AsposeGetXpsPageCount

AsposeGetXpsPageCount function

Get the number of pages in the xps-document.

function AsposeGetXpsPageCount(
    fileBlob,
    fileName
)

Parameter	Type	Description
fileBlob	Blob object	Content of source file.
fileName	string	Source file name.

Return Value

JSON object

Field	Description
errorCode	code error (0 no error)
errorText	text error ("" no error)
pageCount	number of pages

Examples

  var fGetPageCount = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      const json = AsposeGetXpsPageCount(event.target.result, e.target.files[0].name);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Pages count: " + json.pageCount.toString();
      }
      else 
        document.getElementById('output').textContent = json.errorText;
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Web Worker example:

  /*Create Web Worker*/
  const AsposePageWebWorker = new Worker("AsposePageforJS.js");
  AsposePageWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePageWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'library loaded!' :
      (evt.data.json.errorCode == 0) ? `Number of pages      : ${evt.data.json.pageCount}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const fGetPagesCount = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      AsposePageWebWorker.postMessage({ "operation": 'AsposeGetXpsPageCount', "params": [event.target.result, e.target.files[0].name] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };