How can I get the value(s) of the selected item(s) of CheckBoxList using Jquery ?

Question

If I have the following CheckBoxList

<asp:CheckBoxList ID="typeCheckBoxList" runat="server" RepeatDirection="Horizontal">
  <asp:ListItem Value="0">Student</asp:ListItem>
  <asp:ListItem Value="1">Parent</asp:ListItem>
  <asp:ListItem Value="2">Educational</asp:ListItem>
  <asp:ListItem Value="3">Specialist </asp:ListItem>
  <asp:ListItem Value="5">Other</asp:ListItem>
</asp:CheckBoxList>

Using Jquery i want to get the values of the selected items, I use the following code

$('#<%= typeCheckBoxList.ClientID %> input:checked').each(function() {
   alert($(this).val());
   alert($(this).next('label').text());
});

$(this).val() always returns "on" and I can't return values such as 0 ,1, etc.
Is there any way to do that ?

EDIT : Rendered Markup:

<table id="RegisterationWUC1_typeCheckBoxList" class="listVertical" border="0"> 
  <tr> 
    <td>
      <input id="RegisterationWUC1_typeCheckBoxList_0" type="checkbox" name="RegisterationWUC1$typeCheckBoxList$0" />
      <label for="RegisterationWUC1_typeCheckBoxList_0">Student</label>
    </td>
    <td>
      <input id="RegisterationWUC1_typeCheckBoxList_1" type="checkbox" name="RegisterationWUC1$typeCheckBoxList$1" />
      <label for="RegisterationWUC1_typeCheckBoxList_1">Parent</label>
    </td>
    <td>
      <input id="RegisterationWUC1_typeCheckBoxList_2" type="checkbox" name="RegisterationWUC1$typeCheckBoxList$2" />
      <label for="RegisterationWUC1_typeCheckBoxList_2">Educational</label>
    </td>
    <td>
      <input id="RegisterationWUC1_typeCheckBoxList_3" type="checkbox" name="RegisterationWUC1$typeCheckBoxList$3" />
      <label for="RegisterationWUC1_typeCheckBoxList_3">Specialist </label>
    </td>
    <td>
      <input id="RegisterationWUC1_typeCheckBoxList_4" type="checkbox" name="RegisterationWUC1$typeCheckBoxList$4" />
      <label for="RegisterationWUC1_typeCheckBoxList_4">other</label>
    </td>
  </tr> 
</table> 

Answer 1

Since ASP.Net 2.0 doesn't render this appropriately (it's intended purpose is to get the values server-side) you can do a bit of hackery. In the code-behind, do something like this:

foreach (ListItem li in typeCheckBoxList.Items)
  li.Attributes.Add("data-value", li.Value);

Then your markup will look like this (ignore the shorter names, my test wasn't in another named container, and it doesn't matter one bit for the question at hand):

<table id="typeCheckBoxList"> 
  <tr> 
    <td>
      <span data-value="0">
        <input id="typeCheckBoxList_0" type="checkbox" name="H$M$typeCheckBoxList$0" />
        <label for="typeCheckBoxList_0">Student</label>
      </span>
    </td>
    <td>
      <span data-value="1">
        <input id="typeCheckBoxList_1" type="checkbox" name="H$M$typeCheckBoxList$1" />
        <label for="typeCheckBoxList_1">Parent</label>
      </span>
    </td>
    <td>
      <span data-value="2">
        <input id="typeCheckBoxList_2" type="checkbox" name="H$M$typeCheckBoxList$2" />
        <label for="typeCheckBoxList_2">Educational</label>
      </span>
    </td>
    <td>
      <span data-value="3">
        <input id="typeCheckBoxList_3" type="checkbox" name="H$M$typeCheckBoxList$3" />
        <label for="typeCheckBoxList_3">Specialist </label>
      </span>
    </td>
    <td>
      <span data-value="5">
        <input id="typeCheckBoxList_4" type="checkbox" name="H$M$typeCheckBoxList$4" />
        <label for="typeCheckBoxList_4">Other</label>
      </span>
    </td> 
  </tr> 
</table>

Notice that extra <span data-value="valueHere"></span> wrapped around it now? You can just use .closest() or .parent() to get to the <span> and retrieve that value via .attr(), like this:

$('#typeCheckBoxList input:checked').each(function() {
  alert($(this).closest('span').attr('data-value'));
  alert($(this).next('label').text());
});

Give it a try in a demo here :) If it helps at all. the default rendering mode for ASP.Net 4.0 does render the value in markup, as it should. The reason for the data-thing format on the attribute is to be as valid as possible, these are called data attributes, added to the spec in HTML5, but cause no issues for this in 4.