windows phone 8 - Access intranet portal using Uri Launcher -

how open webpage tile click event in windows 8 grid app? have tried modifying event handler error expects text value.

i have used following code works if enter value manually want value data source.

   void itemview_itemclick(object sender, itemclickeventargs e)     {         // navigate appropriate destination page, configuring new page         // passing required information navigation parameter       var itemid = ((sampledataitem)e.clickeditem).url;     //  this.frame.navigate(typeof(itemdetailpage), itemid);        launcher.launchuriasync(new uri(itemid));      } 

update: figured out why doesnt work, pointing intranet page link, knows how fix it?