asp.net下xml当作导航数据源实现动态权限

using System; 
using System.Collections; 
using System.Configuration; 
using System.Data; 
using System.Linq; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.HtmlControls; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Xml; 
using System.IO; 
namespace Root 
{ 
public partial class WebUserControl1 : System.Web.UI.UserControl 
{ 
XmlDocument x = new XmlDocument(); 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!IsPostBack) 
{ 
XMLOperator(); 
} 
} 

/// <summary> 
/// XML操作 
/// </summary> 
private void XMLOperator() 
{ 
XMLLoad(); 
string str = "<table><tr><td>"; 
foreach (XmlNode xn in x.ChildNodes) 
{ 
foreach (XmlNode xn1 in xn.ChildNodes) 
{ 
str += xn1.Attributes["text"].Value; 
str += "</td></tr>"; 
foreach (XmlNode xn2 in xn1.ChildNodes) 
{ 
str += "<tr><td>"; 
str += xn2.Attributes["text"].Value; 
str += "</td></tr>"; 
} 
} 
} 
str += "</table>"; 
Response.Write(str); 
} 
/// <summary> 
/// 加载XML文档 
/// </summary> 
private void XMLLoad() 
{ 
x.Load(Server.MapPath("~/Left.xml")); 
} 

/// <summary> 
/// 读取XML内容 
/// </summary> 
/// <param name="path"></param> 
/// <returns></returns> 
private DataSet ReadXml(string path) 
{ 
DataSet ds = new DataSet(); 
FileStream fs = null; 
StreamReader reader = null; 
try 
{ 
fs = new FileStream(path, FileMode.Open, FileAccess.Read); 
reader = new StreamReader(fs, System.Text.Encoding.UTF8); 
ds.ReadXml(reader); 
return ds; 
} 
finally 
{ 
fs.Close(); 
reader.Close(); 
} 
} 
} 
} 

<?xml version="1.0" encoding="utf-8" ?> 
<menu> 
<submenu id="1" text="校区基本信息"> 
<item text="校区管理" href="SchoolBaseSet/SchoolManagement/SchoolInformation.aspx" href="SchoolBaseSet/SchoolManagement/SchoolInformation.aspx" roles="超级管理员,系统管理员,院校长"></item> 
<item text="班级管理" href="SchoolBaseSet/ClassManagement/ClassInformation.aspx" href="SchoolBaseSet/ClassManagement/ClassInformation.aspx" roles="超级管理员,系统管理员,班主任,院校长,教学主管,教学主任,校区考试专员" ></item> 
<item text="学生信息管理" href="SchoolBaseSet/StudentInformation/StudentInformation.aspx" href="SchoolBaseSet/StudentInformation/StudentInformation.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任" ></item> 
<item text="用户信息管理" href="SchoolBaseSet/UserManagement/UserInformation.aspx" href="SchoolBaseSet/UserManagement/UserInformation.aspx" roles="超级管理员,系统管理员,院校长,教学主管,教学主任"></item> 
<item text="教师审批管理" href="SchoolBaseSet/TeacherPass/TeacherPass.aspx" href="SchoolBaseSet/TeacherPass/TeacherPass.aspx" roles="教学主管,教学主任,校区考试专员"></item> 
<item text="切换教师角色" href="SchoolBaseSet/TeacherPass/RolesChange.aspx" href="SchoolBaseSet/TeacherPass/RolesChange.aspx" roles="校区考试专员"></item> 
</submenu> 
<submenu id="2" text="学生成绩管理"> 
<item text="成绩综合管理" href="StudentGradeManagement/StudentGradedescirption/StudentGradeAll.aspx" href="StudentGradeManagement/StudentGradedescirption/StudentGradeAll.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任" ></item> 
<item text="学生成绩管理" href="StudentGradeManagement/StudentGradedescirption/StudentInformation.aspx" href="StudentGradeManagement/StudentGradedescirption/StudentInformation.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任" ></item> 
</submenu> 
<submenu id="3" text="数据字典设置"> 
<item text="专业管理" href="DataDictionary/Specialty/Specialties.aspx" href="DataDictionary/Specialty/Specialties.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="课程管理" href="DataDictionary/Course/Courses.aspx" href="DataDictionary/Course/Courses.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="专业课程管理" href="DataDictionary/CourseInSpecialty/CouserInSpecialty.aspx" href="DataDictionary/CourseInSpecialty/CouserInSpecialty.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="角色管理" href="DataDictionary/Rolse/Roles.aspx" href="DataDictionary/Rolse/Roles.aspx" roles="超级管理员"></item> 
<item text="管理员管理" href="DataDictionary/AdminUser/AdministratorUser.aspx" href="DataDictionary/AdminUser/AdministratorUser.aspx" roles="超级管理员" ></item> 
<item text="Logo图标管理" href="DataDictionary/Logo/EditLogo.aspx" href="DataDictionary/Logo/EditLogo.aspx" roles="超级管理员,系统管理员,教学主管,教学主任" ></item> 
<item text="学号长度设置" href="DataDictionary/StudentCodeSet/StudentCodeLenghtInf.aspx" href="DataDictionary/StudentCodeSet/StudentCodeLenghtInf.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="恢复设置管理" href="DataDictionary/RemoveSchool/RemoveAllSchool.aspx" href="DataDictionary/RemoveSchool/RemoveAllSchool.aspx" roles="超级管理员" ></item> 
</submenu> 
<submenu id="4" text="考试操作管理"> 
<item text="考试类型管理" href="ExamManagement/ExamType/ExamTypeInformation.aspx" href="ExamManagement/ExamType/ExamTypeInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="试卷模板管理" href="ExamManagement/ExamTemplate/ExamTemplateInformation.aspx" href="ExamManagement/ExamTemplate/ExamTemplateInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="试题类型管理" href="ExamManagement/ExaminationType/ExaminationInformation.aspx" href="ExamManagement/ExaminationType/ExaminationInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="试题题目管理" href="ExamManagement/ExamQuestion/QuestionInformation.aspx" href="ExamManagement/ExamQuestion/QuestionInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="考试申请管理" href="ExamManagement/ExamApplication/ExamApplicationInformation.aspx" href="ExamManagement/ExamApplication/ExamApplicationInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="试卷下载管理" href="ExamManagement/ExamDownLoad/ExamDownLoadInformation.aspx" href="ExamManagement/ExamDownLoad/ExamDownLoadInformation.aspx" roles="超级管理员,系统管理员" ></item> 
<item text="试卷删除管理" href="ExamManagement/ExamPaperDelete/ExamPaperClear.aspx" href="ExamManagement/ExamPaperDelete/ExamPaperClear.aspx" roles="超级管理员,系统管理员" ></item> 
</submenu> 
<submenu id="5" text="报表信息管理"> 
<item text="缓考补考报表" href="ReportInformation/StudentExamState/StudentExamState.aspx" href="ReportInformation/StudentExamState/StudentExamState.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任,校区考试专员" ></item> 
<item text="校区考试报表" href="ReportInformation/ExamGrade/ExamGradeReport.aspx" href="ReportInformation/ExamGrade/ExamGradeReport.aspx" roles="超级管理员,系统管理员,院校长,教学主管,教学主任,校区考试专员" ></item> 
<item text="班级课程报表" href="ReportInformation/StudentExamByClass/StudentExamReport.aspx" href="ReportInformation/StudentExamByClass/StudentExamReport.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任,校区考试专员" ></item> 
</submenu> 
<submenu id="6" text="日志操作管理"> 
<item text="登陆日志管理" href="LoginManagement/LogLogins.aspx" href="LoginManagement/LogLogins.aspx" roles="超级管理员" ></item> 
<item text="操作日志管理" href="LoginManagement/LogOpeations.aspx" href="LoginManagement/LogOpeations.aspx" roles="超级管理员" ></item> 
<item text="日志导出" href="LoginManagement/ErportLog.aspx" href="LoginManagement/ErportLog.aspx" roles="超级管理员" > 
</item> 
</submenu> 
<submenu id="7" text="个人信息管理"> 
<item text="个人资料修改" href="PersonalManagement/PersonalManagement.aspx" href="PersonalManagement/PersonalManagement.aspx" roles="超级管理员,系统管理员,院校长,班主任,教学主管,教学主任,校区考试专员" ></item> 
</submenu> 
</menu>