Mike Bosch's Blog on .NET

Thanks for taking the time to tell us about it.

I think this will help:

function ValidateAnswerRadio()

{

   var list = document.getElementById('<%=RadioButtons.ClientID %>').childNodes;

   for(i = 0; i <  list.length; i++)

      if(list[i].type == "radio")

           if(list[i].checked) return true;

   return false;

}

<asp:RadioButtonList runat="server" ID="RadioButtons">

           <asp:ListItem Text="option1"></asp:ListItem>

           <asp:ListItem Text="option2"></asp:ListItem>

       </asp:RadioButtonList>

<asp:CustomValidator ID="CustomValidator1" ClientValidationFunction="ValidateRadio" runat="server">Required.</asp:CustomValidator>

Cheers

Going to have to go with a Custom Validator instead of the skm if you wish to use the ajax Callout Extender as it will not extend the skm validators.

-- Bob

Actually I was able to get the skm validator to work with callouts but for some reason it stops working when changing views in a MultiView control.  Trying to work it out.

Here is the fully functional Validator for CheckboxList control for download...

The components works perfect in  both IE and FireFox.

www.codeproject.com/.../Validator_CheckBoxList.aspx

THanks for the code, it works great the first time. However, is there a way to validate the checkboxlist only if another checkbox in the same page equals to certain value? In another word, can condition validation be done? Thanks.

In response to Pedro's comment, here's a quick and dirty workaround that worked for me. The checkbox list was being placed in a table, so his javascript won't work. Here's the updated version. Mind you, you must still include the ClientValidationFunction property of the custom validator to this javascript function.

function ValidateAnswerRadio(source, arguments) {

                       var list = document.getElementById('<%=CheckBoxList.ClientID %>').rows;

                       var counter = 0;

                       for (i = 0; i < list.length; i++) {

                           if (list[i].cells[0].childNodes[0].type == "checkbox") {

                               if (!list[i].cells[0].childNodes[0].checked) {

                                   counter++;

                               }

                           }

                       }

                       if (counter < list.length)

                           arguments.IsValid = true;

                       else

                           arguments.IsValid = false;

                   }

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Hey Still got probelms i got your controls working fine in the updatepanel but the valtiongroup does not apearing to be working right they fire the first time with the submit button but not the second no i dont have  it manually set to fales anywhere can you please update this contro l its great