当我运行此页面时，我在应用程序中添加了一个DataPager控件，我收到以下错误。
安全例外
描述：
应用程序尝试执行安全策略不允许的操作。要授予此应用程序所需的权限，请与您的系统管理员联系或在配置文件中更改应用程序的信任级别。
异常详细信息：System.Security.SecurityException：请求类型为'System.Web.AspNetHostingPermission，System，Version = 2.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089'的权限失败。
来源错误：
在执行当前Web请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常的起源和位置的信息。
堆栈追踪：
[SecurityException：请求类型'System.Web.AspNetHostingPermission，System，Version = 2.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089'的权限失败。 System.Reflection.Assembly._GetType（String name，Boolean throwOnError，Boolean ignoreCase）+0 System.Web.UI.NamespaceTagNameToTypeMapper.GetControlType（String tagName，IDictionary attribs，Boolean throwOnError）+98 System.Web.UI.NamespaceTagNameToTypeMapper.System.Web.UI.ITagNameToTypeMapper.GetControlType（String tagName，IDictionary attribs）+11 System.Web.UI.TagPrefixTagNameToTypeMapper.System.Web.UI.ITagNameToTypeMapper.GetControlType（String tagName，IDictionary attribs）+127 System.Web.UI.MainTagNameToTypeMapper.GetControlType2（String tagName，IDictionary attribs，Boolean fAllowHtmlTags）+228 System.Web.UI.MainTagNameToTypeMapper.GetControlType（String tagName，IDictionary attribs，Boolean fAllowHtmlTags）+28 System.Web.UI.RootBuilder.GetChildControlType（String tagName，IDictionary attribs）+20 System.Web.UI.ControlBuilder.CreateChildBuilder（String filter，String tagName，IDictionary attribs，TemplateParser parser，ControlBuilder parentBuilder，String id，Int32 line，VirtualPath virtualPath，Type＆amp; childType，Boolean defaultProperty）+69 System.Web.UI.TemplateParser.ProcessBeginTag（匹配匹配，String inputText）+526 System.Web.UI.TemplateParser.ParseStringInternal（String text，Encoding fileEncoding）+926
以下是代码
<%@ Page Language="VB" MasterPageFile="~/CIOSMasterNonAuth.master" AutoEventWireup="false" CodeFile="ViewOrdersChanged.aspx.vb" Inherits="ViewOrders" title="Untitled Page" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<%--<asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager>--%>
<asp:Table runat="server" Font-Size="Small" HorizontalAlign="Center">
<asp:TableRow>
<asp:TableCell HorizontalAlign="Right">
<asp:Label runat="server">Order Status: </asp:Label>
</asp:TableCell>
<asp:TableCell HorizontalAlign="Left">
<asp:DropDownList ID="OrderStatusDropDownList" runat="server" AutoPostBack="True">
<asp:ListItem Text="Verified" Value="V" />
<asp:ListItem Text="New" Value="N" />
<asp:ListItem Text="Cancelled" Value="C" />
</asp:DropDownList>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell ColumnSpan="2">
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1">
<HeaderTemplate>
<table border="1" visible="false">
<tr>
<th>
Web Order ID
</th>
<th>
Web Entry Date
</th>
<th>
Protocol Number
</th>
<th>
Site Number
</th>
<th>
Pharmacist of Record
</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<asp:LinkButton runat="server" ID="lnkOrderDetails" Text='<%# Eval("web_order_id") %>' OnClick="lnkOrderDetails_Click" />
</td>
<td>
<asp:Label ID="lblWebEntryDate" runat="server" Text='<%# Eval("web_entry_date") %>'>
</asp:Label>
</td>
<td>
<asp:Label ID="lblProtocolNum" runat="server" Text='<%# Eval("protocol_num") %>'>
</asp:Label>
</td>
<td>
<asp:Label ID="lblSiteNum" runat="server" Text='<%# Eval("site_num") %>'>
</asp:Label>
</td>
<td>
<asp:Label ID="lblPharmName" runat="server" Text='<%# Eval("PharmName") %>'>
</asp:Label>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Button runat="server" ID="btnShowModalPopup" style="display:none"/>
<cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server"
TargetControlID="btnShowModalPopup"
PopupControlID="divPopUp"
PopupDragHandleControlID="panelDragHandle">
</cc1:ModalPopupExtender>
<div id="divPopUp" style="display:none; font-family:Georgia; font-size:small;">
<asp:Panel runat="Server" ID="panelDragHandle" BackColor="#009999" BorderColor="ActiveBorder" BorderStyle="Ridge" ForeColor="White" Width="800px">
<table width="100%">
<tr>
<td>
Hold here to Drag this Box
</td>
<td align="right">
<asp:Label runat="server" ID="lblText" Text="Web OrderID: " ForeColor="White"></asp:Label>
<asp:Label ID="lblWebOrderID" runat="server"></asp:Label>
</td>
</tr>
<tr>
<td colspan="2">
<asp:GridView ID="GridView2" runat="server" BackColor="#FFFFCC" ForeColor="Black" AutoGenerateColumns="False" Width="100%" >
<Columns>
<asp:BoundField DataField="line_id" HeaderText="Line Item"/>
<asp:BoundField DataField="no_of_participants" HeaderText="Number of Participants" />
<asp:BoundField DataField="amt_inventory" HeaderText="Current Inventory"/>
<asp:BoundField DataField="nsc_num" HeaderText="NSC number"/>
<asp:BoundField DataField="drug_name" HeaderText="Drug name"/>
<asp:BoundField DataField="dose_str" HeaderText="Dose Strength"/>
<asp:BoundField DataField="dose_unit" HeaderText="Dose Unit"/>
<asp:BoundField DataField="dose_form_comment" HeaderText="Dose Form"/>
<asp:BoundField DataField="dose_mult" HeaderText="Dose Mult" />
<asp:BoundField DataField="amt_req" HeaderText="Amt Required"/>
</Columns>
</asp:GridView>
</td>
</tr>
<tr>
<td colspan="2" align="right">
<asp:Button ID="btnClose" runat="server" Text="Close" />
</td>
</tr>
</table>
</asp:Panel>
<br />
</div>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="
<%$ ConnectionStrings:CIOSConnectionString3 %>" SelectCommand="SELECT w.web_order_id, w.web_entry_date, w.site_num, w.protocol_num, w.inv_num, w.pharm_num, w.status, w.Comments, w.UserName, w.porStatus, ISNULL(p.Pharm_fname, ' ') + ' ' + ISNULL(p.Pharm_lname, ' ') AS 'PharmName' FROM Web_Shipping AS w INNER JOIN Pharmacist_of_record AS p ON p.pharm_num = w.pharm_num WHERE (w.status = @status) ORDER BY w.web_order_id DESC" >
<SelectParameters>
<asp:ControlParameter ControlID="OrderStatusDropDownList" Name="Status"
PropertyName="Text" Type="Char" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:CIOSConnectionString3 %>"
SelectCommand="SELECT Web_Ship_detail.line_id, Web_Ship_detail.no_of_participants, Web_Ship_detail.Amt_inventory, Web_Ship_detail.NSC_num, Web_Ship_detail.Dose_str, Web_Ship_detail.Dose_unit, Web_Ship_detail.Dose_mult, Web_Ship_detail.amt_req, Drug.Drug_name, Dosage_Form.dose_form_comment FROM Web_Ship_detail INNER JOIN Drug ON Web_Ship_detail.NSC_num = Drug.NSC_Num INNER JOIN Dosage_Form ON Web_Ship_detail.Dose_form = Dosage_Form.dose_form WHERE (Web_Ship_detail.web_order_id = @web_order_id) ORDER BY Web_Ship_detail.line_id">
<SelectParameters>
<asp:ControlParameter ControlID="lblWebOrderID" Name="web_order_id"
PropertyName="Text" Type="Decimal" />
</SelectParameters>
</asp:SqlDataSource>
<asp:DataPager ID="DataPager1"
PagedControlID="OrderStatusDropDownList"
PageSize="5" runat="server">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button"
ShowFirstPageButton="true"
ShowLastPageButton="true"
ShowNextPageButton="true"
ShowPreviousPageButton="true" />
</Fields>
</asp:DataPager>
</asp:Content>