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.
- Windows.Storage.ApplicationData.current.localSettings.createContainer
- 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.