mvc bind/post boolean to radiobutton

Question

I have a column in my Model with a NULLABLE boolean value. Now on my View (for editing), I would like to bind that to two radiobuttons: Yes & No. If the value is null, then

Answer 1

Once you have selected a radio button, there's really no way to unselect it (as a user). I'd suggest that if you really need a three-valued result, that you have three radio buttons -- Yes, No, Don't care.

<%= Html.LabelFor( m => m.Foo ) %>
<%= Html.RadioButtonFor( m => m.Foo, "true" ) %> Yes
<%= Html.RadioButtonFor( m => m.Foo, "false" ) %> No
<%= Html.RadioButtonFor( m => m.Foo, string.Empty ) %> Don't Care
<%= Html.ValidationMessageFor( m => m.Foo ) %>