Why does ASP.NET MVC Html.CheckBox output two INPUTs with the same name?

Question

Why in the world does the line:

<%= Html.CheckBox(\"ForSale\", Model.Product.ForSale)%> For Sale

result in the following HTML:

<

Answer 1

Now whenever I check the box and access Request.Form["ForSale"], I get the ridiculous answer of "true,false". Am I supposed to parse that?

Try this:

var ForSale = Convert.ToBoolean(Request.Form.GetValues("ForSale").First());

UPDATED:

What if in the next MVC build it will return the value in the revers order "false, true"? ... – Mastermind

var ForSale = Request.Form.GetValues("ForSale")
    .Select(x => x.ToUpperInvariant()).Contains("TRUE");

// or

// FormatException can be thrown from Convert.ToBoolean()
var ForSale = Request.Form.GetValues("ForSale")
    .Select(x => Convert.ToBoolean(x)).Contains(true);