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.

A more robust answer can be found here stackoverflow.com/q/1228112/1066291. They are using it to make the checkbox required but you could write any custom validation logic. — Mark Rucker
– Mark Rucker, Commented Jan 26, 2012 at 19:11

gbs · Accepted Answer · 2011-03-28 17:53:16Z

10

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;

answered Mar 28, 2011 at 17:53

gbs

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