checkuser.aspx.cs

提供服务端登陆验证程序（验证码随机改变

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace MDIServer
{
	/// <summary>
	/// Summary description for CheckUser.
	/// </summary>
	public class CheckUser : System.Web.UI.Page
	{
		protected string loginInput;
		protected string pwdInput;
		protected string loginID;
		protected string password;
		protected string actionURL;
		protected string shouldSubmit;
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
			loginInput = AppConfiguration.LoginInput;
			pwdInput = AppConfiguration.PasswordInput;
			actionURL = AppConfiguration.LoginActionURL;

			loginID = Request.QueryString["userName"];
			string encryptedSaltValue = Request.QueryString["saltValue"];
			bool legalUser = false;
			string currentSaltValue = "0";
			using(DBAccess myDBAccess = new DBAccess())
			{
				legalUser = myDBAccess.CheckUser(loginID, ref password, encryptedSaltValue, ref currentSaltValue);
			
				if(legalUser)
				{
					int salt;
					try
					{
						salt = int.Parse(currentSaltValue) + 1;
					}
					catch
					{
						salt = 1;
					}
					string newSaltValue = salt.ToString();
					myDBAccess.UpdateUserSalt(loginID, newSaltValue);
					shouldSubmit = "YES";
				}
				else
				{
					shouldSubmit = "NO";
					Response.Write("用户登陆失败！");
				}
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}