BaitapC#.TH05

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

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "1";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "2";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "3";
        }

        private void button4_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "0";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "4";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "5";
        }

        private void button7_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "6";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "7";
        }

        private void button10_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "8";

        }

        private void button11_Click(object sender, EventArgs e)
        {
            MatKhau.Text = MatKhau.Text + "9";
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            MatKhau.Text = "";
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            if (MatKhau.TextLength < 5)
            {
                int matkhau = int.Parse(MatKhau.Text);

                if (matkhau == 1980 || matkhau == 1982)
                {
                    DateTime t = DateTime.Now;
                    NhatKy.Text += t.ToShortDateString() + " " + t.ToLongTimeString() + "    Kỹ thuật \n";
                }
                else if (matkhau > 2008 && matkhau <= 2010)
                {
                    DateTime t = DateTime.Now;
                    NhatKy.Text += t.ToShortDateString() + " " + t.ToLongTimeString() + "    Quản lý \n";
                }
                else if (matkhau == 9998 || (matkhau >= 1006 && matkhau <= 1008))
                {
                    DateTime t = DateTime.Now;
                    NhatKy.Text += t.ToShortDateString() + "  " + t.ToLongTimeString() + "    Khoa học \n";
                }
                else if (matkhau >= 0 && matkhau <= 9)
                {
                    DateTime t = DateTime.Now;
                    NhatKy.Text += t.ToShortDateString() + "  " + t.ToLongTimeString() + "    Restricted Access \n";
                }
                else
                {
                    DateTime t = DateTime.Now;
                    NhatKy.Text += t.ToShortDateString() + "  " + t.ToLongTimeString() + "    Access denied \n";
                }
            }
            else
            {

                DateTime t = DateTime.Now;
                NhatKy.Text += t.ToShortDateString() + "  " + t.ToLongTimeString() + "    Access denied\n";
            }

            MatKhau.Text = "";

        }
    }
}