How to get column name from gridview?

Question

I would like to know how can I get a column name from a gridview? by its number not by name. like : Name|Age|Birthday: ( so name=0 , age=1 etc...)

thanks.

Answer 1

This is not the answer to the question. It is only the answer if you never change the header text in the gridview. The asker of the question wanted to get the database field name by index.

I've seen a number of "answers" which only provide the text in the selected row of a gridview, or the header text which both do not answer the question that was asked...

You may ask why? If you were going to do audits of updates in a system and wanted to compare old values and new values and only update if they change and want to indicate which field was updated how do you show the database table field name at the index of the loop.

For instance:

Protected Sub gv_RowUpdating(sender As Object, e As System.Web.UI.WebControls.GridViewUpdateEventArgs)
    Dim intValCount As Integer = Integer.Parse(e.NewValues.Count)
    If intValCount > 0 Then
        Dim i As Integer = 0
        For i = 0 To intValCount - 1
            If Not e.OldValues(i).Equals(e.NewValues(i)) Then
                ' values have changed, audit the change
                Sys.Audits.General(intID, "the_database_table", , e.OldValues(i).ToString, e.NewValues(i).ToString)
            End If
            i += 1
        Next
    End If
End Sub

So the questions is how do you get the database table field name by index via code behind? I too have been searching for this and all the "answers" that I've seen are not the answers I think some of us are really looking for. All the mentioned methods I've seen here are not bullet proof references to a database tables field name.