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copied!<pre><code>ko.bindingHandlers['winjsDatePicker'] = { init: function (element, valueAccessor, allBindingsAccessor) { var value = valueAccessor(), allBindings = allBindingsAccessor(), options = allBindings['winjsDatePickerOptions'] || {}; options['current'] = value; // Flatten the options for DatePicker var dpOptions = {}; ko.utils.arrayForEach([ 'calendar', 'current', 'datePattern', 'disabled', 'element', 'maxYear', 'minYear', 'monthPattern', 'yearPattern' ], function (prop) { if (options.hasOwnProperty(prop)) { dpOptions[prop] = ko.utils.unwrapObservable(options[prop]); } }); // Use jQuery to store the value-observable with the element $(element).data('winjsDatePickerCurrent', value); // Create the DatePicker, and pass it the options var dp = new WinJS.UI.DatePicker(element, dpOptions); // Wire up the onchange event dp.addEventListener("change", function() { var value = $(element).data('winjsDatePickerCurrent'); if (ko.isWriteableObservable(value)) { value(dp.current); } }); }, update: function (element, valueAccessor, allBindingsAccessor) { var dp = element.winControl, value = valueAccessor(), allBindings = allBindingsAccessor(), options = allBindings['winjsDatePickerOptions'] || {}; options['current'] = value; // Update the value-observable $(element).data('winjsDatePickerCurrent', value); // Update any properties ko.utils.arrayForEach([ 'calendar', 'current', 'datePattern', 'disabled', 'element', 'maxYear', 'minYear', 'monthPattern', 'yearPattern' ], function (prop) { if (options[prop] !== undefined) { dp[prop] = ko.utils.unwrapObservable(options[prop]); } }); } }; </code></pre> <pre class="lang-html prettyprint-override"><code><div data-bind="winjsDatePicker: date"></div> <div data-bind="winjsDatePicker: date, winjsDatePickerOptions: { minYear: 2012 }"></div> </code></pre> <p><a href="http://jsfiddle.net/MizardX/rs8Cd/" rel="nofollow">http://jsfiddle.net/MizardX/rs8Cd/</a></p>

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