javascript - Extract email address from Google account -


i'm working on website client has asked option allow signup/login using google , facebook accounts. how can extract email address user's google profile storing in database?

here code. problem not getting user profile completely. instead, receiving user name.

try {      webclient client = new webclient();      var urlprofile = "https://www.googleapis.com/oauth2/v1/userinfo?access_token="          + access_token;       string outputdata = client.downloadstring(urlprofile);       googleuseroutputdata serstatus =          jsonconvert.deserializeobject<googleuseroutputdata>(outputdata);       if (serstatus != null)      {          return serstatus;          // user information here.      }  }  catch (exception ex)  {      //catching exception  }   return null;

here way receive data (email, etc.) in javascript. @ end shows alert data. (you can store data in database.) it's complete working example google button.

<html>    <head>     <title>demo: getting email address using google+ sign-in button</title>     <!-- include api client , google+ client. -->     <script src = "https://plus.google.com/js/client:platform.js" async defer></script>   </head>    <body>     <!-- container sign-in button. -->     <div id="gconnect" class="button">       <button class="g-signin"           data-scope="email"           data-clientid="your_client_id"           data-callback="onsignincallback"           data-theme="dark"           data-cookiepolicy="single_host_origin">       </button>       <!-- textarea outputting data -->       <div id="response" class="hide">         <textarea id="responsecontainer" style="width:100%; height:150px"></textarea>       </div>     </div>  </body>    <script>   /**    * handler signin callback triggered after user selects account.    */       function onsignincallback(resp) {      gapi.client.load('plus', 'v1', apiclientloaded);   }    /**    * sets api call after google api client loads.    */       function apiclientloaded() {      gapi.client.plus.people.get({userid: 'me'}).execute(handleemailresponse);   }    /**    * response callback when api client receives response.    *    * @param resp api response object user email , profile information.    */   function handleemailresponse(resp) {       var primaryemail;       var name;       var gender;      (var i=0; < resp.emails.length; i++) {         if (resp.emails[i].type === 'account')             primaryemail = resp.emails[i].value;         if (resp.displayname != null)             name = resp.displayname;         gender = resp.gender;     }     document.getelementbyid('responsecontainer').value = 'primary email: ' +           primaryemail + '\n\nfull response:\n' + json.stringify(resp);       showalert("email: "+primaryemail +" "+"name: "+ resp.displayname +" "+"gender: "+gender);   }    </script>  </html>

for further information , detail can (should) read link: getting people , profile information


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