Backup/Web/Main/OnlineUser.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Security.Cryptography;
using System.Text;

public partial class OnlineUser : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            BindTree(this.ListTreeView.Nodes, 0);
        }
    }
    protected static string DecryptDBStr(string Text, string sKey)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        int len;
        len = Text.Length / 2;
        byte[] inputByteArray = new byte[len];
        int x, i;
        for (x = 0; x < len; x++)
        {
            i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
            inputByteArray[x] = (byte)i;
        }
        des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
        des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();
        return Encoding.Default.GetString(ms.ToArray());
    } 
    private void BindTree(TreeNodeCollection Nds, int IDStr)
    {
        SqlConnection Conn = new SqlConnection(DecryptDBStr(ConfigurationManager.AppSettings["SQLConnectionString"].ToString(),"zhangweilong"));
        Conn.Open();
        SqlCommand MyCmd = new SqlCommand("select * from ERPBuMen where DirID=" + IDStr.ToString() + " order by ID asc", Conn);
        SqlDataReader MyReader = MyCmd.ExecuteReader();
        while (MyReader.Read())
        {
            TreeNode OrganizationNode = new TreeNode();
            OrganizationNode.Text = MyReader["BuMenName"].ToString();
            OrganizationNode.Value = MyReader["ID"].ToString();
            int strId = int.Parse(MyReader["ID"].ToString());
            OrganizationNode.ImageUrl = "~/images/user_group.gif";
            OrganizationNode.SelectAction = TreeNodeSelectAction.Expand;
            OrganizationNode.Expanded = true;           

            /////////////////////////////////////////////////////////////////////////////////////////////////////