在asp.net中对XML文档进行的操作（不全，待续）

Class.xml
<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/css" href="class.css"?>
<bookdetail>
<book class="A">
<author>曹雪芹</author>
<title>红楼梦</title>
<price>60.00</price>
</book>
<book class="A"& ......

ID.xml
<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/css" href="ID.css"?>
<bookdetail>
<book class="A" id="B1">
<author>曹雪芹</author>
<title>红楼梦</title>
<price>60.00</price>
</book>
<book class="A ......

HttpContext.Current.Request.Url.ToString() 并不可靠。
如果当前URL为
http://localhost/search.aspx?user=http://csharp.xdowns.com&tag=%BC%BC%CA%F5
通过HttpContext.Current.Request.Url.ToString()获取到的却是
http://localhost/search.aspxuser=http://csharp.xdowns.com&tag=&frac14;&fra ......

+++ PassDatatableByCache01.aspx页面
++ 页台代码如下：
<asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="用Cache传数据集"></asp:Button>
++ 后台代码如下：
protected void Button1_Click(object sender, EventArgs e)
{
  string connStr = "Data Source=ora11g;uid=sc ......