c# - Adding contextmenu to WP8 browser control -

i trying attach context menu when user perform hold gesture on link on webpage.

i've searched web , found recommendations here

if (webbrowser.isscriptenabled)         {             webbrowser.invokescript("execscript", "function eventlistener(evt){ if (evt.type == 'mspointerdown') { gesturehandler.addpointer(evt.pointerid); return; } if (evt.detail & evt.msgesture_flag_end) {  window.external.notify(evt.srcelement.tagname);}}");             webbrowser.invokescript("execscript","document.addeventlistener('msgesturehold', eventlistener, false); document.addeventlistener('mspointerdown', eventlistener, false);  gesturehandler = new msgesture(); gesturehandler.target = document.body;");         } 

but second execscript raised error

 system.systemexception unhandled user code   hresult=-2146233087   message=an unknown error has occurred. error: 80020101.   source=microsoft.phone.interop   stacktrace:    @ microsoft.phone.controls.nativemethods.validatehresult(int32 hr)    @ microsoft.phone.controls.webbrowserinterop.invokescript(string scriptname, string[] args)    @ microsoft.phone.controls.webbrowser.invokescript(string scriptname, string[] args)    @ tabbed_browser.user_controls.webbrowser.attachcontextmenu()    @ tabbed_browser.user_controls.webbrowser.webbrowser_loaded(object sender, routedeventargs e)    @ ms.internal.coreinvokehandler.invokeeventhandler(int32 typeindex, delegate handlerdelegate, object sender, object args)    @ ms.internal.jolthelper.fireevent(intptr unmanagedobj, intptr unmanagedobjargs, int32 argstypeindex, int32 actualargstypeindex, string eventname)   innerexception:  

i've tried following, based on posting. apparently work in wp7 phone not in wp8 or emulator.

public void attachcontextmenu()     {         try         {             if (webbrowser.isscriptenabled)             {                 webbrowser.invokescript("execscript", "function findparentlink(item) \r\n{\r\n\tif (!item.parentnode)\r\n\t\treturn null;\r\n\tif (item.tagname.tolowercase() == 'a') \r\n\t{\r\n\t\treturn item;\r\n\t} \r\n\telse \r\n\t{\r\n\t\treturn findparentlink(item.parentnode);\r\n\t}\r\n}\r\n\r\nfunction findparentimage(item) \r\n{\r\n\tif (!item.parentnode)\r\n\t\treturn null;\r\n\tif (item.tagname.tolowercase() == 'img') \r\n\t{\r\n\t\treturn item;\r\n\t} \r\n\telse \r\n\t{\r\n\t\treturn findparentimage(item.parentnode);\r\n\t}\r\n}\r\n\r\nfunction handlecontextmenu() \r\n{\r\n\tvar linkitem = findparentlink(event.srcelement);\r\n    var imageitem = findparentimage(event.srcelement);\r\n    var notifyoutput = '';\r\n    if (linkitem != null) if (linkitem.href != null) notifyoutput += linkitem.href;\r\n    if (imageitem != null) if (imageitem.src != null) notifyoutput += imageitem.src;\r\n    if (notifyoutput != '')\r\n        window.external.notify(notifyoutput);\r\n    else\r\n\t\twindow.external.notify('notlinkimg');\r\n}");                 webbrowser.invokescript("execscript", "document.oncontextmenu = handlecontextmenu;");             }         }         catch         {         }     } 

i monitor result via scriptnotify never fired

    private void webbrowser_scriptnotify(object sender, notifyeventargs e)     {         debug.writeline(e.value.tostring());     } 

anyone know how attach context menu in wp8 browser control?

edit

i've found info window.navigator.mspointerenabled false on webbrowser control , true on internet explorer application. mean can't implement touch event detection in control. can set enabled?

if window.navigator.mspointerenabled false ,you can use onmousedown , onmouseup monitor