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Custom validator para validar un checkbox

/ Published in: VB.NET
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Copy this code and paste it in your HTML 
  1. <script type="text/javascript">
  2.         function ValidateCheckBox(sender, args) {
  3.             if (document.getElementById("<%=chkAcepto.ClientID %>").checked == true) {
  4.                 args.IsValid = true;
  5.             } else {
  6.                 args.IsValid = false;
  7.             }
  8.         }
  9.     </script>
  10.  
  11.     <asp:CheckBox ID="chkAcepto" runat="server" Checked="false" />
  12.     <asp:CustomValidator ID="reqCheckBox" runat="server" ErrorMessage="Obligatorio" 
  13.                     ClientValidationFunction = "ValidateCheckBox" />

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