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Login Windows Store Apps

By Deepak Middha on Dec 04, 2012
In this article I described how to create a Windows Store App for Login using JavaScript.

Introduction

In this article I describe how to create Windows Store Apps for Login using JavaScript. If a command requires a small amount of user input before it can be completed, you can collect that information in a flyout.

I assume you can create a simple Windows Store App using JavaScript; for more help visit Simple Windows Store Apps using JavaScript.

To start the creation of the apps, add one JavaScript page by right-clicking on the js folder in the Solution Explorer and select Add > new item > JavaScript Page and then provide an appropriate name. In the same way, add a HTML page to your project.

login-windows-store-apps.jpg

Write the following code in the default.html:

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <title>app</title>

    <link rel="stylesheet" href="//Microsoft.WinJS.1.0/css/ui-light.css" />

    <script src="//Microsoft.WinJS.1.0/js/base.js"></script>

    <script src="//Microsoft.WinJS.1.0/js/ui.js"></script>

    <link rel="stylesheet" href="/css/default.css" />

    <script src="/js/default.js"></script>

</head>

<body role="application" style="background-color: lightcyan">

    <center><div id="rootGrid">

        <div id="content">

            <h1 id="featureLabel"></h1>

            <div id="contentHost"></div>

        </div>

    </div></center>

</body>

</html>


Write the following code in the default.js:

(function () {

    "use strict";

    var appTitle = "";

    var pages = [

        { url: "page.html" }

    ];

    function activated(eventObject) {

        if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) {

            eventObject.setPromise(WinJS.UI.processAll().then(function () {

                var url = WinJS.Application.sessionState.lastUrl || pages[0].url;

                return WinJS.Navigation.navigate(url);

            }));

        }

    }

    WinJS.Navigation.addEventListener("navigated", function (eventObject) {

        var url = eventObject.detail.location;

        var host = document.getElementById("contentHost");

        host.winControl && host.winControl.unload && host.winControl.unload();

        WinJS.Utilities.empty(host);

        eventObject.detail.setPromise(WinJS.UI.Pages.render(url, host, eventObject.detail.state).then(function () {

            WinJS.Application.sessionState.lastUrl = url;

        }));

    });

    WinJS.Namespace.define("App", {

        appTitle: appTitle,

        pages: pages

    });

    WinJS.Application.addEventListener("activated", activated, false);

    WinJS.Application.start();

})();


Write the following code in the page.html:

<!DOCTYPE html>

<html>

<head>

    <title></title>

    <link rel="stylesheet" href="/css/collect-information.css" />

    <script src="/js/script.js"></script>

</head>

<body>

    <div data-win-control="App.pageInput">

        <p>

            Click the "Login" button to launch the user login flyout.

        </p>

        <button id="loginButton">

            Login</button>

    </div>

    <div data-win-control="App.pageOutput">

    </div>

    <div id="loginFlyout" data-win-control="WinJS.UI.Flyout" aria-label="{Login flyout}">

        <form onsubmit="return false;">

            <p>

                <label for="username">

                    Username

                    <br />

                </label>

                <span id="usernameError" class="error"></span>

                <input type="text" id="username" />

            </p>

            <p>

                <label for="password">

                    Password<br />

                </label>

                <span id="passwordError" class="error"></span>

                <input type="password" id="password" />

            </p>

            <button id="submitLoginButton">

                Login</button>

        </form>

    </div>

</body>

</html>


Write the following code in the script.html:

(function () {

    var loggedIn;

    "use strict";

    var page = WinJS.UI.Pages.define("page.html", {

        ready: function (element, options) {

            document.getElementById("loginButton").addEventListener("click", showLoginFlyout, false);

            document.getElementById("submitLoginButton").addEventListener("click", submitLogin, false);

            document.getElementById("loginFlyout").addEventListener("afterhide", onDismiss, false);

        }

    });

    function showLoginFlyout() {

        loggedIn = false;

        WinJS.log && WinJS.log("", "app", "status", "status");

 

        var loginButton = document.getElementById("loginButton");

        document.getElementById("loginFlyout").winControl.show(loginButton);

    }

    function submitLogin() {

        var error = false;

        if (document.getElementById("password").value.trim() === "") {

            document.getElementById("passwordError").innerHTML = "Password cannot be blank";

            document.getElementById("password").focus();

            error = true;

        } else {

            document.getElementById("passwordError").innerHTML = "";

        }

        if (document.getElementById("username").value.trim() === "") {

            document.getElementById("usernameError").innerHTML = "Username cannot be blank";

            document.getElementById("username").focus();

            error = true;

        } else {

            document.getElementById("usernameError").innerHTML = "";

        }

 

        if (!error) {

            loggedIn = true;

            WinJS.log && WinJS.log("You have logged in.", "app", "status");

            document.getElementById("loginFlyout").winControl.hide();

        }

    }

    function onDismiss() {

        document.getElementById("username").value = "";

        document.getElementById("usernameError").innerHTML = "";

        document.getElementById("password").value = "";

        document.getElementById("passwordError").innerHTML = "";

        if (!loggedIn) {

            WinJS.log && WinJS.log("You have not logged in.", "app", "status");

        }

    }

})();


Output:

login-windows-store-app.jpg

Summary

In this article I described how to create a Windows Store App for Login using JavaScript. I hope this article has helped you to understand this topic. Please share it. If you know more about this, your feedback and constructive contributions are welcome.

 

Deepak Middha

Deepak Middha is one time Microsoft MVP(Client App Dev) , working as Sr. Software Developer with lots of hands on experience using ASP.NET 2.0/3.5, AJAX, MVC, C#,  SQL Server 2005/2008/2012, WCF, JQuery and Silverl... Read more

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