When implemented by a class, retrieves a set of name/value pairs for values bound using two-way ASP.NET data-binding syntax within the templated content.
Assembly: System.Web (in System.Web.dll)
An method must conform to the following rules:
If more than one binding exists for a given field, the last binding encountered is used.
In order to reference a control's identifier in the method, the control must also have a user-defined ID property at parse time. If no ID exists, this results in a parse error.