在下一行有条件地切换CommandField ShowEditButton

Question

我试图使用以下代码切换CommandField.ShowEditButton是真还是假：

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);
    }
}

它有效，但在进行中;不是现在的。如果我以John Smith身份登录，则会发生这种情况：

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

我知道我在正确的行上，因为这有效（对于CommandField，ShowEditButton始终为true）：

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);
    }
}

当我以约翰史密斯身份登录时，我得到：

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

启用John Smith Edit并禁用Jane Doe。

如何让第一种方法起作用？