login.cs

这是一个考勤系统大家多多指教

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace kaoqin
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (this.radioButton1.Checked == true)
            {
                string sql = "select * from admin where name='"+this.textBox1.Text+"' and pwd='"+this.textBox2.Text+"'";
                DataTable dt = DB.getTable(sql);
                if (dt.Rows.Count == 0)
                {
                    MessageBox.Show("用户名或密码错误!");
                }
                DB.admin = true;
                DB.userName = dt.Rows[0]["name"].ToString();
                kaoqin.main m = new main();
                m.Show();
                this.Hide();
            }
            else
            {
                string sql = "select * from [user] where name='" + DB.userName + "'";
                DataTable dt = DB.getTable(sql);
                if (dt.Rows.Count == 0)
                {
                    MessageBox.Show("用户名或密码错误!");
                }
                DB.userName = dt.Rows[0]["name"].ToString();
                kaoqin.main m = new main();
                m.Show();
                this.Hide();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}