jQuery Mobile: Sending data from one page to the another
i have a problem, i need to send data (an id) from a list to another page. this is the html code:
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One HTML / multiple pages template
Here's an example of passing an attribute from listview to the second page in 1 html multi page template:
http://jsfiddle.net/Gajotres/Gv7UW/ - js object as a storage container
http://jsfiddle.net/Gajotres/J9NTr/ - localStorage as a storage container
Basically what you want to do is create a persistent javascript object for a storage purpose. As long ajax is used for page loading (and page is not reloaded in any way) that object will stay active.
var storeObject = { firstname : '', lastname : '' }Multiple HTML pages template
Unfortunately this example can't be done through jsFiddle so I will post needed files:
HTML 1 :
<!DOCTYPE html> <html> <head> <title>jQM Complex Demo</title> <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0"/> <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" /> <script src="http://code.jquery.com/jquery-1.8.3.min.js"></script> <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script> <script src="operations.js"></script> </head> <body> <div data-role="page" id="index"> <div data-theme="a" data-role="header"> <h3> First Page </h3> <a href="#second" class="ui-btn-right">Next</a> </div> <div data-role="content"> <ul data-role="listview" data-theme="a" id="test-listview"> <li><a href="page2.html?id=1">Link 1</a></li> <li><a href="page2.html?id=2">Link 2</a></li> <li><a href="page2.html?id=3">Link 3</a></li> <li><a href="page2.html?id=4">Link 4</a></li> <li><a href="page2.html?id=5">Link 5</a></li> </ul> </div> <div data-theme="a" data-role="footer" data-position="fixed"> </div> </div> </body> </html>HTML 2 :
<!DOCTYPE html> <html> <head> <title>jQM Complex Demo</title> <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0"/> <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" /> <script src="http://code.jquery.com/jquery-1.8.3.min.js"></script> <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script> </head> <body> <div data-role="page" id="second"> <div data-theme="a" data-role="header"> <h3> Second Page </h3> <a href="#index" class="ui-btn-left">Back</a> </div> <div data-role="content"> </div> <div data-theme="a" data-role="footer" data-position="fixed"> </div> </div> </body> </html>operations.js :
$(document).on('pageshow', '#second', function(){ alert(getParameterByName("id")); }); function getParameterByName(name) { return decodeURI( (RegExp(name + '=' + '(.+?)(&|$)').exec(location.search)||[,null])[1] ); }User authentication demo
Another example that can't be shown with a jsFiddle example, unlike previous one, this one will have attached SQL script. I would advise you to create a better db reading logic, this one is a simple solution, prone to SQL injection, but it will work well for your assignment:
index.php :
<!DOCTYPE html> <html> <head> <title>jQM Complex Demo</title> <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0"/> <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" /> <style> #login-button { margin-top: 30px; } </style> <script src="http://www.dragan-gaic.info/js/jquery-1.8.2.min.js"></script> <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script> <script src="js/custom.js"></script> </head> <body> <div data-role="page" id="login"> <div data-theme="a" data-role="header"> <h3>Login Page</h3> </div> <div data-role="content"> <label for="username">Enter your username:</label> <input type="text" value="" name="username" id="username"/> <label for="password">Enter your password:</label> <input type="password" value="" name="password" id="password"/> <a data-role="button" id="login-button" data-theme="b">Login</a> </div> <div data-theme="a" data-role="footer" data-position="fixed"> </div> </div> <div data-role="page" id="index"> <div data-theme="a" data-role="header"> <h3></h3> </div> <div data-role="content"> Here goes content </div> <div data-theme="a" data-role="footer" data-position="fixed"> <h3>Page footer</h3> </div> </div> </body> </html>json.php :
<?php $var1 = $_REQUEST['action']; // We dont need action for this tutorial, but in a complex code you need a way to determine ajax action nature $jsonObject = json_decode($_REQUEST['outputJSON']); // Decode JSON object into readable PHP object $username = $jsonObject->{'username'}; // Get username from object $password = $jsonObject->{'password'}; // Get password from object mysql_connect("localhost","root",""); // Conect to mysql, first parameter is location, second is mysql username and a third one is a mysql password @mysql_select_db("test") or die( "Unable to select database"); // Connect to database called test $query = "SELECT * FROM users WHERE user_name = '".$username."' and user_pass = '".$password."'"; $result=mysql_query($query); $num = mysql_numrows($result); if($num != 0) { echo "true"; } else { echo "false"; } ?>custom.js :
$(document).on('pagebeforeshow', '#login', function(){ $('#login-button').on('click', function(){ if($('#username').val().length > 0 && $('#password').val().length > 0){ userObject.username = $('#username').val(); // Put username into the object userObject.password = $('#password').val(); // Put password into the object // Convert an userObject to a JSON string representation var outputJSON = JSON.stringify(userObject); // Send data to server through ajax call // action is functionality we want to call and outputJSON is our data ajax.sendRequest({action : 'login', outputJSON : outputJSON}); } else { alert('Please fill all nececery fields'); } }); }); $(document).on('pagebeforeshow', '#index', function(){ if(userObject.username.length == 0){ // If username is not set (lets say after force page refresh) get us back to the login page $.mobile.changePage( "#login", { transition: "slide"} ); // In case result is true change page to Index } $(this).find('[data-role="header"] h3').append('Wellcome ' + userObject.username); // Change header with wellcome msg //$("#index").trigger('pagecreate'); }); // This will be an ajax function set var ajax = { sendRequest:function(save_data){ $.ajax({url: 'http://localhost/JSONP_Tutorial/json.php', data: save_data, async: true, beforeSend: function() { // This callback function will trigger before data is sent $.mobile.showPageLoadingMsg(true); // This will show ajax spinner }, complete: function() { // This callback function will trigger on data sent/received complete $.mobile.hidePageLoadingMsg(); // This will hide ajax spinner }, success: function (result) { if(result == "true") { $.mobile.changePage( "#index", { transition: "slide"} ); // In case result is true change page to Index } else { alert('Login unsuccessful, please try again!'); // In case result is false throw an error } // This callback function will trigger on successful action }, error: function (request,error) { // This callback function will trigger on unsuccessful action alert('Network error has occurred please try again!'); } }); } } // We will use this object to store username and password before we serialize it and send to server. This part can be done in numerous ways but I like this approach because it is simple var userObject = { username : "", password : "" }localhost.sql :
-- phpMyAdmin SQL Dump -- version 3.4.10.1 -- http://www.phpmyadmin.net -- -- Host: localhost -- Generation Time: Feb 02, 2013 at 11:58 AM -- Server version: 5.5.20 -- PHP Version: 5.3.10 SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO"; SET time_zone = "+00:00"; /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; -- -- Database: `test` -- CREATE DATABASE `test` DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci; USE `test`; -- -------------------------------------------------------- -- -- Table structure for table `users` -- CREATE TABLE IF NOT EXISTS `users` ( `user_id` int(11) NOT NULL AUTO_INCREMENT, `user_name` varchar(64) NOT NULL, `user_pass` varchar(64) NOT NULL, PRIMARY KEY (`user_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ; -- -- Dumping data for table `users` -- INSERT INTO `users` (`user_id`, `user_name`, `user_pass`) VALUES (1, 'gajotres', 'testpass'); /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;More info
If you want to learn more about this topic take a look at this article. You will find several solutions with examples.
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