private float AddFileLinkAnnotation(PdfPageBase page, float y)
{
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 12f));
PdfStringFormat format = new PdfStringFormat();
format.MeasureTrailingSpaces = true;
String prompt = "Launch File: ";
SizeF size = font.MeasureString(prompt);
page.Canvas.DrawString(prompt, font, PdfBrushes.DodgerBlue, 0, y);
float x = font.MeasureString(prompt, format).Width;
String label = @"Launch Notepad.exe";
size = font.MeasureString(label);
RectangleF bounds = new RectangleF(x, y, size.Width, size.Height);
page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, x, y);
PdfFileLinkAnnotation annotation = new PdfFileLinkAnnotation(bounds, @"C:\Windows\Notepad.exe");
annotation.Color = Color.Blue;
(page as PdfNewPage).Annotations.Add(annotation);
y = bounds.Bottom;
return(y);
}
private void button1_Click(object sender, EventArgs e)
{
//Create a new object of PdfDocument.
PdfDocument doc = new PdfDocument();
//Add a page to it.
PdfPageBase page = doc.Pages.Add();
//Declare two parameters that will be passed to the constructor of PdfFileLinkAnnotation class.
RectangleF rect = new RectangleF(0, 40, 250, 35);
string filePath = @"..\..\..\..\..\..\Data\Template_Pdf_3.pdf";
//Create a file link annotation based on the two parameters and add the annotation to the new page.
PdfFileLinkAnnotation link = new PdfFileLinkAnnotation(rect, filePath);
page.AnnotationsWidget.Add(link);
//Create a free text annotation based on the same RectangleF, specifying the content.
PdfFreeTextAnnotation text = new PdfFreeTextAnnotation(rect);
text.Text = "Click here! This is a link annotation.";
PdfFont font = new PdfFont(PdfFontFamily.Helvetica, 15);
text.Font = font;
page.AnnotationsWidget.Add(text);
String result = "CreatePdfLinkAnnotation_out.pdf";
//Save the document
doc.SaveToFile(result);
//Launch the Pdf file
PDFDocumentViewer(result);
}
private static void AddFileLinkAnnotation(PdfPageBase page, float y)
{
//Define a font
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 12f));
//Set the string format
PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Left);
//Text string
String prompt = "Launch a File: ";
//Draw text string on page canvas
page.Canvas.DrawString(prompt, font, PdfBrushes.DodgerBlue, 0, y);
//Use MeasureString to get the width of string
float x = font.MeasureString(prompt, format).Width;
//String of file name
String label = "Sample.pdf";
//Use MeasureString to get the SizeF of string
SizeF size = font.MeasureString(label);
//Create a rectangle
RectangleF bounds = new RectangleF(x, y, size.Width, size.Height);
//Draw label string
page.Canvas.DrawString(label, font, PdfBrushes.OrangeRed, x, y);
//Create PdfFileLinkAnnotation on the rectangle and link file "Sample.pdf"
PdfFileLinkAnnotation annotation = new PdfFileLinkAnnotation(bounds, @"..\..\..\..\..\..\Data\Sample.pdf");
//Set color for annotation
annotation.Color = Color.Blue;
//Add annotation to the page
(page as PdfNewPage).Annotations.Add(annotation);
}
