Introducing .NET 4.0: with Visual Studio 2010

11.9. Advanced Binding

By now you probably are excited about how easy the Microsoft AJAX libraries can make client-side data binding. The ASP.NET AJAX libraries also contain a number of other useful features that I will cover now:

• Conditional rendering

• Converters

• Two-way data binding

• Implementation of the Observer pattern

11.9.1. Conditional Rendering

Sometimes you will want to apply logic to the rendering of your content—perhaps in a medical application to highlight abnormal lab results. The ASP.NET AJAX libraries allow you to do this by embedding conditional logic within your markup.

Be careful when using this approach. You are polluting the ...