c_kon/KokursTest2/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 KokursTest2
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            String connstring = "Data Source=DESKTOP-Q8BTJMH;Initial Catalog=konkurs;Integrated Security=True";
            SqlConnection conn = new SqlConnection(connstring);
            conn.Open();
            SqlCommand command = new SqlCommand("Insert INTO users  (login,password,admin,manager)VALUES(@login,@password,@admin,@manager)", conn);
            command.Parameters.Add("@login", textBox1.Text);
            command.Parameters.Add("@password", textBox2.Text);
            
   
            if (radioButton1.Checked)
            {
                command.Parameters.Add("@admin", "1");
            }
            else
            {
                command.Parameters.Add("@admin", "0");
            }
            if (radioButton2.Checked)
            {
                command.Parameters.Add("@manager", "1");
            }
            else
            {
                command.Parameters.Add("@manager", "0");
            }

            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);
            }
            finally
            {

            }
          
        }

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

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox1_Enter(object sender, EventArgs e)
        {
            if (textBox1.Text == "Введите логин")
            {
                textBox1.Text = "";
            }
        }

        private void textBox1_Leave(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                textBox1.Text = "Введите логин";
            }
        }

        private void textBox2_Enter(object sender, EventArgs e)
        {
            if (textBox2.Text == "Введите пароль")
            {
                textBox2.Text = "";
            }
        }

        private void textBox2_Leave(object sender, EventArgs e)
        {
            if (textBox2.Text == "")
            {
                textBox2.Text = "Введите пароль";
            }
        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            String connstring = "Data Source=DESKTOP-Q8BTJMH;Initial Catalog=konkurs;Integrated Security=True";
            SqlConnection conn = new SqlConnection(connstring);
            conn.Open();
            SqlCommand command = new SqlCommand("DELETE FROM users WHERE login = @login", conn);
            command.Parameters.Add("@login", textBox3.Text);
            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
            {

            }

        }
    }
}