How can assign a data-group value to an html element created in C#?

Question

I have a scenario where I need to conditionally slide up (or hide) sets of controls/elements. I like the answer I found here from QBM5 about assigning data-groups to the control

Answer 1

First off, please notice that DataGroup or data-group is nothing predefined, it's an HTML5 data-* attribute which can be named anything you like.

Since you are working with ASP.NET and WebForms, you can use the Attributes collection on your TextBox element like this:

boxRequesterName.Attributes.Add("data-group", "1");

See on MSDN WebControl.Attributes and AttributeCollection.