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    <p>There's an issue with the way dates are handled. The <a href="http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx" rel="nofollow">JavaScriptSerializer</a> uses the following format when dealing with dates: <code>/Date(1302296382818)/</code> which unfortunately makes little sense to jQuery when parsing the GET JSON response so you don't get a real date on the client side but string. So you need a shameless hack in order to convert this string to a real date:</p> <pre><code>myData.Start = new Date(parseInt(data.Start.substr(6))); </code></pre> <p>And here's the full story of the hack:</p> <p>Model:</p> <pre><code>public class Product { public int Id { get; set; } public DateTime Start { get; set; } } </code></pre> <p>Controller:</p> <pre><code>public class HomeController : Controller { public ActionResult Index() { return View(); } public ActionResult Data() { var product = new Product { Id = 1, Start = DateTime.Now, }; return Json(product, JsonRequestBehavior.AllowGet); } [HttpPost] public ActionResult Data(Product product) { return Json(product); } } </code></pre> <p>View:</p> <pre><code>&lt;script type="text/javascript"&gt; var myData; function getData(event) { $.getJSON('/home/data', function (data) { myData = data; myData.Start = new Date(parseInt(data.Start.substr(6))); }); return false; } function changeData(event) { var postData = JSON.stringify(myData); $.ajax({ url: '/home/data', type: 'POST', data: postData, dataType: 'json', contentType: 'application/json; charset=utf-8', success: function (result) { console.log(result); } }); return false; } $(function () { $('#get').click(getData); $('#post').click(changeData); }); &lt;/script&gt; &lt;button id="get"&gt;get&lt;/button&gt; &lt;button id="post"&gt;post&lt;/button&gt; </code></pre> <p>Leaving the <code>TimeSpan</code> case as an exercise to the reader as it will require another shameless hack and I am tired of hacks :-)</p>
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    1. POIn an MVC 3 Application, how do I do a simple AJAX/JSON round trip of DateTimes and TimeSpans?
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    1. USDarin Dimitrov
    1. USDarin Dimitrov
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    1. COBrilliant. Thanks, Darin. That solves the DateTime issue. Now for the TimeSpan... ... ...
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    2. CO@Jason, left as an exercise :-)
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