TechServise/СУБД Техносервис/FormMain.cs

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 СУБД_Техносервис
{
    public partial class FormMain : Form
    {
        public FormMain()
        {
            InitializeComponent();
        }

        string Captcha;

        /// <summary>
        /// сгенерировать символы капчи
        /// </summary>
        void GetCapcha()
        {
            Captcha = Guid.NewGuid().ToString().Substring(0, 4);
            LblC1.Text = Captcha[0].ToString();
            LblC2.Text = Captcha[1].ToString();
            LblC3.Text = Captcha[2].ToString();
            LblC4.Text = Captcha[3].ToString();
            TbxCapcha.Clear();
        }


        private void FormMain_Load(object sender, EventArgs e)
        {
            // TODO: данная строка кода позволяет загрузить данные в таблицу "techServiceBAUDataSet.Employee". При необходимости она может быть перемещена или удалена.
            this.employeeTableAdapter.Fill(this.techServiceBAUDataSet.Employee);
        }

        private void CbxShowPassw_CheckedChanged(object sender, EventArgs e)
        {
            TbxPassw.UseSystemPasswordChar = !TbxPassw.UseSystemPasswordChar;
        }

        private void BtnVhod_Click(object sender, EventArgs e)
        {

            if (TbxCapcha.Text != Captcha && PanelCapcha.Visible == true)
            {
                GetCapcha();
                BtnVhod.Enabled = false;
                TimerForLogin.Start();

                MessageBox.Show("Неверная капча.", "Внимание!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }
            BsEmployee.Filter = $"Password = '{TbxPassw.Text}' and Login = '{TbxLogin.Text}'";
            if (BsEmployee.Count == 0)
            {
                if (!PanelCapcha.Visible)
                {
                    PanelCapcha.Visible = true;
                }
                else
                {
                    BtnVhod.Enabled = false;
                    TimerForLogin.Start();
                }
                GetCapcha();

                MessageBox.Show("Неверный логин или пароль.", "Внимание!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }
            FormWorkPlace FrmWork = new FormWorkPlace();
            this.Hide();
            FrmWork.BsEmployee.Filter = $"Login = '{TbxLogin.Text}'";
            FrmWork.ShowDialog();
            this.Show();
            GetCapcha();
            TbxLogin.Clear();
            TbxPassw.Clear();
            PanelCapcha.Visible = false;
            TbxCapcha.Clear();
            this.employeeTableAdapter.Fill(this.techServiceBAUDataSet.Employee);
        }

        private void PCapcha_Paint(object sender, PaintEventArgs e)
        {
            Random Rnd = new Random();
            for (int i = 0; i < 7; i++)
            {
                e.Graphics.DrawLine(new Pen(Color.Black, 2), 0, Rnd.Next(PCapcha.Height), PCapcha.Width, Rnd.Next(PCapcha.Height));
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            GetCapcha();
        }

        private void TimerForLogin_Tick(object sender, EventArgs e)
        {
            BtnVhod.Enabled = true;
            TimerForLogin.Stop();
        }
    }
}