ASP.NET 4 Unleashed

Creating a Lookup ExpressionBuilder

In this section, you learn how to extend ASP.NET Framework by building a custom ExpressionBuilder class. We create a Lookup ExpressionBuilder that looks up string values from an XML file.

The LookupExpressionBuilder class is contained in Listing 31.10.

Listing 31.10. App_Code\LookupExpressionBuilder.cs

Before you can use the LookupExpressionBuilder class, you need to register it in the web configuration file. ...