How to check if checkbox is checked on submit?

Question

I have model :

 [Required(ErrorMessage = "*")
 public bool RecordingPersonalData{ get; set; }

My view:

@Html.CheckBoxFor(m => m.Register.RecordingPersonalData, new { @style = "position:absolute;opacitiy:0;" })
    @Html.ValidationMessageFor(m=>m.Register.RecordingPersonalData)

The main idea is if chekcbox is unchecked on submit, display error message, but I don't get anything..any idea?

Required won't work here, because the bool will either be true or false. You will have to create your own Attribute: http://stackoverflow.com/questions/4730183/mvc-model-require-true — Dawood Awan, May 18 '15 at 09:31
A `boolean` property only has 2 values (`true` or `false`) and `@Html.CheckBoxFor()` generates a checkbox with `value="true"` and a hidden input with `value="false"` therefore `RecordingPersonalData` always has a value (your `[Required]` attribute is a bit pointless) — , May 18 '15 at 09:32
you need to implement custom validator for bool :http://blog.degree.no/2012/03/validation-of-required-checkbox-in-asp-net-mvc/ — Ehsan Sajjad, May 18 '15 at 09:32
also see this working example:http://www.jasonwatmore.com/post/2013/10/16/ASPNET-MVC-Required-Checkbox-with-Data-Annotations.aspx — Ehsan Sajjad, May 18 '15 at 09:33

score 0 · Answer 1 · answered May 18 '15 at 11:45

If a checkbox is required then it is a redundant control. You could either use a set of radio buttons (Yes/no/not known) linked to integer/enum values or remove the control altogether as I assume it is there to remind the user to enter other data.

You might be better served refining your model.

How to check if checkbox is checked on submit?

1 Answers1