custom validator for checkbox in asp.net

Question

i have used custom validator

 protected void cvIsActive_ServerValidate(object source,ServerValidateEventArgs args)
        {
            if(args.Value.Length==1)
                args.IsValid = true;
            else
                args.IsValid = false;
        }       

this is code for server validate.. i have written to check whether its checked or not. i have taken control to validate as checkbox

<asp:CustomValidator runat="server" ErrorMessage="Please Select Status" 
            ID="cvIsActive" Font-Size="Smaller" 
            onservervalidate="cvIsActive_ServerValidate" ControlToValidate="chkIsActive"></asp:CustomValidator>

but as soon as page loads it giving error

Control 'chkIsActive' referenced by the ControlToValidate property of 'cvIsActive' cannot be validated. 

Answer 1

You don't need to set ControlToValidate property for CustomValidator when using it with CheckBox and simply use this in Server Validate like:

 args.IsValid = chkIsActive.Checked;