在asp.net如何取得ActiveDirectory域中用户的信息，比如工号，邮件地址等等

using  System;
using  System.Drawing;
using  System.Collections;
using  System.ComponentModel;
using  System.Windows.Forms;
using  System.Data;
using  System.DirectoryServices ;
using  Palau.DAL ;

namespace  WindowsApplication1
{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.RichTextBox richTextBox1;
        private System.Windows.Forms.TextBox textBox1;
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.richTextBox1 = new System.Windows.Forms.RichTextBox();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(328, 232);
            this.button1.Name = "button1";
            this.button1.TabIndex = 0;
            this.button1.Text = "UPDATE";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // richTextBox1
            // 
            this.richTextBox1.Location = new System.Drawing.Point(24, 16);
            this.richTextBox1.Name = "richTextBox1";
            this.richTextBox1.Size = new System.Drawing.Size(448, 192);
            this.richTextBox1.TabIndex = 1;
            this.richTextBox1.Text = "";
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(144, 232);
            this.textBox1.Name = "textBox1";
            this.textBox1.TabIndex = 2;
            this.textBox1.Text = "GES";
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(496, 273);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.richTextBox1);
            this.Controls.Add(this.button1);
            this.Name = "Form1";
            this.Text = "Create User";
            this.ResumeLayout(false);

        }
        #endregion

        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void AddUser(DirectoryEntry obj,PersistBroker broker)
        {
            string sSQL = @"INSERT INTO TBLSYSUSER([USE_CODE],[USE_NAME],[USE_PWD],[USE_WORKNO],[USE_DOMAIN],[USE_EMAIL],[USE_LEVEL],"
                +"[USE_MSN], [USE_QQ], [USE_EXTPHONE], [USE_MOBILE], [USE_HOMEPHONE], [USE_BIRTHDAY], [USE_LOVE], [USE_ADDR], [USE_WEMAIL],"
                +"[USE_HOMEPAGE], [USE_KNOWLEDGE],[USE_ACTIVE],[USE_SEX],[TEM_CODE],[USE_IFCUSTOMER],[DEP_CODE],[USE_CREATEDATE]) VALUES(@CODE,@NAME, @PWD,@WORKNO,@DOMAIN,@EMAIL, @LEVEL, @MSN,@QQ,@EXTPHONE,@MOBILE,"
                + "@HOMEPHONE,@BIRTHDAY,@LOVE,@ADDR,@WEMAIL,@HOMEPAGE,@KNOWLEDGE,@ACTIVE,@SEX,@TEM_CODE,@IFCUSTOMER,@DEP_CODE,@CREATEDATE) ";
            string[] paramNames = new string[]{"@CODE","@NAME","@PWD","@WORKNO","@DOMAIN","@EMAIL","@LEVEL","@MSN","@QQ","@EXTPHONE",
                                                  "@MOBILE","@HOMEPHONE","@BIRTHDAY","@LOVE","@ADDR","@WEMAIL","@HOMEPAGE","@KNOWLEDGE",
                                                  "@ACTIVE","@SEX","@TEM_CODE","@IFCUSTOMER","@DEP_CODE","@CREATEDATE"};
            string SSQL = @"SELECT 1 FROM TBLSYSUSER WHERE USE_CODE=@CODE";
            string[] paramsName = new string[]{"@CODE"};
            

            if(obj.SchemaClassName.Trim().ToUpper()=="ORGANIZATIONALUNIT")
            {
                string strDept = obj.Name.Trim().Split('=')[1] ;
                DirectoryEntries subList = obj.Children ;
                foreach(DirectoryEntry objSubDE in subList)
                {
                    if(objSubDE.SchemaClassName.Trim().ToUpper()=="USER")
                    {
                        AddUser(objSubDE,broker);
                    }
                }
            }
            else if(obj.SchemaClassName.Trim().ToUpper()=="USER")
            {
                
                string Code = obj.Properties["name"].Value==null?"":obj.Properties["name"].Value.ToString() ;

                string Name = obj.Properties["sn"].Value == null ? "" : obj.Properties["sn"].Value.ToString();                
                string department = obj.Properties["department"].Value == null ? "" : obj.Properties["department"].Value.ToString();
                string workno = obj.Properties["wWWHomePage"].Value == null ? "" : obj.Properties["wWWHomePage"].Value.ToString();
                if(workno == "http://personal/kevin jiang/") {workno="0406102";} 
                string phone = obj.Properties["telephoneNumber"].Value == null ? "" : obj.Properties["telephoneNumber"].Value.ToString();
                string Level = obj.Properties["title"].Value == null ? "" : obj.Properties["title"].Value.ToString();
                
                string address = obj.Properties["co"].Value == null ? "" : obj.Properties["co"].Value.ToString() + " " + obj.Properties["l"].Value == null ? "" : obj.Properties["l"].Value.ToString();
                string createdate = obj.Properties["whenCreated"].Value == null ? "" : obj.Properties["whenCreated"].Value.ToString() ;
                string mail = obj.Properties["mail"].Value == null ? "" : obj.Properties["mail"].Value.ToString();
                if(workno != string.Empty || Code != "asf" )
                {
                    
                    object[] paramValues = new object[]{Code,Name,"9D6C539199026AF7",workno,"BQC",mail,Level,"","",phone,
                                                           "","","1970-1-1","","",address,"","","Y","1",department,"N",department,createdate};
                    

                    object[] paramsValue = new object[]{Code};
                    DataSet ds = broker.ExecuteDataset(SSQL,CommandType.Text,paramsName,paramsValue);
                    if(ds.Tables[0].Rows.Count == 0)
                    {
                        broker.ExecuteNonQuery(sSQL,CommandType.Text,paramNames,paramValues) ;
                    
                    
                    }
                    else
                    {
                        string sSQLU = @"UPDATE TBLSYSUSER SET [USE_NAME]=@NAME, [USE_WORKNO]=@WORKNO, [USE_DOMAIN]=@DOMAIN, "+
                            "[USE_EMAIL]=@EMAIL, [USE_LEVEL]=@LEVEL, [USE_EXTPHONE]=@EXTPHONE,"+
                            "[USE_ADDR]=@ADDR, [USE_ACTIVE]=@ACTIVE,[DEP_CODE] = @DEP_CODE,[USE_CREATEDATE]=@CREATEDATE,"+
                            "[USE_IFCUSTOMER]=@IFCUSTOMER WHERE [USE_CODE]=@CODE";
                        broker.ExecuteNonQuery(sSQLU,CommandType.Text,paramNames,paramValues) ;
                
                    }
                }
                this.richTextBox1.AppendText( department + "\t" +  Code  + "\t" + Name + "\r\n") ;
            }
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            this.richTextBox1.Text = "";
            try
            {
                string conn = System.Configuration.ConfigurationSettings.AppSettings["CONN"];
                PersistBroker broker = PersistBroker.Instance(conn,"SQLSERVER") ;
                broker.Open() ;

                DirectoryEntry de = new DirectoryEntry() ;
                string dept = this.textBox1.Text;
                if(dept != string.Empty)
                {
                    dept= "OU="+dept+",";
                }
                de.Path = "LDAP://"+dept+"OU=G00,OU=Users Guru,DC=mycom,dc=corp,dc=com" ;
                de.Username= "mycom\\andy luo";//System.Configuration.ConfigurationSettings.AppSettings["USER"];
                de.Password = "";// System.Configuration.ConfigurationSettings.AppSettings["PWD"] ;
                DirectoryEntries list = de.Children ;
                foreach(DirectoryEntry objDE in list)
                {
                    this.AddUser(objDE,broker);
                                
                broker.Close() ;
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message) ;
            }
        }
    }
}