how to generate check box using @HTML.CheckboxFor with bool?

Question

In a form, I want to add a CheckBox to bind model value back to action. My model column is of type bool?

I tried the following code but getting error "Cannot implecitly convert type bool? to bool"

@Html.CheckBoxFor(m=>m.AccomPublic)

Please help me with correct way of using @HTML.CheckBoxFor.

Doesn't that help? http://stackoverflow.com/questions/6849774/mvc3-creating-checkbox-for-nullable-boolean — The-First-Tiger, Oct 04 '14 at 00:58

score 1 · Accepted Answer · answered Oct 04 '14 at 00:58

1

Instead of CheckBoxFor use

@Html.EditorFor(m=>m.AccomPublic)

This will render a drop down with 3 values (True, False and Not Set)

answered Oct 04 '14 at 00:58

Thanks @Stephen but cant do UI change. – user576510 Oct 04 '14 at 01:49
1

You cant use a checkbox for a nullable `bool`. A checkbox has 2 states (true and false) where as a nullable `bool` has 3 states (true, false and null) so you need to change the property to bool, or change the UI to use a dropdown (or 3 radio buttons), or create you own control – Oct 04 '14 at 01:55
If I do something like "" will it work with model binding ? Actually I tried and it is not working. Clicking or unclicking check-box do not change value in model. Is it expected behavior ? – user576510 Oct 04 '14 at 02:06
1

No it wont work, because unchecked checkboxes do not post back so the only possible values you can recieve is `true` (checked) or `null` (not checked so nothing posts back). You can never check for `false` – Oct 04 '14 at 02:11

score 0 · Answer 2 · answered Jan 06 '15 at 13:48

0

This error is because of your property is of type nullable i.e. bool? Set your property as public bool nameofproperty{get;set;} And use @Html.checkboxFor(m=>m.nameofproperty)

answered Jan 06 '15 at 13:48

Mahesh

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how to generate check box using @HTML.CheckboxFor with bool?

2 Answers2