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PODe-serializing object in MVC4 action results in null values
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copied!<p>I am using jQuery 1.9.1 and MVC 4.</p> <p>I have the following javascript:</p> <pre><code>$.ajax({ url: '/Home/doSomething', type: 'POST', data: JSON.stringify({ devices: [{ Id: 123, Name: "something", MapName: "map" },{ Id: 321, Name: "a name", MapName: "another map" }] }), dataType: 'json', contentType: 'application/json' } </code></pre> <p>And the following c# in my HomeController:</p> <pre><code>[HttpPost] public string doSomething( Device[ ] devices ) { //stuff consuming that array } </code></pre> <p>The Device class is defined like this:</p> <pre><code>[Serializable] public class Device { public long Id; public string Name; public string MapName; } </code></pre> <p>According to the debugger, the devices array is a 2-element array with all properties of each Device element being null.</p> <p>According to chrome, the post data looks like this:</p> <pre><code>{ "devices": [ { "Id": 123, "Name": "something", "MapName": "map" }, { "Id": 321, "Name": "a name", "MapName": "another map" } ] } </code></pre> <p>What is wrong here that is making MVC swear up and down that those objects are null, yet still giving me an appropriate-length array of them?</p> <p>I have tried posting the array directly, without calling JSON.stringify on it. I have tried posting the array inside an object as a property called "devices", again without strigifying it. I have tried posting the array inside an object as a property called "devices", while only stringifying the array itself.</p> <p>All of these result in bad behavior of one form or another. Either chrome does not post the appropriate data in the first place, or MVC does not de-serialize it.</p> <p>I have scoured the web and can't seem to find any examples of why this should be broken.</p> <p><strong>Edit 2013-02-21 13:12 UTC-5:</strong></p> <p>I have also tried this without using JSON and just letting jQuery post it as form data. Here is the code for that:</p> <pre><code>var postData = { devices: [{ Id: 123, Name: "something", MapName: "map" }, { Id: 321, Name: "a name", MapName: "another map" }] }; $.ajax({ url: '/Home/doSomething', type: 'POST', data: postData }); </code></pre> <p>And the C# is still the same as above.</p> <p>The behavior is still the same as when it was JSON, though. MVC sees an array of 2 elements, but all values of the objects in that array are default (0 for the integer and null for the strings).</p>

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