// Loads an existing PDF and renders it to a Bitmap
public void renderFile(object sender, EventArgs e)
{
// Render the page and save it to an image file
try
{
// Load in an already created PDF
using (var document = PDDocument.Load(assetManager.Open("Created.pdf")))
// Create a renderer for the document
using (var renderer = new PDFRenderer(document))
{
// Render the image to an RGB Bitmap
pageImage = renderer.RenderImage(0, 1, Bitmap.Config.Rgb565);
// Save the render result to an image
string filePath = root.AbsolutePath + "/render.jpg";
using (var stream = new FileStream(filePath, FileMode.Create))
{
pageImage.Compress(Bitmap.CompressFormat.Jpeg, 100, stream);
}
tv.Text = "Successfully rendered image to " + filePath;
// Optional: display the render result on screen
displayRenderedImage();
}
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while rendering file", ex);
}
}
// Fills in a PDF form and saves the result
public void fillForm(object sender, EventArgs e)
{
try
{
// Load the document and get the AcroForm
using (var document = PDDocument.Load(assetManager.Open("FormTest.pdf")))
using (var docCatalog = document.DocumentCatalog)
using (var acroForm = docCatalog.AcroForm)
{
// Fill the text field
using (var field = (PDTextField)acroForm.GetField("TextField"))
{
field.Value = "Filled Text Field";
// Optional: don't allow this field to be edited
field.ReadOnly = true;
}
using (var checkbox = acroForm.GetField("Checkbox"))
{
((PDCheckbox)checkbox).Check();
}
using (var radio = acroForm.GetField("Radio"))
{
((PDRadioButton)radio).Value = "Second";
}
// TODO: Use List<int>
using (var listbox = acroForm.GetField("ListBox"))
{
List <Integer> listValues = new List <Integer>();
listValues.Add(Integer.ValueOf(1.ToString()));
listValues.Add(Integer.ValueOf(2.ToString()));
((PDListBox)listbox).SelectedOptionsIndex = listValues;
}
/*
* // TODO: Fix Exception
* using (var dropdown = acroForm.GetField("Dropdown"))
* {
* IList<string> list = new List<string>();
* list.Add("Hello");
* ((PDComboBox)dropdown).Value = list;
* }
*/
string path = root.AbsolutePath + "/FilledForm.pdf";
tv.Text = "Saved filled form to " + path;
document.Save(path);
document.Close();
}
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while filling form fields", ex);
}
}
// Strips the text from a PDF and displays the text on screen
public void stripText(object sender, EventArgs e)
{
string parsedText = null;
PDDocument document = null;
try
{
document = PDDocument.Load(assetManager.Open("Hello.pdf"));
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while loading document to strip", ex);
}
try
{
using (var pdfStripper = new PDFTextStripper())
{
pdfStripper.StartPage = 0;
pdfStripper.EndPage = 1;
parsedText = "Parsed text: " + pdfStripper.GetText(document);
}
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while stripping text", ex);
}
finally
{
try
{
if (document != null)
{
document.Close();
document.Dispose();
}
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while closing document", ex);
}
}
tv.Text = parsedText;
}
// Creates a new PDF from scratch and saves it to a file
public void createPdf(object sender, EventArgs e)
{
using (var document = new PDDocument())
using (var page = new PDPage())
{
document.AddPage(page);
// Create a new font object selecting one of the PDF base fonts
using (PDFont font = PDType1Font.Helvetica)
{
// Or a custom font
//try
//{
// // Replace MyFontFile with the path to the asset font you'd like to use.
// // Or use LiberationSans "com/tom_roush/pdfbox/resources/ttf/LiberationSans-Regular.ttf"
// font = PDType0Font.Load(document, assetManager.Open("MyFontFile.ttf"));
//}
//catch (IOException ex)
//{
// Log.Error("PdfBox-Android-Sample", "Could not load font", ex);
//}
try
{
// Define a content stream for adding to the PDF
using (var contentStream = new PDPageContentStream(document, page))
{
// Write Hello World in blue text
contentStream.BeginText();
contentStream.SetNonStrokingColor(15, 38, 192);
contentStream.SetFont(font, 12);
contentStream.NewLineAtOffset(100, 700);
contentStream.ShowText("Hello World");
contentStream.EndText();
// Load in the images
var inStream = assetManager.Open("falcon.jpg");
var alphaStream = assetManager.Open("trans.png");
// Draw a green rectangle
contentStream.AddRect(5, 500, 100, 100);
contentStream.SetNonStrokingColor(0, 255, 125);
contentStream.Fill();
// Draw the falcon base image
using (var ximage = JPEGFactory.CreateFromStream(document, inStream))
{
contentStream.DrawImage(ximage, 20, 20);
}
// Draw the red overlay image
using (var alphaImage = BitmapFactory.DecodeStream(alphaStream))
using (var alphaXimage = LosslessFactory.CreateFromImage(document, alphaImage))
{
contentStream.DrawImage(alphaXimage, 20, 20);
}
// Make sure that the content stream is closed:
contentStream.Close();
// Save the final pdf document to a file
string path = root.AbsolutePath + "/Created.pdf";
document.Save(path);
document.Close();
tv.Text = "Successfully wrote PDF to " + path;
}
}
catch (IOException ex)
{
Log.Error("PdfBox-Android-Sample", "Exception thrown while creating PDF", ex);
}
}
}
}
