Working With DatePicker Control in Windows 8 HTML5 Metro App


In this post I will show you, how to work with DatePicker control in HTML Metro App. The DatePicker controls comes as part of WinJS.

To use the DatePicker control, for the very first let us create a blank application.

DtPckrWin1.gif

Right click and open project in Expression Blend.

DtPckrWin2.gif

Choose Date Picker from Assets and put it below Body tag.

DtPckrWin3.gif

You can see in the liveDOM tab that Date Picker control is made up of various HTML elements. There are three Select tags being used to create Date Picker tag.

DtPckrWin4.gif

After dragging Date Picker control on the DOM, you can see HTML generated as below:

DtPckrWin5.gif

To set the basic properties you need to select div contains Date Picker control and then click Attributes tab in Properties window.

DtPckrWin6.gif

After setting value of maxYear and minYear, when you switch to HTML view, you will notice added attribute in Date Picker control as below:

DtPckrWin7.gif

You may notice in above HTML that in Head section of the HTML a WinJS function is being called. This function is responsible for processing all the WinJS controls. It is very much possible to move this WinJS function call from HTML page to JS page as below:

DtPckrWin8.gif

At this point of running of the application, you should be getting Date Picker control on the app page. Let us move ahead and read the selected value from the Date Picker control. For that give an ID to Date Picker control div and read it on js file using standard JavaScript function.

DtPckrWin9.gif

In this way you can display the selected date in result div. For your convenience the full source code for default.js is given below.

Default.js

(function(){
'use strict';
// Uncomment the following line to enable first chance exceptions.
// Debug.enableFirstChanceException(true);

WinJS.Application.onmainwindowactivated=function(e){

var result =document.getElementById("Result");
WinJS.UI.processAll().then(function(){

vardateFilterControl=document.getElementById("DatePickerDiv").winControl;
dateFilterControl.addEventListener("change",function(){
var month =dateFilterControl.current;
result.innerHTML= month;

});

});
if(e.detail.kind===Windows.ApplicationModel.Activation.ActivationKind.launch){
// TODO: startup code here
}
}
 
WinJS
.Application.start();
})();

Default.html is as below:

Default.html

<!DOCTYPEhtml>
<
html>
<
head>
<
metacharset="utf-8"/>
<
title>AppBarSample</title>
<!--WinJS references -->
<linkrel="stylesheet"href="/winjs/css/ui-dark.css"/>
<
scriptsrc="/winjs/js/base.js"></script>
<
scriptsrc="/winjs/js/wwaapp.js"></script>
<!--AppBarSample references -->
<linkrel="stylesheet"href="/css/default.css"/>
<
scriptsrc="/js/default.js"></script>
       <scriptsrc="/winjs/js/ui.js"type="text/javascript"></script>
       <scriptsrc="/winjs/js/controls.js"type="text/javascript"></script>

</head>
<
body>
<
h1>Date Picker Demo</h1>
       <divid="DatePickerDiv"data-win-control="WinJS.UI.DatePicker"
       data-win-options="{disabled:false,maxYear:2020,minYear:2001}">            
      
</div>
<
divid="Result">

</div>
</
body>
</
html>

I hope this post is useful. Thanks for reading.