How to save a PDFDoc in PDFNet for Windows Store apps using javascript

[Tomas Hofmann]

Q: How do I save a file using javascript with PDFNet for Windows Store apps.

A: The functions below describe a hypothetical save button and save as button.
Note that pdfDoc is a global variable of the current document, and pdfDocStream is the current variable for the stream that is opened as the doc.

function save_click()

{

if (!pdfDoc)

{

return;

}

pdfDoc.saveAsync().then(function () {

});

return;

}

function saveAs_click()

{

if (!pdfDoc) {

return;

}

// Create the picker object and set options

var savePicker = new Windows.Storage.Pickers.FileSavePicker();

savePicker.viewMode = Windows.Storage.Pickers.PickerViewMode.list;

savePicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;

savePicker.fileTypeChoices.insert("PDF", [".pdf"]);

// Open the picker for the user to pick a file

savePicker.pickSaveFileAsync().then(function (file) {

if (file) {

file.openAsync(Windows.Storage.FileAccessMode.readWrite).then

(

function (filestream) {

var filter = new pdftron.Filters.RandomAccessStreamFilter(filestream);

pdfDoc.saveAsync(filter, pdftron.SDF.SDFDocSaveOptions.e_remove_unused).then(function () {

if (pdfDocStream) { // close the old stream

pdfDocStream.close();

}

pdfDocStream = filestream;

});

}

);

} else {

// file didn't load.

}

});

}