Steve Sanderson BeginCollectionItem does not work in all cases ... a potential solution?

Question

I work with the BeginCollectionItem utility from Steve Sanderson to display a list of objects that will be edited in MVC3, and it works fine, re-rendering the entire collection from the iterator. My problem arises when I try to just add one new element to the collection and return the html that this object represents. For some reason, my data annotations are not showing up in the html coming from the code.

Are there any corrections for this, or is there something else, without having to write a manual check, what can I do to solve this problem?

Thanks.

Answer 1

What to consider:

• Data annotations will not be displayed unless FormContext exists in any method that you use to create this optional object. If you are using a partial view, add the following to it:

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  if (this.ViewContext.FormContext == null) { this.ViewContext.FormContext = new FormContext(); } 

• If you dynamically add an element to the page via AJAX, after adding a new element, you should clear the validation data in the DOM and reanalyze all your validation elements, for example:

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  $("form").removeData("validator"); $("form").removeData("unobtrusiveValidation"); $.validator.unobtrusive.parse("form");