login.aspx.cs

这个工程实现了一个网上书店的功能。很适用

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.SqlClient;
using System.Configuration;

namespace bookshop
{
	/// <summary>
	/// login 的摘要说明。
	/// </summary>
	public class login : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Message;
		protected System.Web.UI.WebControls.TextBox userid;
		protected System.Web.UI.WebControls.RequiredFieldValidator UserNameRequired;
		protected System.Web.UI.WebControls.TextBox password;
		protected System.Web.UI.WebControls.RequiredFieldValidator passwordRequired;
		protected System.Web.UI.WebControls.ImageButton LoginBtn;
		protected System.Web.UI.WebControls.HyperLink BackHyperLink;
		protected System.Web.UI.WebControls.HyperLink Hyperlink1;
		protected System.Web.UI.HtmlControls.HtmlForm Form1;
	
		public login() 
		{
			Page.Init += new System.EventHandler(Page_Init);
		}
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}
		private void Page_Init(object sender, EventArgs e) 
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
		}

		#region Web 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.LoginBtn.Click += new System.Web.UI.ImageClickEventHandler(this.LoginBtn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void LoginBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			string strconn=ConfigurationSettings.AppSettings["ConnectionString"];
			SqlConnection conn=new SqlConnection(strconn);
			conn.Open();
			string strsql="select * from userinfo where userid='"+userid.Text+"' and password='"+password.Text+"'";
			SqlCommand cm=new SqlCommand(strsql,conn);
			SqlDataReader dr=cm.ExecuteReader();
			if(dr.Read())
			{
				//保存用户权限
					Session["userid"]=dr["userid"];
					Response.Redirect("login.aspx");		
					
				
			}
			else
			{
				Message.Text="登录失败，请检查用户名、密码输入！";
			}
		}
	}
}