CODEWITHSUNDEEP
asp.net-mvc-4razorradio-buttonradio-group
Ali
Ali

Reputation: 1152

Multiple radio button groups in MVC 4 Razor

I need to have multiple radio button groups in my form like this:
enter image description here

I know it's simply done by specifying the same "name" html attribute for each group.
HOWEVER
MVC doesn't let you specify your own name attribute when using html helper like this:

@Html.RadioButtonFor(i => item.id, item.SelectedID, new { Name = item.OptServiceCatId })

Because it looks at each tag's "name" attribute (not "id") to map/bind the form to the model which the controller receives, etc.

Some said that specifying each with the same "GroupName" attribute will solve the problem, but it didn't work either.

So, is there any way which works ?

EDIT:
Here's my view (simplified):

@model Service_Provider.ViewModels.SelectOptServicesForSubServiceViewModel

@foreach (var cat in Model.OptServices)
{
  //A piece of code & html here
  @foreach (var item in cat.OptItems.Where(i => i.MultiSelect == false))
  {
     @Html.RadioButtonFor(i => item.id, item.SelectedID, new { GroupName = item.OptServiceCatId })
<br />
  }    
}

NOTE:
My model is a List<OptServices>:

public List<OptServices> Cats {get; set;}

And OptServices has a List of OptItems inside:

public class OptServices
{
//a few things
public List<OptItems> Items {get; set;}
}

Upvotes: 37

Views: 151197

Answers (5)

Anna
Anna

Reputation: 21

I was able to use the name attribute that you described in your example for the loop I am working on and it worked, perhaps because I created unique ids? I'm still considering whether I should switch to an editor template instead as mentioned in the links in another answer.

    @Html.RadioButtonFor(modelItem => item.Answers.AnswerYesNo, "true", new {Name = item.Description.QuestionId, id = string.Format("CBY{0}", item.Description.QuestionId), onclick = "setDescriptionVisibility(this)" }) Yes

    @Html.RadioButtonFor(modelItem => item.Answers.AnswerYesNo, "false", new { Name = item.Description.QuestionId, id = string.Format("CBN{0}", item.Description.QuestionId), onclick = "setDescriptionVisibility(this)" } ) No

Upvotes: 2

Ali
Ali

Reputation: 1152

Ok here's how I fixed this

My model is a list of categories. Each category contains a list of its subcategories.
with this in mind, every time in the foreach loop, each RadioButton will have its category's ID (which is unique) as its name attribue.
And I also used Html.RadioButton instead of Html.RadioButtonFor.

Here's the final 'working' pseudo-code:

@foreach (var cat in Model.Categories)
{
  //A piece of code & html here
  @foreach (var item in cat.SubCategories)
  {
     @Html.RadioButton(item.CategoryID.ToString(), item.ID)
  }    
}

The result is:

<input name="127" type="radio" value="110">

Please note that I HAVE NOT put all these radio button groups inside a form. And I don't know if this solution will still work properly in a form.

Thanks to all of the people who helped me solve this ;)

Upvotes: 19

Marcelo Sader
Marcelo Sader

Reputation: 351

I fixed a similar issue building a RadioButtonFor with pairs of text/value from a SelectList. I used a ViewBag to send the SelectList to the View, but you can use data from model too. My web application is a Blog and I have to build a RadioButton with some types of articles when he is writing a new post.

The code below was simplyfied.

List<SelectListItem> items = new List<SelectListItem>();

Dictionary<string, string> dictionary = new Dictionary<string, string>();

dictionary.Add("Texto", "1");
dictionary.Add("Foto", "2");
dictionary.Add("Vídeo", "3");

foreach (KeyValuePair<string, string> pair in objBLL.GetTiposPost())
{
    items.Add(new SelectListItem() { Text = pair.Key, Value = pair.Value, Selected = false });
}

ViewBag.TiposPost = new SelectList(items, "Value", "Text");

In the View, I used a foreach to build a radiobutton. 

<div class="form-group">
    <div class="col-sm-10">
        @foreach (var item in (SelectList)ViewBag.TiposPost)
        {
            @Html.RadioButtonFor(model => model.IDTipoPost, item.Value, false)
            <label class="control-label">@item.Text</label>
        }

    </div>
</div>

Notice that I used RadioButtonFor in order to catch the option value selected by user, in the Controler, after submit the form. I also had to put the item.Text outside the RadioButtonFor in order to show the text options.

Hope it's useful!

Upvotes: 4

Dakota
Dakota

Reputation: 525

You can use Dictonary to map Assume Milk,Butter,Chesse are group A (ListA) Water,Beer,Wine are group B 

Dictonary<string,List<string>>) dataMap;
dataMap.add("A",ListA);
dataMap.add("B",ListB);

At View , you can foreach Keys in dataMap and process your action

Upvotes: 1

Matt Bodily
Matt Bodily

Reputation: 6423

all you need is to tie the group to a different item in your model

@Html.RadioButtonFor(x => x.Field1, "Milk")
@Html.RadioButtonFor(x => x.Field1, "Butter")

@Html.RadioButtonFor(x => x.Field2, "Water")
@Html.RadioButtonFor(x => x.Field2, "Beer")

Upvotes: 31

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