Question

I am using a model in MVC3 to populate textboxes on my page like so :

<input name="test" value="a" type="radio" id="emp_contributions_gbp" @if (Model.myvalue.ToString() == "x"){<text>checked=true</text>}>

This works perfectly fine for saying – “if model.myvalue = x, then check this box”

However, I want to be able to return this model to the controller so I can persist the data should it be updated.

I am now using:
@Html.TextBoxFor(m => m.someField) which works perfectly with the model, however I have no idea how I could use .CheckboxFor and my IF statements together

Answer 1

You can use the CheckBoxFor method like so:

@Html.CheckBoxFor(m => m.SomeProperty, new { checked = Model.myvalue.ToString() == "x" })

See here for the MSDN documentation of this overload.

Update

Consider using the RadioButtonFor method instead:

Model:

public class MyViewModel
{
  [Required]
  public string SomeProperty { get; set; }
}

View:

@using (Html.BeginForm())
{
  <div>A: @Html.RadioButtonFor(x => x.SomeProperty, "a")</div>
  <div>B: @Html.RadioButtonFor(x => x.SomeProperty, "b")</div>
  <div>C: @Html.RadioButtonFor(x => x.SomeProperty, "c")</div>
  <input type="submit" />
}

You can then preselect some radio by setting the view model property to the corresponding value:

public ActionResult Index()
{
  var model = new MyViewModel
  {
    SomeProperty = "a" // select the first radio
  };
  return View(model);
}