Validate that at least one check box is checked between 4

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I have 4 check boxes on the web page, i want client side validation that ate least one check box should be check before submitting the form.

So, Far i have write the following code to validate a single check box.

C#

   <asp:CheckBox ID="CheckBoxTermsandCondition" runat="server" Font-Names="Calibri" Font-Size="Small" ForeColor="Black" />  I Agree with Terms and Condition
<asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="You Must Agree Upon our terms and condition" ClientValidationFunction = "ValidateCheckBox"></asp:CustomValidator><br /></div>

JavaScript

<script type = "text/javascript">
      function ValidateCheckBox(sender, args) {
          if (document.getElementById("<%=CheckBoxTermsandCondition.ClientID %>").checked == true) {
              args.IsValid = true;
          } else {
              args.IsValid = false;
          }
      }
  </script>

Posted 12-May-14 1:14am

Muhammad Taqi Hassan Bukhari

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Peter Leow · Answer 1 · 2014-05-12T01:21:00

Solution 1

Refer: javascript-validation-code-to-make-sure-that-at-least-one-checkbox-is-marked[^]

Posted 12-May-14 1:21am

Peter Leow

KaushalJB · Answer 2 · 2014-05-12T01:23:00

Solution 2

Try this jquery :

JavaScript

var checked = 0;

$("input[type=checkbox]").live("click", function() {
    if($(this).attr("checked")) checked++;
    else checked--;
}
//Then you would be able to test like this.

if(checked === 0) {
    doSomething();
}

Posted 12-May-14 1:23am

KaushalJB