MVC3 EditorTemplate for a nullable boolean using RadioButtons

Question

I have a property on one of my objects that is a nullable boolean, I want my logic to have true represent Yes, false to be No and null to be N/A. Now because I am going to h

Answer 1

How about some extension method fun to keep that "one line to rule them all". :-)

public static class DictionaryHelper
{
    // This returns the dictionary so that you can "fluently" add values
    public static IDictionary AddIf(this IDictionary dictionary, bool addIt, TKey key, TValue value)
    {
        if (addIt)
            dictionary.Add(key, value);
        return dictionary;
    }
}

And then in your template file you simply change the signature of how you are adding the additional parameters including the checked="checked" attribute to the element.

@model bool?

@Html.RadioButtonFor(x => x, true, new Dictionary()
    .AddIf(true, "id", ViewData.TemplateInfo.GetFullHtmlFieldId("") + "Yes")
    .AddIf(Model.HasValue && Model.Value, "checked", "checked")
) Yes

@Html.RadioButtonFor(x => x, false, new Dictionary()
    .AddIf(true, "id", ViewData.TemplateInfo.GetFullHtmlFieldId("") + "No")
    .AddIf(Model.HasValue && !Model.Value, "checked", "checked")
) No

@Html.RadioButtonFor(x => x, "null", new Dictionary()
    .AddIf(true, "id", ViewData.TemplateInfo.GetFullHtmlFieldId("") + "NA")
    .AddIf(!Model.HasValue, "checked", "checked")
) N/A