>I have a dataset that is used to show some data on the page. However, when the export option is done, I need to take that dataset and change the order of certain fields. Then, I can do the export. This export has been used so far and its layout cannot be modified as several developers have tools that are bound on that. How can I change the order of certain fields?

If your using ADO.NET 2.0 then you can change the position of a column using the DataColumn.SetOrdinal method.

If your using ADO.NET 1.1 then you will have to code a method to process through the data and build a copy with the columns in the desired order.