1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5
6 namespace HotelMIS
7 {
8 public static class DBHelper
9 {
10 //连接数据库字符串
11 public static readonly string conStr = "Server=.;Database=HotelManager;Integrated security=true";
12 }
13 }
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9 using Hotel.BLL;
10 using System.Data.SqlClient;
11
12 namespace HotelMIS
13 {
14 public partial class Form1 : Form
15 {
16 public Form1()
17 {
18 InitializeComponent();
19 }
20
21 //登录按钮事件
22 private void btnLogin_Click(object sender, EventArgs e)
23 {
24 if (textBox1.Text.Trim() == "" || string.IsNullOrEmpty(textBox1.Text))
25 {
26 MessageBox.Show("用户名不能为空!", "登录提示");
27 }
28 else if (textBox2.Text.Trim() == "" || string.IsNullOrEmpty(textBox2.Text))
29 {
30 MessageBox.Show("密码不能为空", "登录提示");
31 }
32 else
33 {
34 SqlConnection con = new SqlConnection(DBHelper.conStr);
35 try
36 {
37 con.Open();
38 string sql = string.Format("select * from HotelUser where UserName = ‘{0}‘ and Password = ‘{1}‘", textBox1.Text, textBox2.Text);
39 SqlCommand cmd = new SqlCommand(sql, con);
40 SqlDataReader dr = cmd.ExecuteReader();
41 if (dr.Read())
42 {
43 MessageBox.Show("登录成功", "登录提示");
44 }
45 else
46 {
47 MessageBox.Show("用户名或密码错误", "登录提示");
48 }
49 dr.Close();
50 }
51 catch (Exception)
52 {
53 MessageBox.Show("请检查连接字符串", "登录提示");
54 }
55 finally
56 {
57 con.Close();
58 }
59 }
60 }
61 }
62 }
ASP.NET用户登录按钮事件
时间： 2024-11-10 00:20:16