ASP.NET Custom Validators - Page.Validate("groupName") not firing?

I have a custom validator in which the script validating the control is client-side JavaScript.

In my VB code behind for the website I call Page.Validate("groupName") but my validation script is not fired at all. I placed a break point in my JavaScript, but it's not even touching my validation script. While when I use the same function on non-custom validators it works.

I am thinking that it is impossibly to call my client-side validation script in my VB behind code via Page.Validate("groupName"). Do I absolutely need a server-side validation function?

Here's a bit of code:

<asp:CustomValidator ID="ValidateTxt" runat="server" 
     ClientValidationFunction="validateTxt" 
     ControlToValidate="txtBox" 
     Display="Dynamic"
     ValidationGroup="group1">
</asp:CustomValidator>

 <script type="text/javascript" language="javascript" >
    function validateFinHeight(source, arguments)
    {
         if(arguments.Value % 2 == 0 ){
            arguments.IsValid = true;
         }             
    }
 </script>

VB Behind Code:

Protected Sub cbo(ByVal sender As Object, ByVal e As System.EventArgs) Handles cbo.SelectedIndexChanged
    Page.Validate("group1")
E开发者_如何学Pythonnd Sub

The Page.Validate("group1") is not calling my JavaScript function.

---

Page.Validate is used to validate at Server side. If you want to trigger the client side validation then call the function Page_ClientValidate("group1") from your JavaScript code.