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Login Windows Store Apps

Posted by Deepak Arora Articles | Windows Store Apps December 04, 2012
In this article I described how to create a Windows Store App for Login using JavaScript.
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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.

 

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