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POasp.net mvc : custom ViewModel form post
 

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    <p>Just starting out with ASP.NET MVC and have come across a stumbling block already.</p> <p>The situation is that I have a custom ViewModel to pass to the view, which contains a list of items to be rated ( will be using the jQuery star rating ), so these are created using the radio button helper, to have the same name, just different value, and these render no problem.</p> <p>I have absolutely no idea how to actually get that back into the post version of my action, however. I just get a 'no parameterless constructor' error. I don't want to use the forms collection - I want my data to remain class based.</p> <p>Has anybody had to do anything similar?</p> <p>Many thanks for any advice.</p> <p>=======================================================================</p> <p>UPDATE ( basic code included ):</p> <pre><code> In the HomeController: public class MyViewModel { public MyViewModel(List&lt;Thing&gt; things ) // Thing.cs contains properties name and rating { this.Things = things; } public List&lt;Thing&gt; Things { get; private set; } } public ActionResult Index() { List&lt;Thing&gt; things = new List&lt;Thing&gt;(); Thing t; t = new Thing(); t.name = "One"; t.rating = 1; things.Add(t); t = new Thing(); t.name = "Two"; t.rating = 2; things.Add(t); return View(new MyViewModel(things)); } [AcceptVerbs(HttpVerbs.Post)] public ActionResult Index( MyViewModel vm) { return View(); } and in the Index page ( Inherits="System.Web.Mvc.ViewPage&lt;MyProject.Controllers.MyViewModel&gt;" ) &lt;% using (Html.BeginForm()) {%&gt; &lt;ul&gt; &lt;% for( int t = 0; t&lt;Model.Things.Count; t++) {%&gt; &lt;li&gt; &lt;% for (int i = 1; i &lt; 6; i++) { MyProject.Thing thing = Model.Things[i]; %&gt; &lt;%=Html.RadioButton(String.Format("Things[{0}]", t), i)%&gt; &lt;% } %&gt; &lt;/li&gt; &lt;% }%&gt; &lt;/ul&gt; &lt;input type="submit" value="submit me" /&gt; &lt;% } %&gt; </code></pre>
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