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Setting Container in WIndows Store

By Deepak Middha on Nov 02, 2012
In this app I described Setting Containers in a Windows Store App using JavaScript.

Introduction

In this article I describe how to create a Windows Store App for setting Containers using JavaScript. Setting containers are essentially groups of settings. They are useful for organization. Use flowing
to read, write, and delete a setting container.

  1. Windows.Storage.ApplicationData.current.localSettings.createContainer
  2. Windows.Storage.ApplicationData.current.localSettings.deleteContainer

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 app, add two JavaScript pages by right-clicking on the js folder in the Solution Explorer and select Add > new item > JavaScript Page and then give an appropriate name. In the same way, add one HTML page to your project.

roaming-setting-in-windows-store-app.jpg


Write the following code in default.html:

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <title></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/script1.js"></script>

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

</head>

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

    <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 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 page.html:
 

<!DOCTYPE html>

<html>

<head>

    <title></title>

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

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

</head>

<body>

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

        <button id="containersCreateContainer">Create</button>

        <button id="containersDeleteContainer">Delete</button>

        <button id="containersWriteSetting">Write setting</button>

        <button id="containersDeleteSetting">Delete setting</button>

    </div>

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

        <div class="item" id="containersOutput"></div>

    </div>

</body>

</html> 


Write the following code in script.js:
 

(function () {

    "use strict";

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

        ready: function (element, options) {

            document.getElementById("containersCreateContainer").addEventListener("click", containersCreateContainer, false);

            document.getElementById("containersDeleteContainer").addEventListener("click", containersDeleteContainer, false);

            document.getElementById("containersWriteSetting").addEventListener("click", containersWriteSetting, false);

            document.getElementById("containersDeleteSetting").addEventListener("click", containersDeleteSetting, false);

            containersDisplayOutput();

        }

    });

    var localSettings = Windows.Storage.ApplicationData.current.localSettings;

    var containerName = "exampleContainer";

    var settingName = "exampleSetting";

    function containersCreateContainer() {

        var container = localSettings.createContainer(containerName, Windows.Storage.ApplicationDataCreateDisposition.always);

        containersDisplayOutput();

    }

    function containersDeleteContainer() {

        localSettings.deleteContainer(containerName);

 

        containersDisplayOutput();

    }

    function containersWriteSetting() {

        if (localSettings.containers.hasKey(containerName)) {

            localSettings.containers.lookup(containerName).values[settingName] = "Hello World"; // example value

        }

        containersDisplayOutput();

    }

    function containersDeleteSetting() {

        if (localSettings.containers.hasKey(containerName)) {

            localSettings.containers.lookup(containerName).values.remove(settingName);

        }

        containersDisplayOutput();

    }

    function containersDisplayOutput() {

        var hasContainer = localSettings.containers.hasKey(containerName);

        var hasSetting = hasContainer ? localSettings.containers.lookup(containerName).values.hasKey(settingName) : false;

        document.getElementById("containersOutput").innerText = "Container Exists: " + hasContainer + "\nSetting Exists: " + hasSetting;

    }

})(); 


Write the following code in script1.js:
 

(function () {

    var pageOutput = WinJS.Class.define(

        function (element, options) {

            element.winControl = this;

            this.element = element;

            new WinJS.Utilities.QueryCollection(element)

                        .setAttribute("role", "region")

                        .setAttribute("aria-labelledby", "outputLabel")

                        .setAttribute("aria-live", "assertive");

            element.id = "output";

 

            this._addOutputLabel(element);

            this._addStatusOutput(element);

        }, {

            _addOutputLabel: function (element) {

                var label = document.createElement("h2");

                label.id = "outputLabel";

                label.textContent = "";

                element.parentNode.insertBefore(label, element);

            },

            _addStatusOutput: function (element) {

                var statusDiv = document.createElement("div");

                statusDiv.id = "statusMessage";

                element.insertBefore(statusDiv, element.childNodes[0]);

            }

        }

    );

    var currentpageUrl = null;

    WinJS.Navigation.addEventListener("navigating", function (evt) {

        currentpageUrl = evt.detail.location;

    });

 

    WinJS.log = function (message, tag, type) {

        var statusDiv = document.getElementById("statusMessage");

    };

    function activated(e) {

        WinJS.Utilities.query("#featureLabel")[0].textContent = App.appTitle;

    }

 

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

    WinJS.Namespace.define("App", {

        pageOutput: pageOutput

    });

})();


Output:

setting-container-in-windows-store-app.jpg

Summary


In this app I described setting Containers in a Windows Store App using JavaScript. I hope this article has helped you to understand this topic. Please share 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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