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Posted 16 Jan 2012

Announcing MVC3 Validation Groups

, 16 Jan 2012
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The new MVC3 Validation Groups

I’ve recently had to organise the validation for long/multipart forms. Ordinarily, you’d divide the form up into smaller models and create a wizard style user journey. But in this case, the UI design called for the user to arbitrarily jump back and forth between pages in the wizard and other restrictions which meant that we couldn’t persist each sub-page on change. What we needed were validation groups!

As this work involved a bit of the old copy-paste-adapt from the standard MVC code, it’s a bit complicated to go into the fine details of how to replicate the functionality for yourself. So I’ve setup a CodePlex project with a reusable library all ready to go! (Of course, all the source code is up there as well!)

How to Use

  1. Download the latest release from codeplex. (Get the latest Example Site as well to see a preconfigured MVC3 Website and example integration)
  2. Add a reference to ‘McjDevelopment.Mvc3ValidationGroups.dll’ to your MVC3 project:


  3. Copy ‘jquery.validate.unobtrusive.validationgroups.js’ to your ‘scripts’ folder:


  4. Decorate your view models with the [ValidatorGroup] attribute specifying the validation groups that that field belongs to (space delimited):


  5. Update your view to use ‘jquery.validate.unobtrusive.validationgroups.js’ instead of ‘jquery.validate.unobtrusive.js’ (or ‘jquery.validate.unobtrusive.min.js’):


  6. Update your view to include where you want each group's Validation Summary to appear.


  7. Amend your ‘Action’ buttons and links to include ‘data-val-valgroup-name’ attribute and specify which validation groups should be triggered by the user clicking on that element:


  8. Amend your controller to check the appropriate validation groups when called (this implementation shows a common action being called with uses the clicked button name to select the validation group, an alternative is to use JS to dynamically alter the form’s action location).


  9. Test validation groups!



This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Martin Jarvis
Software Developer (Senior) Freestyle Interactive Ltd
United Kingdom United Kingdom
I'm a lead developer for Freestyle Interactive Ltd where we create many wonderful websites built on Microsofts ASP.Net and Ektron CMS.

I've been developing .Net applications (both Windows and Web) since 2002.

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Comments and Discussions

NewsFixed having to modify the standard js files in version Pin
Martin Jarvis17-Jan-12 9:53
memberMartin Jarvis17-Jan-12 9:53 

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