFont(New Font("Arial", 12))
            Dim label As String = "Simple Link: "
            Dim format As New PdfStringFormat()
            format.MeasureTrailingSpaces = True
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format)
            x = font.MeasureString(label, format).Width
            Dim font1 As New PdfTrueTypeFont(New Font("Arial", 12, FontStyle.Underline))
            Dim url1 As String = "http://www.e-iceblue.com"
            page.Canvas.DrawString(url1, font1, PdfBrushes.Blue, x, y)
            y = y + font1.MeasureString(url1).Height

            label = "Web Link: "
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format)
            x = font.MeasureString(label, format).Width
            Dim text As String = "e-iceblue"
            Dim link2 As New PdfTextWebLink()
            link2.Text = text
            link2.Url = url1
            link2.Font = font1
            link2.Brush = PdfBrushes.Blue
            link2.DrawTextWebLink(page.Canvas, New PointF(x, y))
            y = y + font1.MeasureString(text).Height

            label = "URI Annonationa: "
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format)
            x = font.MeasureString(label, format).Width
            text = "Google"
            Dim location As New PointF(x, y)
            Dim size As SizeF = font1.MeasureString(text)
            Dim linkBounds As New RectangleF(location, size)
            Dim link3 As New PdfUriAnnotation(linkBounds)
            link3.Border = New PdfAnnotationBorder(0)
            link3.Uri = "http://www.google.com"
            TryCast(page, PdfNewPage).Annotations.Add(link3)
            page.Canvas.DrawString(text, font1, PdfBrushes.Blue, x, y)
            y = y + size.Height

            label = "URI Annonationa Action: "
            page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, 0, y, format)
            x = font.MeasureString(label, format).Width
            text = "JavaScript Action (Click Me)"
            location = New PointF(x, y)
            size = font1.MeasureString(text)
            linkBounds = New RectangleF(location, size)
            Dim link4 As New PdfUriAnnotation(linkBounds)
            link4.Border = New PdfAnnotationBorder(0.75F)
            link4.Color = Color.LightGray
            'script
            Dim script As String _
                = "app.alert({" _
                & "    cMsg: ""Hello.""," _
                & "    nIcon: 3," _
                & "    cTitle: ""JavaScript Action""" _
                & "});"
            Dim action As New PdfJavaScriptAction(script)
            link4.Action = action
            TryCast(page, PdfNewPage).Annotations.Add(link4)
            page.Canvas.DrawString(text, font1, PdfBrushes.Blue, x, y)
            y = y + size.Height

            'Save pdf file.
            doc.SaveToFile("Link.pdf")
            doc.Close()

            'Launching the Pdf file.
            Process.Start("Link.pdf")
        End Sub
    End Class
End Namespace