CheckBoxList several options: how to model the binding back and get all the options?

Question

This code:

Html.CheckBoxList(ViewData.TemplateInfo.HtmlFieldPrefix, myList)

Produces this allowance:

<ul><li><input name="Header.h_dist_cd" type="checkbox" value="BD" />
        <span>BD - Dist BD Name</span></li>
    <li><input name="Header.h_dist_cd" type="checkbox" value="SS" />
        <span>SS - Dist SS Name</span></li>
    <li><input name="Header.h_dist_cd" type="checkbox" value="DS" />
        <span>DS - Dist DS Name</span></li>
    <li><input name="Header.h_dist_cd" type="checkbox" value="SW" />
        <span>SW - Dist SW Name </span></li>
</ul>

You can check several options. The return string parameter Header.h_dist_cdcontains only the first value selected. What do I need to do to get other verified values?

The post method parameter is as follows:

public ActionResult Edit(Header header)

Answer 1

when you have multiple items with the same name, you will get their values ​​separated by coma

Answer 2

I assume that the Html.CheckBoxList is your extension and this markup you created.

, , :

• Header h_dist_cd . : Header - , .
• , , . , .

nit, 'label for = "..." ', , / .

, . , . EditorFor MVC2.

...

...

[AtLeastOneRequired(ErrorMessage = "(required)")]
public MultiSelectModel Cofamilies { get; set; }

SelectListItem...

MyViewModel(...)
{
  List<SelectListItem> initialSelections = ...from controller or domain layer...;
  Cofamilies = new MultiSelectModel(initialSelections);
  ...

MultiSelectModel. ...

public class MultiSelectModel : ICountable
{
  public MultiSelectModel(IEnumerable<SelectListItem> items)
  {
    Items = new List<SelectListItem>(items);
    _value = new List<string>(Items.Count);
  } 

  public int Count { get { return Items.Count(x => x.Selected); } } 
  public List<SelectListItem> Items { get; private set; }

  private void _Select()
  {
    for (int i = 0; i < Items.Count; i++)
      Items[i].Selected = Value[i] != "false";
  }

  public List<SelectListItem> SelectedItems
  {
    get { return Items.Where(x => x.Selected).ToList(); }
  } 

  private void _SetSelectedValues(IEnumerable<string> values)
  {
    foreach (var item in Items)
    {
      var tmp = item;
      item.Selected = values.Any(x => x == tmp.Value);
    }
  } 

  public List<string> SelectedValues
  {
    get { return SelectedItems.Select(x => x.Value).ToList(); }
    set { _SetSelectedValues(value); }
  } 

  public List<string> Value
  {
    get { return _value; }
    set { _value = value; _Select(); }
  }
  private List<string> _value; 
}

Views/Shared/MultiSelectModel.ascx...

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<WebUI.Cofamilies.Models.Shared.MultiSelectModel>" %>

<div class="set">

<%=Html.LabelFor(model => model)%>

<ul>
  <% for (int i = 0; i < Model.Items.Count; i++)
  {
    var item = Model.Items[i];
    string name = ViewData.ModelMetadata.PropertyName + ".Value[" + i + "]";
    string id = ViewData.ModelMetadata.PropertyName + "_Value[" + i + "]";
    string selected = item.Selected ? "checked=\"checked\"" : "";
  %>
  <li>
    <input type="checkbox" name="<%= name %>" id="<%= id %>" <%= selected %> value="true" />
    <label for="<%= id %>"><%= item.Text %></label>
    <input type="hidden" name="<%= name %>" value="false" />
  </li>
  <% } %>
</ul>
<%= Html.ValidationMessageFor(model => model) %>

:

• . (, AtLeastOneRequired - )

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Answer 3

, , CheckBoxList, , :

1- Jquery.json.js :

2- ".cssMyClass" checkboxlist, css:

 <script type="text/javascript" >
       $(document).ready(function () {
           $("#btnSubmit").click(sendValues);
         });

     function populateValues()
     {
         var data = new Array();
         $('.myCssClas').each(function () {
             if ($(this).attr('checked')) {
                 var x = $(this).attr("value");
                 data.push(x);
             }
         }); 

         return data;
     }

     function sendValues() {
         var data = populateValues();
               $.ajax({
                   type: 'POST',
                   url: '@Url.Content("~/Home/Save")',
                   data: $.json.encode(data),
                   dataType: 'json',
                   contentType: 'application/json; charset=utf-8',
                   success: function () { alert("1"); }
               });

       } 



 </script>

3 , "" "Home" ajax 4- , , :

 [HttpPost]
        public ActionResult Save(int[] val)
        {

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