Introduction
In this article I describe how to create Windows Store Apps for sending data to a server using JavaScript. You can send data to the "server". Sending data is often done with the Data-writer object; it will write to the socket stream.
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.
Write the following code in the 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/default.js"></script>
</head>
<body role="application" style="background-color: lightgoldenrodyellow">
<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 = "DatagramSocket";
var pagess = [
{ url: "page.html", title: "Close Socket" }
];
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 xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="/js/script.js"></script>
</head>
<body>
<div data-win-control="App.pageInput">
<p>
<button id="buttonSend">Send 'hello'</button>
</p>
</div>
<div data-win-control="App.pageOutput">
<p id="statusBox"></p>
<p id="outputBox"></p>
</div>
</body>
</html>
Write the following code in the script.js:
(function () {
"use strict";
var page = WinJS.UI.Pages.define("page.html", {
ready: function (element, options) {
document.getElementById("buttonSend").addEventListener("click", sendHello, false);
}
});
function sendHello() {
if (!socketsapp.connected) {
socketsapp.displayStatus("Client: you must connect the client before using it.");
return;
}
if (!socketsapp.clientDataWriter) {
socketsapp.clientDataWriter = new Windows.Storage.Streams.DataWriter(socketsapp.clientSocket.outputStream);
}
var string = "Hello World";
socketsapp.clientDataWriter.writeString(string);
socketsapp.displayStatus("Client sending: " + string + ".");
socketsapp.clientDataWriter.storeAsync().done(function () {
socketsapp.displayStatus("Client sent: " + string + ".");
}, onError);
}
function onError(reason) {
if (!socketsapp.closing) {
socketsapp.displayStatus(reason);
}
}
})();
Output:
Summary
In this article I described how to create a Windows Store App for sending data to the server 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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