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    <p>Based on the names <code>numerators</code> and <code>denominators</code> it looks like you have implemented the lists as fields on the model.</p> <p>You should <a href="https://stackoverflow.com/a/7789986/700926">use properties instead</a> for the model binding to work properly (which I assume that @Raphael has done).</p> <p>A working model would look like this:</p> <pre><code>public class BetChargeModel { public List&lt;double&gt; numerators { get; set; } public List&lt;double&gt; denominators { get; set; } } </code></pre> <p>... and to follow to naming conventions, make sure to rename <code>numerators</code> to <code>Numerators</code> and <code>denominators</code> to <code>Denominators</code>.</p> <p>However, if this does not resolve your model binding issue, please elaborate and post your model implementation :)</p> <p>-- UPDATE</p> <p>As you have reported that the issue still persists I will post the code I have implemented based on your own provided samples - then you can cross check to make sure everything looks right on your machine - the code shown in the following is tested and works:</p> <p><strong><em>Model:</em></strong></p> <pre><code>public class BetChargeModel { public List&lt;double&gt; numerators { get; set; } public List&lt;double&gt; denominators { get; set; } } </code></pre> <p><strong><em>View:</em></strong></p> <pre><code>@model Project.Models.BetChargeModel @using (Html.BeginForm()) { &lt;div&gt; @Html.TextBoxFor(m=&gt;m.numerators[0]) / @Html.TextBoxFor(m=&gt;m.denominators[0]) &lt;/div&gt; &lt;div&gt; @Html.TextBoxFor(m =&gt; m.numerators[1]) / @Html.TextBoxFor(m =&gt; m.denominators[1]) &lt;/div&gt; &lt;div&gt; &lt;input type="submit" value="Calculate" /&gt; &lt;/div&gt; } </code></pre> <p><strong><em>Controller:</em></strong></p> <pre><code>public ActionResult Index() { var model = new BetChargeModel { numerators = new List&lt;double&gt; {0, 0}, denominators = new List&lt;double&gt; {1, 1} }; return View(model); } [HttpPost] public ActionResult Index(BetChargeModel model) { var odds1 = model.numerators[0] / model.denominators[0]; var odds = model.numerators[1] / model.denominators[1]; return null; } </code></pre>
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    1. USLasse Christiansen
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    1. COYou assume well, I missed that possibility !
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      1. USRaphaël Althaus
    2. CO@Lasse You're right. I did put fields instead of properties in my model. I have updated it now though and I'm still getting the original error so I've posted my model as you've requested
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    3. CO@Sperick I have added my sample code now - I have tested it in an ASP.NET MVC4 application, and the model binding is working as expected :)
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