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copied!<p>Well, I guess one way of doing it is to sub-class the <code>ModelBindersDictionary</code> class and override the GetBinders(Type modelType, bool fallbackToDefault) method.</p> <pre><code>public class CustomModelBinderDictionary : ModelBinderDictionary { public override IModelBinder GetBinder(Type modelType, bool fallbackToDefault) { IModelBinder binder = base.GetBinder(modelType, false); if (binder == null) { Type baseType = modelType.BaseType; while (binder == null && baseType != typeof(object)) { binder = base.GetBinder(baseType, false); baseType = baseType.BaseType; } } return binder ?? DefaultBinder; } } </code></pre> <p>Basically walk the class hierarchy until a model binder is found or default to the <code>DefaultModelBinder</code>.</p> <p>The next step is making the framework accept the <code>CustomModelBinderDictionary</code>. As far as I can tell you need to sub-class the following three classes and override the Binders property: <code>DefaultModelBinder</code>, <code>ControllerActionInvoker</code> and <code>Controller</code>. You might want to provide your own static <code>CustomModelBinders</code> class.</p> <p><em>Disclaimer</em>: This is just a rough prototype. I'm not sure if it's actually working, what implications it might have or if it is a sound approach. You might want to download the <a href="http://www.codeplex.com/aspnet" rel="nofollow noreferrer">code</a> for the framework yourself and experiment.</p> <p><strong>Update</strong>:</p> <p>I guess an alternative solution would be to define your own <code>CustomModelBindingAttribute</code>.</p> <pre><code>public class BindToBase : CustomModelBinderAttribute { public override IModelBinder GetBinder() { return new BaseModelBinder(); } } public class CustomController { public ActionResult([BindToBase] Child child) { // Logic. } } </code></pre>

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