formauthentication.aspx.cs

ASP C#代码实例 适合初学人士学习使用

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.Web.Security;
using System.Security.Principal;
using System.Data.SqlClient;

namespace Example_14_5
{
	/// <summary>
	/// FormAuthentication 的摘要说明。
	/// </summary>
	public class FormAuthentication : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox UserName;
		protected System.Web.UI.WebControls.Button LoginBtn;
		protected System.Web.UI.WebControls.Label LoginMsg;
		protected System.Web.UI.WebControls.TextBox Password;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			//
		}

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

		}
		#endregion

		private void LoginBtn_Click(object sender, System.EventArgs e)
		{
			///判断用户的输入
			if(UserName.Text.Trim().Length <= 0 || Password.Text.Trim().Length <= 0)
			{
				LoginMsg.Text = "用户名称或密码为空，请重新输入！！！";
				return;
			}

			//验证初始化
			FormsAuthentication.Initialize();

			UserDB user = new UserDB();
			SqlDataReader recu = user.GetUserLogin(UserName.Text.Trim(),Password.Text.Trim());

			if(recu.Read())
			{
				FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
					1,
					UserName.Text.Trim(),
					DateTime.Now,
					DateTime.Now.AddMinutes(20),
					true,
					recu["UserID"].ToString(),
					FormsAuthentication.FormsCookiePath);

				string ticketHash = FormsAuthentication.Encrypt(ticket);
				HttpCookie cookie = new HttpCookie(
					FormsAuthentication.FormsCookieName,
					ticketHash);
				
				if(ticket.IsPersistent)
				{
					cookie.Expires = ticket.Expiration;
				}
				Response.Cookies.Add(cookie);
		
				Response.Redirect("AdminPage.aspx");
			}
			else
			{				
				LoginMsg.Text = "用户名称或密码输入错误，请重新输入！！！";
			}
			recu.Close();
		}
	}
}