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POIn an MVC 3 Application, how do I do a simple AJAX/JSON round trip of DateTimes and TimeSpans?
 

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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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    <p>Given a simple round tripping scenario, how can I return JSON data to a browser and then accept updates from the browser via JSON that ModelBinds to a type w/ 3 properties: Int32, DateTime, TimeSpan?</p> <p>Server Code (Controller)</p> <pre><code> public class Product { public int Id { get; set; } public DateTime Start { get; set; } public TimeSpan Duration { get; set; } } [AcceptVerbs(HttpVerbs.Get)] public JsonResult data() { return Json( new Product { Id = 1, Start = DateTime.Now, Duration = TimeSpan.FromMinutes(30)} , JsonRequestBehavior.AllowGet); } [HttpPost] public void data(Product product) { //product is not bound; modelbinder fails on DateTime and TimeSpan Console.WriteLine("Data: " + product); } </code></pre> <p>Errors from Immediate Window</p> <pre><code>ModelState["Start"].Errors[0] {System.Web.Mvc.ModelError} ErrorMessage: "The value '/Date(1302295231115)/' is not valid for Start." Exception: null ModelState["Duration"].Errors[0] {System.Web.Mvc.ModelError} ErrorMessage: "The Duration field is required." Exception: null </code></pre> <p>Client Code (getData and changeData are bound to 2 different buttons)</p> <pre><code>&lt;script type='text/javascript'&gt; var myData; function getData(event) { $.getJSON('/home/data', function (data) { myData=data; console.dir(data); }); } 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 () { console.log('success!'); }, error: function () { console.log('fail!'); } }); } $(document).ready(function () { $('#get').click(getData); $('#post').click(changeData); } &lt;/script&gt; &lt;body&gt; &lt;button id="get" onclick="return(false);"&gt;get&lt;/button&gt; &lt;button id="post" onclick="return(false);"&gt;post&lt;/button&gt; &lt;/body&gt; </code></pre> <p><strong>Update March 2012</strong></p> <p>Looks like the upcoming <a href="http://www.hanselman.com/blog/OnTheNightmareThatIsJSONDatesPlusJSONNETAndASPNETWebAPI.aspx" rel="nofollow">Microsoft WebAPI will serialize to ISO8601</a> thanks to Scott Hanselman and <a href="https://github.com/JamesNK/Newtonsoft.Json/commit/fd760e33898cc6b3badaf4a8b77a466139b87fac" rel="nofollow">James Newton-King</a></p>
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