这两天一直在用asp.net实现一个登录功能,收获颇多,分享下本人所得:
首先说明下本人用的开发工具是Microsoft Visual Studio 2010版本,数据库用的是Sql Server 2005。
用sql语句创建用户表userInfo: - create table userInfo(
- userId int not null primary key identity(1,1),
- userName varchar(255),
- password varchar(255),
- remark varchar(255));
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not null 表示非空,primary key表示主键,identity表示自增。
用sql语句添加一个用户admin5: - insert into userInfo(userName,password)values('admin5','admin5');//添加数据
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创建login.aspx页面: - <%@ Page Language="C#" AutoEventWireup="true" CodeFile="login.aspx.cs" Inherits="study_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>loginDemo</title>
- <style type="text/css">
- #lblMessage{ margin-left:5px; color:Red;}
- .yzyh{color:Gray;}
- </style>
- </head>
- <body>
- <form id="form1" runat="server">
- <div>
- <asp:Label ID="Label1" runat="server" Text="用户名:"></asp:Label>
- <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
- <asp:Label ID="Label2" runat="server" Text="密 码:"></asp:Label>
- <asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox><br />
- <asp:Button ID="Button1" runat="server" Text="登录" οnclick="Button1_Click" />
- </div>
- <asp:Label id="lblMessage" runat="server"></asp:Label>
- </form>
- </body>
- </html>
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login.aspx.cs页面来实现登录功能: - using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Web;
- using System.Web.UI;
- using System.Web.UI.WebControls;
- using System.Data.SqlClient;
- using IceLine.Iar.Tools;
-
- public partial class study_login : System.Web.UI.Page
- {
- protected void Page_Load(object sender, EventArgs e)
- {
- //login();
- //queryUserInfo();
- }
- public void login()
- {
- string str = "server=服务器名;database=数据库名;uid=用户名;pwd=密码;Trusted_Connection=no";
- SqlConnection conn = new SqlConnection(str);
- conn.Open();
- string sql = "select * from userInfo where userName=@userName and password=@password";
- SqlCommand comm = new SqlCommand(sql, conn);
- comm.Parameters.Add("userName", TextBox1.Text);
- comm.Parameters.Add("password", TextBox2.Text);
- SqlDataReader sdr = comm.ExecuteReader();
- if (sdr.Read())
- {
- Session["userName"] = TextBox1.Text;
- Session["password"] = TextBox2.Text;
- //lblMessage.Text = "登陆成功!";
- Response.Write("<script>alert('欢迎" + Session["userName"] + ",您成功登录!');location.href='../secure/report/test2.aspx';</script>");
- //Response.Write("<script>alert('登录成功欢迎您');location.href='../secure/report/test2.aspx';</script>");
- }
- else
- {
- lblMessage.Text = "无法登陆,用户名或密码错误!";
- //Response.Redirect("login.aspx");
- }
- //Server.Transfer("../secure/report/test2.aspx");
- //Response.Write("<script>alert('登录成功欢迎您');location.href='../secure/report/test2.aspx';</script>");
- //Response.Write("../secure/report/test.aspx");
- //Response.Redirect("../secure/report/test.aspx");
- conn.Close();
- }
- public void queryUserInfo() {
- clsDbAccept cds = new clsDbAccept();
- Session["userName"] = TextBox1.Text;
- Session["password"] = TextBox2.Text;
- string sql = "select * from userInfo where userName='" + Session["userName"] + " 'and password='" + Session["password"]+"'";
- SqlDataReader sdr = null;
- IarDBManager db = new IarDBManager();
- sdr = db.Query(sql);
- if (sdr.Read())
- {
- Session["userName"] = TextBox1.Text;
- Session["password"] = TextBox2.Text;
- //lblMessage.Text = "登陆成功!";
- Response.Write("<script>alert('欢迎" + Session["userName"] + ",您成功登录!');location.href='../secure/report/test2.aspx';</script>");
- //Response.Write("<script>alert('登录成功欢迎您');location.href='../secure/report/test2.aspx';</script>");
- }
- else
- {
- lblMessage.Text = "无法登陆,用户名或密码错误!";
- //Response.Redirect("login.aspx");
- }
- }
- protected void Button1_Click(object sender, EventArgs e)
- {
- //queryUserInfo();
- login();
- }
- }
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表示用的数据库用户名和密码登录,如果为yes,则用windows登录。上面代码中login()方法和queryUserInfo()方法都是实现用户登录功能,只是用的数据库连接方式不一样,后者用的是现有的封装代码,你可以忽略。
注意:实现登录是点击登录按钮后才触发事件的,并不是刷新页面就加载。如果其他页面想要显示用户名,直接用Session["userName"]
https://blog.csdn.net/qianquan003/article/details/13631301?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param 来源:https://blog.csdn.net/ba_wang_mao/article/details/108072265 免责声明:如果侵犯了您的权益,请联系站长,我们会及时删除侵权内容,谢谢合作! |