Toggling CommandField ShowEditButton conditionally occurs on next line

Question

I am trying to toggle whether or not a CommandField.ShowEditButton is true or false with the following code:

protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        clsEmployee employee = (clsEmployee)e.Row.DataItem;
        CommandField cmdField = (CommandField)((DataControlFieldCell)e.Row.Cells[0]).ContainingField;
        cmdField.ShowEditButton = _currentUser.FullName.Equals(employee.FullName);
    }
}

It works, but on the proceeding line; not the current one. If I am logged in as John Smith, this happens:

    +------+-------------------------------------+
    |      | John Smith                          |
    +------+-------------------------------------+
    | Edit | Jane Doe                            |
    +------+-------------------------------------+

I know I am on the right row, because this works (ShowEditButton is always true for the CommandField):

protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        clsEmployee employee = (clsEmployee)e.Row.DataItem;
        e.Row.Cells[0].Enabled = _currentUser.FullName.Equals(employee.FullName);
    }
}

When I am logged in as John Smith, I get:

    +------+-------------------------------------+
    | Edit | John Smith                          |
    +------+-------------------------------------+
    | Edit | Jane Doe                            |
    +------+-------------------------------------+

with the John Smith Edit being enabled and the Jane Doe one being disabled.

How can I get the first method to work?