CODEWITHSUNDEEP
asp.net-mvcradio-button
Pure.Krome
Pure.Krome

Reputation: 87087

How to create a few radio boxes in ASP.NET MVC?

yeah :( simple question * blush *

Lets imagine i have the following enumeration:-

string[] languages = new string[]
                     {
                         "en (uk)", // English (colour)
                         "en (us)", // English (color)
                         "fr", // French
                         "es" // Spanish
                     };

ViewData["Languages"] = languages;
ViewData["UserLanguage"] = "en (uk)";

Armed with this, how would i display a radio button in the View? Is the only way to do this to enumerate through all the language values and render a RadioBox?

eg. pseduo-code...

<% foreach(string language in ViewData["Languages"] as string[])
{
  response.write Html.RadioBox(... not sure what to set in here ...)
}%>

cheers!

Upvotes: 2

Views: 1682

Answers (1)

sirrocco
sirrocco

Reputation: 8055

Quick and dirty:

<% foreach(string language in ViewData["Languages"] as string[]) { %>
  <%= Html.RadioBox(language,language,language == ViewData["UserLanguage"].ToString()) %>
<% } %>

The problem is that you have allot of magic strings in that viewdata. What I would do is something like this:

  1. Create a class: UserForm

    class UserForm {

     IList<string> _languages;
     string _selectedL;

     public UserForm (IList<string> languages, string selectedLanguage)
     {
       _languages = languages;
       _selectedL = selectedLanguage;
     }

     IEnumerable<SelectedListItem> UserLanguages {
         get {
              return from l in _languages
                      select new SelectedListItem {
                          Text = l,
                          Value = l,
                          Selected = (l == _selectedL)
                      };
         }
     }
}

  2. the view should be strongly typed and be of type : UserForm then you could render it like : 

    <%= Html.RadioButtonList("userLanguages",ViewData.Model.UserLanguages) %>

  3. From the controller you would : 

    return View(new UserForm(listOfLanguages, selectedLanguage));

HTH.

EDIT: OK, found it - the RadioButtonList is an extension method in the Microsoft.Web.Mvc namespace (the MVCFutures project) - you can get it from here : MVCFutures

Upvotes: 2

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