Custom Validator not firing JavaScript Function (Client-Side) in ASP. Net

Question

<asp:CustomValidator ID="CustomValidator1" runat="server" 
    ErrorMessage="Date must be set" ClientValidationFunction="ValidateDate" 
    ControlToValidate="DropDownList1" Display="Dynamic" class="errorMessage">
</asp:CustomValidator>

This is the custom validator, the client-side function is called ValidateDate.

function ValidateDate(sender, args) {
    args.isValid = false;
}

I wrote this function both in a separate .js file, and in the .aspx file, yet it's not working.

Of course the validation will be bigger, I'm just making a test.

Mind the case sensitivity. Client-side validator should be set like: args.IsValid = false; — Kraken101
– Kraken101, Commented Mar 17, 2015 at 16:26

Zo Has · Accepted Answer · 2012-12-16 15:43:52Z

7

You have to set ValidateEmptyText="True|False"property on your validator to validate empty text. MSDN

answered Dec 16, 2012 at 15:43

Zo Has

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