c# - desktop notification using javascript in windows form -
i new , creating simple application in click button , notification on desktop should displayed. doing in windows form c#
the error " nullreferenceexception unhandled
i have 1 button notify in form1. have tried this:
form1.cs
public form1() { initializecomponent(); this.load += new eventhandler(form1_load); webbrowser1.documentcompleted += new webbrowserdocumentcompletedeventhandler(webbrowser1_documentcompleted); webbrowser1.scripterrorssuppressed = true; } private void btnnotify_click(object sender, eventargs e) { webbrowser1.document.invokescript("notifyme"); } private void form1_load(object sender, eventargs e) { string currentdirectory = directory.getcurrentdirectory(); webbrowser1.navigate(path.combine(currentdirectory,"htmlpage1.html")); } private void webbrowser1_documentcompleted(object sender, webbrowserdocumentcompletedeventargs e) { webbrowser1.objectforscripting = this; code htmlpage1.html :
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> <script language="javascript" type="text/javascript"> document.addeventlistener('domcontentloaded', function () { if (notification.permission !== "granted") notification.requestpermission(); }); function notifyme() { if (!notification) { alert('desktop notifications not available in browser. try chromium.'); return; } if (notification.permission !== "granted") notification.requestpermission(); else { var notification = new notification('notification title', { icon: 'http://cdn.sstatic.net/stackexchange/img/logos/so/so-icon.png', body: "hey there! you've been notified!", }); notification.onclick = function () { window.open("http://stackoverflow.com/a/13328397/1269037"); }; } } </script> </head> <body> </body> </html> even if put alert("hi") in notifyme() function, nothing else. still displays same error.
you have put html , scripts in debug directory if not automatically placed. thats getcurrentdirectory() hits.
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