Base class for custom model binder that binds a single text field to a single value

SimpleModelBinderBase.cs

public abstract class SimpleModelBinderBase : IModelBinder
{
	public object BindModel (ControllerContext controllerContext, ModelBindingContext bindingContext)
	{
		var key = bindingContext.ModelName;
		var result = bindingContext.ValueProvider.GetValue (key);

		if (result == null) {
			return null;
		}

		bindingContext.ModelState.SetModelValue (key, result);

		var value = result.AttemptedValue;
		if (string.IsNullOrWhiteSpace (value)) {
			return null;
		}

		try {
			return Parse (value);
		} catch (Exception ex) {
			bindingContext.ModelState.AddModelError (key, ex);
			return null;
		}
	}

	protected abstract object Parse (string value);
}