嵌套循环-@RadioButtonFor无法按预期工作

Question

for (var h= 0; h< Model.Homes.Count(); h++)
    for (var p = 0; p< Model.Homes[h].Phones.Count(); p++)

        //this works 
        @Html.RadioButton("Phone"+h.ToString(), h, Model.Homes[index].Phones[p].Phone.IsPrimary.Value)

        //Can't figure this one out
        @Html.RadioButtonFor(m=> m.Homes[index].Phones[p].Phone.IsPrimary, p)

    }
}

Realizations:

I've noticed after this answer that my code is creating a single radiobutton for each phone, but isn't tying them together based on homes.

What am i missing?

They either both check, or un-check but their not (bound?) also, i can check both of them or un-check both of them ) correctly by the name of the control??

Answer 1

I am not sure it will be possible using RadioButtonFor here. RadioButtonFor will construct the Name of the radiobutton based on the lambda expression you provide. If your model were to have a property PrimaryPhone then you could use RadioButtonFor(m=> m.Homes[h].PrimaryPhone) but the way it is here, the lambda expression will cause it to construct a name specific to each phone.

See: How can I override the name attribute of a RadioButtonFor?

You can either use the first syntax you suggested to manually construct a radio grouping, or you could consider adding a property to your model to store the primary phone.