ASP.NET 4.5 has introduced some cool new features and enhancements for web developers using Visual Studio 2012. One of the new features introduced deals with the framework’s Web Forms technology. In previous versions of ASP.NET, if you wanted to display data-bound values in a control, you needed to use a data-binding expression with an Eval statement, e.g. <%# Eval(“Data”) %>.

Using an Eval Statement to display data-bound items

This approach works, but it introduces a few problems. In my experience, the Eval statement approach is prone to developer error. If you are like me, then you have undoubtedly misspelled a member name or tried to bind to a  nonexistent member. These mistakes, while trivial, tend to make themselves known only at run-time thus making them more difficult to track. Due to the Eval statement being dynamic in nature, it is impossible to enforce compile time error checking.

With ASP.NET 4.5, we can now take advantage of Strongly Typed Data Controls. These controls allow us to specify the type of data the control is to be bound to, providing us with IntelliSense (which solves another problem for me: remembering which members belong to the DataSource) and compile time error checking. Adding a strongly typed data control requires minimal effort!

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