weblogin.aspx.cs

这是一个用asp.net编写的实用登陆验证源码

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;
using System.Data.OleDb;
namespace Weblogin
{
	/// <summary>
	/// weblogin 的摘要说明。
	/// </summary>
	public class weblogin : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox TextBox1;
		protected System.Web.UI.WebControls.TextBox TextBox2;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.ValidationSummary ValidationSummary1;
		protected System.Web.UI.WebControls.Button Button2;
		private void Page_Load(object sender, System.EventArgs e)
		{
//			if(!this.IsPostBack)
//			{
//				
//			}
			// 在此处放置用户代码以初始化页面
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <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.Click += new System.EventHandler(this.Button1_Click);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button2_Click(object sender, System.EventArgs e)
		{
			TextBox1.Text = "";
			TextBox2.Text = "";
			Session.Clear();
		}

		private void Button1_Click(object sender, System.EventArgs e)
		{
			try
			{
				OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source= "+Server.MapPath("admin.mdb"));
				con.Open();
				OleDbCommand com = new OleDbCommand("select * from admin where user='"+TextBox1.Text+"'and paw='"+TextBox2.Text+"'",con);				
				if(com.ExecuteScalar()!=null)
				{
					Session["kk"]=this.TextBox1.Text.ToString();
					con.Close();
					Response.Redirect("admin.aspx");
				}
				else
				{
//					Response.Write("<script language='javascript'>alert('用户名或密码错误!')</script>");
					Response.Redirect("weblogin.aspx");
				}
			}
			catch (Exception ee)
			{
				Response.Write(ee.Message.ToString());
//				Response.Redirect("weblogin.aspx");
			}
//			finally
//			{
//				
//			}
		}
	}
}