Differences Between......

  • Thread starter Thread starter rn5a
  • Start date Start date
R

rn5a

Assuming that a DataGrid gets populated by a database column named
RegDate using a DataSet, what's the difference between

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

&

<%# Container.DataItem("RegDate") %>

If I am not wrong, the former can be used to format the output like
for e.g.

<%# DataBinder.Eval(Container.DataItem, "RegDate", "{0:d}") %>
 
Assuming that a DataGrid gets populated by a database column named
RegDate using a DataSet, what's the difference between

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

&

<%# Container.DataItem("RegDate") %>

If I am not wrong, the former can be used to format the output like
for e.g.

<%# DataBinder.Eval(Container.DataItem, "RegDate", "{0:d}") %>
Click to expand...

The Eval method uses reflection to read the "RegDate" item from the
Container.DataItem object, so the result is the same.

You can use formatting when reading the value directly also:

<%# String.Format("{0:d}", Container.DataItem("RegDate")) %>
 
And DataBinder.Eval is a performance hit. As Göran says, it uses reflection
to determine the type, and reflection is a more intensive activity. If you
can avoid using the Eval method, do it as it will help boost performance of
your web app slightly.
 
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