prelastconk/testkonkurs1/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 testkonkurs1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void AddUser_Click(object sender, EventArgs e)
        {
            string connString = "Data Source=DESKTOP-Q8BTJMH;Initial Catalog=Testkonkurs;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.AddWithValue("@login", login.Text);
            command.Parameters.AddWithValue("@password", password.Text);
            if (admin.Checked)
            {
                command.Parameters.AddWithValue("@admin", "1");
            }
            else
            {
                command.Parameters.AddWithValue("@admin", "0");
            }
            if (manager.Checked)
            {
                command.Parameters.AddWithValue("@manager", "1");
            }
            else
            {
                command.Parameters.AddWithValue("@manager", "0");
            }
            conn.Open();
            try
            {
                command.ExecuteNonQuery();
                MessageBox.Show("пользователь успешно добавлен", "Успешно", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message.ToString(), "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

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

        private void Delete_Click(object sender, EventArgs e)
        {
            string connString = "Data Source=DESKTOP-Q8BTJMH;Initial Catalog=Testkonkurs;Integrated Security=True";
            SqlConnection conn = new SqlConnection(connString);
            SqlCommand command = new SqlCommand("DELETE FROM users WHERE login = @login", conn);
            command.Parameters.AddWithValue("@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);
            }
        }
    }
}