office365 - Office.context.document.url still empty after saving the file -

i'm developing office task pane add-in microsoft project , bumped serious limitation.

after creating new project file, load task pane app, has subfunction, reads office.context.document.url property, should have full path file.

obviously, @ first, it's empty, because it's unsaved project, after save project, , fire subfunction again, url still empty.

i suppose, document object not reloaded @ point during saving. how can manually? if it's possible...

here's subfunction returns project path:

function getprojectpath() {     var documenturl = office.context.document.url;     if (documenturl == null || documenturl == "") {         return "";     }     else {         return documenturl;     } } 

this question project, not support method, have dynamic access file url word, excel , ppt, recommend use getfilepropertiesasync method.

here sample on how use it:

function getfileurl() {      //get url of current file.      office.context.document.getfilepropertiesasync(function (asyncresult) {          var fileurl = asyncresult.value.url;          if (fileurl == "") {              showmessage("the file hasn't been saved yet. save file , try again");          }          else {              showmessage(fileurl);          }      });  }