Improve performance by using explicit cast instead of DataBinder.Eval

• Jul 13th, 2009
• 2 comments
• ASP.NET

The DataBinder.Eval method is often used when you want to bind data to a control's template. What DataBinder.Eval really does is to cast Container.DataItem to its specific type, like this:

<%# DataBinder.Eval(Container.DataItem, "Heading") %>

DataBinder.Eval uses .NET reflection in order to cast Container.DataItem to its specific type. The use of reflection in this method will give you a performance loss.

If performance is of importance in your application or if you know what type Container.DataItem is, it's better to use an explicit cast instead:

<%# ((DbDataRecord)Container.DataItem)["Heading"] %>

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