Working with OData and WinJS ListView in Metro Application

In this post we will see how to consume Netflix OData feed in HTML based Metro Application. Movies information will be displayed as following. At the end of this post, we should have output as below,

image

Netflix exposed all movies information as OData and that is publicly available to use. Netflix OData feed of movies are available at following location

http://odata.netflix.com/Catalog/

Essentially we will pull movies information from Netflix and bind it to ListView Control of WinJS. We will start with creating a blank application.

image

In the code behind (default.js) define a variable of type WinJS List.

image

Now we need to fetch the movies detail from Netflix. For this we will use xhr function of WinJS. As the parameter of function, we will have to provide URL of the OData feed.

image

In above code snippet, we are performing following tasks

  • Making a call to Netflix OData using WinJS .xhr function
  • As input parameter to xhr function, we are passing exact url of OData endpoint.
  • We are applying projection and providing JSON format information in URL itself.
  • Once JSON data is fetched form Netflix server data is being parsed and pushed as individual items in the WinJS list.

As of now we do have data with us. Now let us go ahead and create a ListView control. You can create WinJS ListView as following. Put below code on the default.html

clip_image002

In above code we are simply creating a WinJS ListView and setting up some basic attributes like layout and itemTemplate. Now we need to create Item Template. Template is used to format data and controls how data will be displayed. Template can be created as following

image

In above code, we are binding data from the data source to different HTML element controls. At last in code behind we need to set the data source of ListView

image

Before you go ahead and run the application just put some CSS to make ListView more immersive. Put below CSS in default.css

image

Now go ahead and run the application. You should be getting the expected output as following

image

Let us consolidate all the codes from discussion.

Default.html

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8" />
 <title>testdemo</title>

<!-- WinJS references -->
 <link href="//Microsoft.WinJS.1.0.RC/css/ui-dark.css" rel="stylesheet" />
 <script src="//Microsoft.WinJS.1.0.RC/js/base.js"></script>
 <script src="//Microsoft.WinJS.1.0.RC/js/ui.js"></script>

<!-- testdemo references -->
 <link href="/css/default.css" rel="stylesheet" />
 <script src="/js/default.js"></script>
</head>
<body>
 <h1>Netflix Movie Application</h1>
 <div id="moviesTemplate"
 data-win-control="WinJS.Binding.Template">
 <div style="width: 150px; height: 130px;">
 <img src="#" style="width: 100px; height: 100px;"
 data-win-bind="alt: title; src: picture" />
 <div>
 <h4 data-win-bind="innerText:title"></h4>
 </div>
 </div>
 </div>

<div id="movieListView"
 data-win-control="WinJS.UI.ListView"
 data-win-options="{itemTemplate : moviesTemplate,
 layout: {type: WinJS.UI.GridLayout} }">
 </div>

</body>
</html>

Code behind will have following codes

Default.js


// For an introduction to the Blank template, see the following documentation:
// http://go.microsoft.com/fwlink/?LinkId=232509
(function () {
 "use strict";

 var app = WinJS.Application;
 var activation = Windows.ApplicationModel.Activation;
 WinJS.strictProcessing();
 var movieArray = new WinJS.Binding.List();
 app.onactivated = function (args) {

 if (args.detail.kind === activation.ActivationKind.launch) {
 if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) {
 // TODO: This application has been newly launched. Initialize
 // your application here.
 } else {
 // TODO: This application has been reactivated from suspension.
 // Restore application state here.
 }
 args.setPromise(WinJS.UI.processAll());

 WinJS.xhr({
 url: "http://odata.netflix.com/Catalog/Titles" +
 "?$format=json&$select=ShortName,BoxArt&$top=300"
 }).then(function (xhr) {
 var movies = JSON.parse(xhr.response).d;
 movies.forEach(function (i) {
 movieArray.push({
 title: i.ShortName,
 picture: i.BoxArt.MediumUrl
 });
 });
 });
 var lstMovies = document.getElementById("movieListView").winControl;
 lstMovies.itemDataSource = movieArray.dataSource;

 }
 };

app.oncheckpoint = function (args) {

 };

app.start();
})();

And CSS will be as following

default.css


body {
}

@media screen and (-ms-view-state: fullscreen-landscape) {
}

@media screen and (-ms-view-state: filled) {
}

@media screen and (-ms-view-state: snapped) {
}

@media screen and (-ms-view-state: fullscreen-portrait) {
}
.win-listview
 {
 height: 100%;
 width: auto;

 }
 .win-listview .win-container {
 margin: 10px;
 }
 .win-listview .win-container:hover {
 background-color: red;
 border-color: red;
 }
 .semanticZoomItem
{
 width: 130px;
 height: 130px;
 background-color: rgba(38, 160, 218, 1.0);
}

.semanticZoomItem .semanticZoomItem-Text
 {
 padding: 10px;
 line-height: 150px;
 white-space: nowrap;
 color: white;
 }

In this way we can work with OData and winJS ListView. I hope you find this post useful. Thanks for reading.

3 thoughts on “Working with OData and WinJS ListView in Metro Application

  1. Pingback: Dew Drop – July 27, 2012 (#1,373) | Alvin Ashcraft's Morning Dew

  2. Pingback: Geek Reading July 27, 2012 | Regular Geek

  3. This is nice article…exactly looking for this… Do you have any sample on Grid view with grouping in similar way?

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