MVC3 - Coding a custom HTML Helper which output works with unobtrusive Javascript

I am attempting to add unobtrusive JavaScript to a file upload input control, using a custom HTML Helper extension. However, I have checked various blogs which use different methods to create the control, such as tab-builder but I couldn't find out ho开发者_运维技巧w the unobtrusive data tags are added.

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Unobtrusive data tags mainly means using the HTML 5 extensible "data-" attribute.

Check this blog post of Brad Wilson about unobtrusive javascript in MVC 3, he describes the various attributes used by the unobtrusive framework.

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If you are using TagBuilder, you can do this:

var validationAttributes = html.GetUnobtrusiveValidationAttributes(name, metadata);

then use MergeAttributes on your tagbuilder to add the unobtrusive validation attributes to your tag.