Page_ClientValidate is undefined in formview

Question

I have validators inside a <asp:formview>, in order to show custom validation I am using

if (!Page_ClientValidate("groupName")) {}

I am getting an error Object Expected. How can I validate client side from the form view?

I use Page_ClientValidate for <asp:listview> and there

Answer 1

The Page_ClientValidate function may sometimes be undefined, e.g. if there are no validators on the page. Check if typeof Page_ClientValidate === "function" before calling it.

Answer 2

This would also occur if all validator's EnableClientScript properties are set to false.