ASP.net MVC conditional validation

Question

I'm working on an MVC page that requires conditional validation.

When a user selects a country from a dropdownlist, if they select one of two specific countries, then a box is displayed containing two text boxes which are required. I would like validation to activate in this case, and if they select any other country, then the box is hidden and validation will be deactivated.

Currently on the site, which I didn't build, there is a separate validation class (which inherits from ValidationSet) that handles all validation for that controller, and they validate with commands like ValidatePresence, ValidateDecimal, and ValidateExpression, so I would like to stick to that format for consistency. e.g.

new ValidatePresence("countryId") {ErrorMessageFormat = "Please supply a country for delivery to"}

Anyone got any ideas? Thanks

which version of mvc you are using? – Muhammad Adeel Zahid May 26 '11 at 14:39 — Muhammad Adeel Zahid, May 26 '11 at 14:39

score 3 · Answer 1 · answered May 26 '11 at 14:07

3

Is there anything wrong w/ just having another validator like, "ValidateConditionalPresence" or the like, then having it do what you said? i.e.

  return dropdown == false || (!string.IsNullOrWhitespace(box1) && !string.IsNullOrWhitespace(box2));

answered May 26 '11 at 14:07

Paul

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score 1 · Accepted Answer · answered Jun 17 '11 at 10:39

1

My apologies here - I initially though ValidatePresence, ValidateDecimal etc were validation controls within MVC, but discovered that they are custom classes. I have now amended these to do what was required.

Thanks for your time anyway

answered Jun 17 '11 at 10:39

e-on

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ASP.net MVC conditional validation

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