日历日渲染在服务器端不起作用

我创建了一个带有渲染选项的日历。它在我的本地计算机上完美运行，但在服务器上不起作用。我在压光机中向员工展示了时间表，它在本地机器中工作正常。但是现在我在服务器上发布，它在那里不起作用。

我的部分代码在这里：

if (e.Day.Date.Month == DateTime.Now.Month - 1)
{
    if ((lblfromdate.Text != "") && (lbltodate.Text != ""))
    {
        if (e.Day.Date < Convert.ToDateTime(lblfromdate.Text))
        {
            e.Cell.Text = string.Empty;
            e.Cell.BorderColor = System.Drawing.Color.White;
        }
        else
        {
            DataSet4TableAdapters.sp_getallholidayinfoTableAdapter TA = new DataSet4TableAdapters.sp_getallholidayinfoTableAdapter();
            DataSet4.sp_getallholidayinfoDataTable DS = TA.GetData();
            if (DS.Rows.Count > 0)
            {
                DataView DV = new DataView();
                DV = DS.DefaultView;
                string fromdate = Convert.ToString(lblfromdate.Text.Substring(5, 2) + "-" + lblfromdate.Text.Substring(8, 2) + "-" + lblfromdate.Text.Substring(0, 4));
                string todate = Convert.ToString(lbltodate.Text.Substring(5, 2) + "-" + lbltodate.Text.Substring(8, 2) + "-" + lbltodate.Text.Substring(0, 4));
                DV.RowFilter = "fldfromdate >=#" + fromdate + "# and fldfromdate <=#" + todate + "#";
                if (DV.Count > 0)
                {
                    string indate = Convert.ToString(DV[0]["fldfromdate"]);
                    string input = indate.Substring(6) + "-" + indate.Substring(0, 2) + "-" + indate.Substring(3, 2);
                    if (Convert.ToString(e.Day.Date.ToShortDateString()) == input)
                    {
                        e.Cell.Controls.Clear();
                        e.Cell.Text = "Holiday";
                        e.Cell.BackColor = System.Drawing.Color.BlueViolet;
                    }
                }
            }
        }
    }
}

我的设计代码：

<asp:Calendar ID="Calendar2" runat="server" BackColor="White"
    BorderColor="Black" BorderWidth="2px" Enabled="False"
    Font-Names="Verdana" Font-Size="9pt" ForeColor="Black"
    Height="183px" NextPrevFormat="FullMonth" ShowGridLines="True"
    Width="659px" OnDayRender="Calendar2_DayRender" ShowNextPrevMonth="False">
    <DayHeaderStyle BackColor="#6699FF" BorderStyle="Solid"
        Font-Bold="True" Font-Size="8pt" />
    <NextPrevStyle Font-Bold="True" Font-Size="8pt"
        ForeColor="#333333" VerticalAlign="Bottom" />
    <OtherMonthDayStyle ForeColor="#999999" />
    <SelectedDayStyle ForeColor="White" />
    <TitleStyle BackColor="White" BorderColor="Black" BorderStyle="None"
        Font-Bold="True" Font-Size="12pt" ForeColor="#333399" />
</asp:Calendar>