Microsoft Excel mangles Diacritics in .csv files?

Question

I am programmatically exporting data (using PHP 5.2) into a .csv test file.
Example data: Numéro 1 (note the accented e). The data is utf-8 (

Answer 1

If you have legacy code in vb.net like I have, the following code worked for me:

    Response.Clear()
    Response.ClearHeaders()
    Response.ContentType = "text/csv"
    Response.Expires = 0
    Response.AddHeader("Content-Disposition", "attachment; filename=export.csv;")
    Using sw As StreamWriter = New StreamWriter(Context.Response.OutputStream, System.Text.Encoding.Unicode)
        sw.Write(csv)
        sw.Close()
    End Using
    Response.End()