Get PDF PageNumber using JS

[azago]

 

Is it possible to press UniButton to know the current page of the pdf displayed in a UniPDFFrame using JS ?

 

in the viewer.js i see 

    key: 'page',
    get: function get() {
      return this.pdfViewer.currentPageNumber;
    },
    set: function set(value) {
      this.pdfViewer.currentPageNumber = value;
    }
or in internet i found

iFrame.contentDocument.getElementById('pageNumber').value

 

but I can't use it in a call js

Thanks

Angelo

 

 

 

[Sherzod]

2 hours ago, azago said:

Is it possible to press UniButton to know the current page of the pdf displayed in a UniPDFFrame using JS ?

Maybe you wanted something like this:

procedure TMainForm.UniButton1Click(Sender: TObject);
begin
  UniPDFFrame1.JSInterface.JSCode('if ('#1'.iframe&&'#1'.iframe.contentDocument.getElementById("pageNumber")){alert('#1'.iframe.contentDocument.getElementById("pageNumber").value)};');
end;

 

[azago]

Thanks Sherzod,

the code works well !!

Now I have tried to execute a command to go to a page of the pdf through code js using this command

 

 (take from https://stackoverflow.com/questions/31615248/pdf-js-changing-current-page-number-programmatically)

 MainForm.pdfFrame.JSInterface.JSCode('if ('#1'.iframe&&'#1'.iframe.contentDocument.getElementById("docIframe")){'#1'.iframe.contentDocument.getElementById("docIframe").contentWindow.PDFViewerApplication.page=' + Uniedit1.Text +' };');

but not work (I'm a little poor in java).

 

any ideas on how to do it?

 

Thanks as always

Angelo