Filter a gridview ignoring accents

I am trying to filter开发者_如何学编程 a gridview with a filter expression like this

"SurName like '%surname%' AND FirstName like '%firstname%'"

So far it works fine except in one edge case: Some name's have an accent in them. We want to display these names with an accent but when searching I would like to use an accent insentive search. How do I do this? I tried useing the SQL COLLATE command and that worked when I did a test query on the database but not in the filter expression for a gridview.

Please could I have some advice?

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Before binding the datasource to the gridview add an extra column with de-accented version of the column you want to filter. Then run the filter on the modified column but display the original.