Introduction
Today we are going to learn how to create a Windows Store App tor pick a Contact using JavaScript. This app demonstrates how to use the Contact Picker to select one contact. It includes a basic implementation of the Contact Picker APIs to demonstrate how to display a list of contacts to the user.
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.
![contact-picker-windows-store-apps.jpg]()
Write the following code in default.html:
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>App</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/script.js"></script>
    <script src="/js/default.js"></script>
</head>
<body role="application"style="background-color:gray">
    <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("Apps", {
        appTitle: appTitle,
        pages: pages
    });
    WinJS.Application.addEventListener("activated", activated, false);
    WinJS.Application.start();
})(); 
Write the following code in page.html:
 
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script src="/js/script.js"></script>
    <link rel="stylesheet" href="/css/pageSingle.css" />
</head>
<body>
    <div data-win-control="Apps.pageInput">
       <button id="open">Pick contact</button>
        <br /><br />
    </div>
    <div data-win-control="Apps.pageOutput">
    </div>
</body>
</html> 
Write the following code in script.html:
 
(function () {
    "use strict";
    var page = WinJS.UI.Pages.define("page.html", {
        ready: function (element, options) {
            document.getElementById("open").addEventListener("click", pickContact, false);
        }
    });
 
    function pickContact() {
        WinJS.log && WinJS.log("", "app", "status");
        var viewState = Windows.UI.ViewManagement.ApplicationView.value;
        if (viewState === Windows.UI.ViewManagement.ApplicationViewState.snapped &&
            !Windows.UI.ViewManagement.ApplicationView.tryUnsnap()) {
            return;
        };
        var picker = new Windows.ApplicationModel.Contacts.ContactPicker();
        picker.commitButtonText = "Select";
        picker.pickSingleContactAsync().done(function (contact) {
            if (contact !== null) {
                var contactElement = document.createElement("div");
                contactElement.className = "contact";
                contactElement.appendChild(createTextElement("h3", contact.name));
                appendFields("Emails:", contact.emails, contactElement);
                appendFields("Phone Numbers:", contact.phoneNumbers, contactElement);
                appendFields("Addresses:", contact.locations, contactElement);
                document.getElementById("output").appendChild(contactElement);
            } else {
                WinJS.log && WinJS.log("No contact was selected", "app", "status");
            }
        });
    }
 
    function appendFields(title, fields, container) {
        fields.forEach(function (field) {
            if (field.value) {               
                if (title) {
                    container.appendChild(createTextElement("h4", title));
                    title = "";
                }
                switch (field.category) {
                    case Windows.ApplicationModel.Contacts.ContactFieldCategory.home:
                        container.appendChild(createTextElement("div", field.value + " (home)"));
                        break;
                    case Windows.ApplicationModel.Contacts.ContactFieldCategory.work:
                        container.appendChild(createTextElement("div", field.value + " (work)"));
                        break;
                    case Windows.ApplicationModel.Contacts.ContactFieldCategory.mobile:
                        container.appendChild(createTextElement("div", field.value + " (mobile)"));
                        break;
                    case Windows.ApplicationModel.Contacts.ContactFieldCategory.other:
                        container.appendChild(createTextElement("div", field.value + " (other)"));
                        break;
                    case Windows.ApplicationModel.Contacts.ContactFieldCategory.none:
                    default:
                        container.appendChild(createTextElement("div", field.value));
                        break;
                }
            }
        });
    }
    function createTextElement(tag, text) {
        var element = document.createElement(tag);
        element.className = "singleLineText";
        element.innerText = text;
        return element;
    }
 
})(); 
Write the following code in script1.html:
 
(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 = "Output";
             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 = Apps.appTitle;
    }
 
    WinJS.Application.addEventListener("activated", activated, false);
    WinJS.Namespace.define("Apps", {
        pageOutput: pageOutput
    });
})(); 
Output:
![contact-pick-windows-store-apps.jpg]()
Summary
In this app I described how to pick a contact in a Windows Store App 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.