presslogin.aspx.cs

ajax+md5实现网站登陆注册模块源代码

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.Text;
using System.Security.Cryptography;
using System.Data.SqlClient;

/// <summary>
/// pressLogin 的摘要说明
/// </summary>
public partial class pressLogin : System.Web.UI.Page
{
	public pressLogin()
	{
		
	}
    private string getMd5(string userPWD)
    {
        string str=null ;
        string strC = null;
        string strP = null;
        byte[] arrHashInput;
        byte[] arrHashOutput;
        MD5CryptoServiceProvider objMD5;

        strP  = userPWD ;
        strC = Session ["valStr"].ToString().Trim();

        objMD5 = new MD5CryptoServiceProvider();
        arrHashInput = Convert2ByteArray(strP +strC);
        arrHashOutput = objMD5.ComputeHash(arrHashInput);
        str = BitConverter.ToString(arrHashOutput);
        str = str.Replace("-", "").ToLower();
        return str;
       

    }
    private byte[] Convert2ByteArray(string strInput)
    {
        int intCounter;
        char[] arrChar;

        arrChar = strInput.ToCharArray();
        byte[] arrByte = new byte[arrChar.Length];

        for (intCounter = 0; intCounter <= arrByte.Length - 1; intCounter++)
            arrByte[intCounter] = Convert.ToByte(arrChar[intCounter]);

        return arrByte;
    }
    #region
    override protected void OnInit(EventArgs e)
    {

        InitializeComponent();
        base.OnInit(e);
    }
   
       
    /// <summary>
    /// 
    private void InitializeComponent()
    {
        this.Load += new System.EventHandler(this.Page_Load);
    }
    #endregion
    public static string SelectTable(string sqlQuery)
    {
        string userPWD=null ;
        SqlDataReader reader = null;

        string strConn = "Initial Catalog = shopping; Data Source=127.0.0.1; Integrated Security=true";
        SqlConnection conn = new SqlConnection(strConn);
        conn.Open();
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandText = sqlQuery;
        cmd.CommandType = CommandType.Text;
        reader = cmd.ExecuteReader();
        
      if ( reader.HasRows !=false )
      { 
          reader.Read();
          userPWD = reader["userPassWorld"].ToString();
      }
      conn.Close();
        return userPWD ;
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        string md5 = null;
        string userPWD = null;
        string str = Request.Params["userName"].ToString().Trim();
        string sqlstr = "select  userPassWorld from UserTab where userName='" + str + "'";
        userPWD=SelectTable(sqlstr ).Trim();
        md5 = getMd5(userPWD );
        string checkCode = Request.Params["userPWD"].ToString();
        if (md5.Equals(checkCode))
        {
            this.Label1.Text = "登陆成功";
        }
        else
        {
            this.Label1.Text = "输入错误,请重新输入";
        }
    }
}