本文给大家介绍的是.net实现网站用户登录认证的方法和实例,都非常的简单实用,需要的小伙伴可以参考下。
cookie登录后同域名下的网站保持相同的登录状态。
登录
- private void SetAuthCookie(string userId, bool createPersistentCookie)
- {
- var ticket = new FormsAuthenticationTicket(2, userId, DateTime.Now, DateTime.Now.AddDays(7), true, "", FormsAuthentication.FormsCookiePath);
- string ticketEncrypted = FormsAuthentication.Encrypt(ticket);
- HttpCookie cookie;
- if (createPersistentCookie)//是否在设置的过期时间内一直有效
- {
- cookie = new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
- {
- HttpOnly = true,
- Path = FormsAuthentication.FormsCookiePath,
- Secure = FormsAuthentication.RequireSSL,
- Expires = ticket.Expiration,
- Domain = "cnblogs.com"//这里设置认证的域名,同域名下包括子域名如aa.cnblogs.com或bb.cnblogs.com都保持相同的登录状态
- };
- }
- else
- {
- cookie = new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
- {
- HttpOnly = true,
- Path = FormsAuthentication.FormsCookiePath,
- Secure = FormsAuthentication.RequireSSL,
- //Expires = ticket.Expiration,//无过期时间的,浏览器关闭后失效
- Domain = "cnblogs.com"
- };
- }
- HttpContext.Current.Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
- HttpContext.Current.Response.Cookies.Add(cookie);
- }
这样登录后,在同域名下的任何页面都可以得到用户状态
判断用户是否登录
- public bool IsAuthenticated
- {
- get
- {
- bool isPass = System.Web.HttpContext.Current.User.Identity.IsAuthenticated;
- if (!isPass)
- SignOut();
- return isPass;
- }
- }
得到当前的用户名
- public string GetCurrentUserId()
- {
- return _httpContext.User.Identity.Name;
- }
下面给大家一个具体的实例
CS页代码:
- 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.Data.SqlClient;
- public partial class Login : System.Web.UI.Page
- {
- protected void Page_Load(object sender, EventArgs e)
- {
- }
- protected void Button1_Click(object sender, EventArgs e)
- {
- string connString = Convert.ToString(ConfigurationManager.ConnectionStrings["001ConnectionString"]);
- //001ConnectionString是我在webconfig里配置的数据库连接。
- SqlConnection conn = new SqlConnection(connString);
- string strsql = "select * from User_table where User_name='" + UserName.Text + "' and Password='" + Password.Text + "'";
- SqlCommand cmd = new SqlCommand(strsql, conn);
- conn.Open();
- SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
- if (dr.Read())
- {
- Response.Redirect("index.aspx");
- conn.Close();
- }
- else
- {
- FailureText.Text = "登陆失败,请检查登陆信息!";
- conn.Close();
- Response.Write("<script language=javascript>alert('登陆失败!.');</script>");
- }
- }
- protected void Button2_Click(object sender, EventArgs e) //文本框重置按钮
- {
- UserName.Text = "";
- Password.Text = "";
- }
- }
下面是aspx页面代码:
- <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %>
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns=" http://www.w3.org/1999/xhtml" >
- <head runat="server">
- <title>无标题页</title>
- </head>
- <body>
- <form id="form1" runat="server">
- <asp:Panel ID="Panel1" runat="server" Height="101px" Width="231px" Wrap="False">
- <table>
- <tr>
- <td align="center" colspan="2">
- 用户登陆</td>
- </tr>
- <tr>
- <td style="width: 89px">
- 用户名:</td>
- <td style="width: 100px">
- <asp:TextBox ID="UserName" runat="server" Wrap="False"></asp:TextBox></td>
- </tr>
- <tr>
- <td style="width: 89px">
- 密码:</td>
- <td style="width: 100px">
- <asp:TextBox ID="Password" runat="server" TextMode="Password" Width="148px" Wrap="False" ></asp:TextBox></td>
- </tr>
- <tr>
- <td align="center" colspan="2" style="text-align: center">
- <asp:Button ID="Button1" runat="server" Text="登陆" Width="50px" OnClick="Button1_Click" />
- <asp:Button ID="Button2" runat="server" Text="重置" Width="50px" OnClick="Button2_Click" /></td>
- </tr>
- <tr>
- <td align="center" colspan="2">
- <asp:Label ID="FailureText" runat="server" Width="77px"></asp:Label></td>
- </tr>
- </table>
- </asp:Panel>
- </form>
- </body>
- </html>
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