Question

I need to display a few checkbox on a form and the user can check as many as hey want.

So I store the checkbox options on Database. (required)

Model

public class Options
{
    public int OptionsId {get; set;}
    public string Option {get; set;}
}

On the viewModel,

IEnumerable<Options> listCheckBoxOptions {get; set;}// store list of options from database
Dictionary<string,bool> checkboxs {get; set;} // store if is check or not

So on the view i want to store the check box value (true/false) in this checkboxs dictionary.

@foreach (var x in Model.listCheckBoxOptions)
     {                  
           @Html.CheckBoxFor(m => m.checkboxs[x.Option])
           @m.Option <br />                             
     } 

So when i submit the form… the checkboxs is null when gets to the controller.

Any idea why?

Answer 1

Your checkboxes will be given names like this checkboxs[key here] and ID’s like this checkboxs_key_here_. MVC doesn’t know how to bind these back.

Have a look at this thread that I answered just days ago: Generating an MVC3 RadioButton list in a loop statement

It’s the same thing, just using RadioButtons instead of CheckBoxes.