这是我的代码，我知道了
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>GridView With ModalPopUpExtender</title>
错误1无效的表达式术语 '＆LT;' C：\ Users \ Nehal \ Desktop \ modalpopupcontrol \ Default.aspx 1 1 C：... \ modalpopupcontrol \ 错误2; 预期C：\ Users \ Nehal \ Desktop \ modalpopupcontrol \ Default.aspx 1 1 C：... \ modalpopupcontrol \ 错误3无效的表达式术语 '：'C：\ Users \ Nehal \ Desktop \ modalpopupcontrol \ Default.aspx 1 1 C：... \ modalpopupcontrol \ 错误4; 预期C：\ Users \ Nehal \ Desktop \ modalpopupcontrol \ Default.aspx 1 1 C：... \ modalpopupcontrol \