Handling variable number of fields in ASP.NET WebForms Page

Question

I wanted to gather some methods on how to add a variable number of fields to my form (with Add New and Remove buttons). I know that ASP.NET MVC has easy methods, but I'm unable to find any easy methods for WebForms.

Here's what I've used so far:

• Adding a new UserControl to a PlaceHolder on PostBack (I've had to fiddle with ViewState to make this work correctly, huge pain)
• Adding a new row to a grid and having a template field in a grid (works decently but kind of awkward)
• Actually having several fields on the form by default and hiding/showing them dynamically (fairly easy but you have a set number of fields.)

Any other methods? Thanks!

Answer 1

You can add them with Javascript and on postback get their value with

Request.Params["ControlId_1"]

You just need a convention on the ControlId naming.