asp.net 中ListBox 显示 2 列

后台绑定：

DataTable dt = RateStorage.GetDataTable(2);
            foreach (System.Data.DataRow dr in dt.Rows)
            {
                ListItem li = new ListItem();
                li.Value = dr["ChargeAmount"].ToString();
                li.Text = (dr["Days"].ToString().TrimEnd()).PadRight(10, '\u00A0') + dr["ChargeAmount"].ToString();
                if (dr["Days"].ToString() == "1")
                {
                    li.Selected = true;
                }
                lbRate.Items.Add(li);
            } 

前台：

<asp:ListBox runat="server" ID="lbRate" Width="200px" Height="350px" SelectionMode="Single"></asp:ListBox>

在ie、firefox下测试通过