ASP.NET 4 Unleashed

Supporting Two-Way Databinding

Two-way databinding is a feature introduced with ASP.NET 2.0 Framework. Two-way databinding enables you to extract values from a template. You can use a two-way databinding expression not only to display the value of a data item, but also to update the value of a data item.

You create a template that supports two-way databinding expressions by creating a property that returns an object that implements the IBindableTemplate interface. This interface inherits from the ITemplate interface. It has the following two methods:

• InstantiateIn— Instantiates the contents of a template in a particular control.

• ExtractValues— Returns a collection of databinding expression values from a template.

For example, the ProductForm ...