DataBinder.Eval Container.DataItem Performance Asp.Net

Using DataBinder.Eval Container.DataItem Method Slow Down The Performance Of Asp.Net Web Applications noticeably.

It is mentioned in MSDN site as -

"Because this method performs late-bound evaluation, using reflection at run time, it can cause performance to noticeably slow compared to standard ASP.NET data-binding syntax."

So one should avoid using this method as much as possible.


We use DataBinder.Eval method quite frequently in controls like GridView, Detailsview, DataList or Repeater to evaluate data binding expressions at run time because of simplicity like i used for Running Total in GridView.

decimal rowTotal = Convert.ToDecimal
              (DataBinder.Eval(e.Row.DataItem, "Amount"));

Or in General context

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

Now as Eval method is performance hungry we can avoid using it by writing code like mentioned below.

<%# ((DataRowView)Container.DataItem)["FirstName"] %>

Casting Container.DataItem as DataRowView explicitly performs better then Using Eval method.

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