asd/konkursTest14/Form2.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;
using System.Data.SqlClient;
namespace konkursTest14
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_FormClosing(object sender, FormClosingEventArgs e)
        {
            Application.Exit();
        }

        private void addUser_Click(object sender, EventArgs e)
        {
            String connString = "Data Source=CLASS3108;Initial Catalog=konkurstest;Integrated Security=True";
            SqlConnection conn = new SqlConnection(connString);
            SqlCommand command = new SqlCommand("INSERT INTO users(login,password,admin,manager)VALUES(@login,@password,@admin,@manager)", conn);
            command.Parameters.Add("@login", Login.Text);
            command.Parameters.Add("@password", password.Text);

           
            conn.Open();
            try
            {
                if (AdminButton.Checked)
                {
                    command.Parameters.Add("@admin", "1");
                }else
                {
                    command.Parameters.Add("@admin", "0");
                }
                if (ManagerButton.Checked)
                {
                    command.Parameters.Add("@manager", "1");
                }
                else
                {
                    command.Parameters.Add("@manager", "0");
                }
                command.ExecuteNonQuery();
                MessageBox.Show("Пользователь успешно добавлен", "успешно", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message.ToString(), "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {

            }
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void Login_Enter(object sender, EventArgs e)
        {
            if (Login.Text == "Введите логин")
            {
                Login.Text = "";
            }
        }

        private void Login_Leave(object sender, EventArgs e)
        {
            if (Login.Text == "")
            {
                Login.Text = "Введите логин";
            }
        }

        private void password_Enter(object sender, EventArgs e)
        {
            if (password.Text == "Введите пароль")
            {
                password.Text = "";
            }
        }

        private void password_Leave(object sender, EventArgs e)
        {
            if (password.Text == "")
            {
                password.Text = "Введите пароль";
            }
        }

        private void Delete_Click(object sender, EventArgs e)
        {
            String connString = "Data Source=CLASS3108;Initial Catalog=konkurstest;Integrated Security=True";
            SqlConnection conn = new SqlConnection(connString);
            SqlCommand command = new SqlCommand("DELETE FROM users where login = @login", conn);
            command.Parameters.Add("@login", LoginDel.Text);

            conn.Open();

            try
            {
                command.ExecuteNonQuery();
                MessageBox.Show("Пользователь успешно удален", "Успешно", MessageBoxButtons.OK,MessageBoxIcon.Information);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message.ToString(), "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {

            }
        }

        private void LoginDel_Enter(object sender, EventArgs e)
        {
            if(LoginDel.Text == "Введите логин")
            {
                LoginDel.Text = "";
            }
        }

        private void LoginDel_Leave(object sender, EventArgs e)
        {
            if (LoginDel.Text == "")
            {
                LoginDel.Text = "Введите логин";
            }
        }
    }
}