Custom validator for a pair of controls

[Erik Cruz]

Hi.

I have a page that uses 4 textboxes where my user can input dates. Before
submit data, I need to test to see if the user filled at least two of these
textboxes. I can easily test this using simple javascript, but I am trying
to do this using a custom validator control. But as far as I know, the
validator tests just one control, not a pair of controls, as I need. Is it
possible to create a custom control for this situation?

TIA,
Erik Cruz

 

[Teemu Keiski]

Hi,

you can check multiple controls with CustomValidator. If you leave
ControlToValidate property to blank, CustomValidator runs the server-side
and client-side validation once per roundtrip (client-side before submitting
and server-side while postbacking as usual). It means the CustomValidator
isn't tied to the control and you can validate anything you want with it
(also blank controls or conditional validation). Certainly you need to refer
to the controls you validate in validion functions but that shouldn't be
hard.

 

[fritz]

Hi,

you can check multiple controls with CustomValidator. If you leave
ControlToValidate property to blank, CustomValidator runs the server-side
and client-side validation once per roundtrip (client-side before
submitting and server-side while postbacking as usual). It means the
CustomValidator isn't tied to the control and you can validate anything
you want with it (also blank controls or conditional validation).
Certainly you need to refer to the controls you validate in validion
functions but that shouldn't be hard.

I am confused, is there not a problem with the label?. I thought the custom
validator used a label with a specific id.

 

[Teemu Keiski]

Are you somehow confusing validators that are done by using built-in
CustomValidator and then custom validator controls which are developed by
inheriting from BaseValidator? The built-in CustomValidator can work the way
I described (without ControlToValidate property)

Here is about the CustomValidator I was talking about:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/aspplusvalid.asp


--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke

 

[Erik Cruz]

Thanks Teemu, it worked

Maybe you can help me with another issue. My users type dates using the
format DD/MM/YYYY. How can I validate these dates in server-side code,
regardless of the format they are using?

Thanks again for your time.

Erik Cruz