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Список использованных источников ⇐ ПредыдущаяСтр 6 из 6
1. Стиллмен Э., Грин Д. Изучаем C# / Э. Стиллмен, Д. Грин – Head First O’Reilly: Питер, 2014. – 816 с. 2. Дюбуа П. MySQL / П. Дюбуа – Вильямс, 2007. – 1168 с. 3. Петцольд Ч. Программирование для Microsoft Windows 8. Разработка приложений для Windows Store на C# и XAML – Питер, 2014. – 1008 с. 4. Актуальность компьютерного сервиса в современном мире – URL: http://www.allpchelp.ru/poleznoe/service/ (дата обращения 2020-10-05). 5. MySQL. Модель клиент-сервер – URL: https://www.hostinger.ru/rukovodstva/shto-takoje-mysql/ (дата обращения 2020-10-06). 6. MySQL Workbench – URL: https://ru.wikipedia.org/wiki/MySQL_Workbench (дата обращения 2020-10-07). 7. Microsoft Visual Studio – URL: https://ru.wikipedia.org/wiki/Microsoft_Visual_Studio (дата обращения 2020-10-08). 8. C Sharp – URL: https://ru.wikipedia.org/wiki/C_Sharp (дата обращения 2020-10-09). 9. Система защиты баз данных – URL: https://www.anti-malware.ru/security/database-firewall (дата обращения 2020-10-10). 10. Параметризированные запросы к БД – URL: https://scask.ru/a_book_cbd.php?id=33 (дата обращения 2020-10-11). 11. Хранимая процедура – URL: https://ru.wikipedia.org/wiki/Хранимая_процедура (дата обращения 2020-10-12).
ПРИЛОЖЕНИЕ А Таблицы с исходными данными
Рисунок 14 – Таблица computer_components
Рисунок 15 – Таблица customers
Рисунок 16 – Таблица employees
Рисунок 17 – Таблица employment
Рисунок 18 – Таблица orders
Рисунок 19 – Таблица orders_and_computer_components
Рисунок 20 – Таблица orders_and_services
Рисунок 21 – Таблица services
Рисунок 22 – Таблица types_of_computer_components
Рисунок 23 – Таблица users
ПРИЛОЖЕНИЕ Б Листинг триггеров и хранимых процедур Листинг хранимой процедуры «show_employees». CREATE DEFINER=`root`@`localhost` PROCEDURE `show_employees`() BEGIN SELECT * FROM employees; END
Листинг хранимой процедуры «add_employee». CREATE DEFINER=`root`@`localhost` PROCEDURE `add_employee`( IN Employee_Full_Name varchar(100), IN Date_of_Birth datetime, IN Gender enum('male', 'female'), IN Address varchar(45), IN Employee_Phone_Number varchar(45), IN Passport varchar(45), IN ID_Employment int) BEGIN INSERT INTO employees( Employee_Full_Name, Date_of_Birth, Gender, Address, Employee_Phone_Number, Passport, ID_Employment) values( Employee_Full_Name, Date_of_Birth, Gender, Address, Employee_Phone_Number, Passport, ID_Employment); END
ПРИЛОЖЕНИЕ В Листинг приложения Листинг модуля Form 1. static string str = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection con = new MySqlConnection(str);
MySqlCommand cmd = new MySqlCommand(); //DataSet ds = new DataSet(); private void button1_Click(object sender, EventArgs e) { try { string Login = textBox1.Text; string Password = textBox2.Text;
if (Login == "" || Password == "") { MessageBox.Show("Поля не заполнены"); } if (Login.Length < 3 || Password.Length < 3) { MessageBox.Show("Минимальная длина поля 3 символа"); } { MySqlConnection con = new MySqlConnection(str); using (MySqlCommand cmd = new MySqlCommand("SELECT User_ID, User_Password, User_Guid FROM users WHERE User_Login=@Login;", con)) { cmd.Parameters.AddWithValue("@Login", Login); con.Open();
MySqlDataReader dr = cmd.ExecuteReader();
while (dr.Read()) { // dr.Read() = we found user(s) with matching login int db_User_ID = Convert.ToInt32(dr["User_ID"]); string db_Password = Convert.ToString(dr["User_Password"]); string db_User_Guid = Convert.ToString(dr["User_Guid"]); // Now we hash the UserGuid from the database with the password we want to check string hashedPassword = Security.HashSHA1(Password + db_User_Guid); // If its correct password the result of the hash is the same as in the database if (db_Password!= hashedPassword) { Form3 form3 = new Form3(); form3.Show(); this.Hide(); } else { Form5 form5 = new Form5(); form5.Show(); this.Hide(); } } con.Close(); } } } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } public class Security { public static string HashSHA1(string value) { var sha1 = System.Security.Cryptography.SHA1.Create(); var inputBytes = Encoding.ASCII.GetBytes(value); var hash = sha1.ComputeHash(inputBytes);
var sb = new StringBuilder(); for (var i = 0; i < hash.Length; i++) { sb.Append(hash[i].ToString("X2"));
} return sb.ToString(); } } private void button2_Click(object sender, EventArgs e) { Form4 form4 = new Form4(); form4.Show(); this.Hide(); } }
Листинг модуля Form2. private void button1_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "SELECT * FROM computer_components;"; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button2_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; dataGridView1.Rows.Clear(); dataGridView1.Refresh(); } private void button3_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "SELECT ID_Type_of_Computer_Component, Manufacturer_Country, Price FROM computer_components WHERE Price in (SELECT max(Price) WHERE Manufacturer_Country = 'Тайвань' and ID_Type_of_Computer_Component = '1100'); "; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button4_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select * from orders where Order_ID IN(select Computer_Component_ID from computer_components where Warranty_Period = '24'); "; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button6_Click(object sender, EventArgs e) { Form1 form1 = new Form1(); form1.Show(); this.Hide(); } private void button5_Click(object sender, EventArgs e) { Form5 form5 = new Form5(); form5.Show(); this.Hide(); }
Листинг модуля Form3. public partial class Form3: Form { public Form3() { InitializeComponent(); } private void Form3_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { Form1 form1 = new Form1(); form1.Show(); this.Hide(); } private void button2_Click(object sender, EventArgs e) { Form4 form4 = new Form4(); form4.Show(); this.Hide(); } }
Листинг модуля Form4. static string str = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection con = new MySqlConnection(str); MySqlCommand cmd; DataSet ds = new DataSet();
private void button1_Click(object sender, EventArgs e) { try { string Login = textBox1.Text; string Password = textBox2.Text; string Password_Repeated = textBox3.Text;
// First create a new Guid (Global Unique ID) for the user. This will be unique for each user Guid user_Guid = System.Guid.NewGuid();
// Hash the password together with the unique userGuid string hashedPassword = Security.HashSHA1(Password + user_Guid.ToString());
if (Password == Password_Repeated) { cmd = new MySqlCommand("SELECT * FROM Users WHERE User_Login=@Login", con); MySqlDataAdapter da = new MySqlDataAdapter(cmd); cmd.Parameters.AddWithValue("@Login", Login); da.Fill(ds);
int i = ds.Tables[0].Rows.Count; if (i > 0) { MessageBox.Show("Пользователь " + Login + " уже существует"); ds.Clear(); } } if (Login == "" || Password == "" || Password_Repeated == "") { MessageBox.Show("Поля не заполнены"); } else { cmd = new MySqlCommand("INSERT INTO users(User_Login, User_Password, User_Guid) VALUES(@Login, @Password, @user_Guid)", con); cmd.Parameters.AddWithValue("@Login", Login); cmd.Parameters.AddWithValue("@Password", hashedPassword); cmd.Parameters.AddWithValue("@User_Guid", user_Guid); con.Open(); cmd.ExecuteNonQuery(); con.Close();
this.Hide(); Form1 form1 = new Form1(); form1.Show(); } } catch (Exception ex) { MessageBox.Show(ex.Message); } } public class Security { public static string HashSHA1(string value) { var sha1 = System.Security.Cryptography.SHA1.Create(); var inputBytes = Encoding.ASCII.GetBytes(value); var hash = sha1.ComputeHash(inputBytes);
var sb = new StringBuilder(); for (var i = 0; i < hash.Length; i++) { sb.Append(hash[i].ToString("X2")); } return sb.ToString(); } }
Листинг модуля Form5. private void button4_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select * from customers order by rand() limit 1; "; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button5_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select avg(Salary) as 'Среднемесячная', avg(12 * Salary) as 'Среднегодовая' from employment; "; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button1_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; dataGridView1.Rows.Clear();
dataGridView1.Refresh(); } private void button2_Click(object sender, EventArgs e) { Form2 form2 = new Form2(); form2.Show(); this.Hide(); } private void button3_Click(object sender, EventArgs e) { Form6 form6 = new Form6(); form6.Show(); this.Hide(); } }
Листинг модуля Form6. private void button4_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select concat_ws(',', Employee_Full_Name, Address, Gender) as 'Address', substring_index(Employee_Full_Name, ' ', 1) as 'Last Name' from employees where Gender = 'male';"; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button5_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select concat_ws(' ', Manufacturer_Company, Brand) as 'Комплектующие' from computer_components;"; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button2_Click(object sender, EventArgs e) { Form5 form5 = new Form5(); form5.Show(); this.Hide(); } private void button3_Click(object sender, EventArgs e) { Form7 form7 = new Form7(); form7.Show(); this.Hide(); } private void button1_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; dataGridView1.Rows.Clear(); dataGridView1.Refresh(); } }
Листинг модуля Form7. private void button2_Click(object sender, EventArgs e) { Form6 form6 = new Form6(); form6.Show(); this.Hide(); } private void button3_Click(object sender, EventArgs e) { Form8 form8 = new Form8(); form8.Show(); this.Hide(); } private void button1_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; dataGridView1.Rows.Clear(); dataGridView1.Refresh(); } private void button4_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select DATE_FORMAT(Date_of_Birth, '%d.%m.%Y') as 'Дата рождения' from employees;"; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button5_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select dayname(Order_Datе) as 'День заказа' from orders where Order_ID = '2'; "; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close();
} catch (Exception ex) { MessageBox.Show(ex.ToString()); } }
Листинг модуля Form8. private void button5_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "select * from employees;"; MySqlDataAdapter adapter = new MySqlDataAdapter(query, connection); DataSet ds = new DataSet(); adapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } private void button3_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; dataGridView1.Rows.Clear(); dataGridView1.Refresh(); }
private void Form8_Load(object sender, EventArgs e) { } private void radioButton1_CheckedChanged(object sender, EventArgs e) { gender = "male"; } private void radioButton2_CheckedChanged(object sender, EventArgs e) { gender = "female"; } private void radioButton3_CheckedChanged(object sender, EventArgs e) { employmentID = "100"; } private void radioButton4_CheckedChanged(object sender, EventArgs e) { employmentID = "200"; } private void radioButton5_CheckedChanged(object sender, EventArgs e) { employmentID = "300"; } private void button4_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306";
MySqlConnection connection = new MySqlConnection(conn); try { string Full_Name = textBox1.Text; string BirthDay = maskedTextBox1.Text; string address = textBox4.Text; string Phone_Number = maskedTextBox2.Text; string passport = textBox6.Text; connection.Open(); MySqlCommand cmd = new MySqlCommand("add_employee", connection); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("?Employee_Full_Name", Full_Name); cmd.Parameters.AddWithValue("?Date_of_Birth", BirthDay); cmd.Parameters.AddWithValue("?Gender", gender); cmd.Parameters.AddWithValue("?Address", address); cmd.Parameters.AddWithValue("?Employee_Phone_Number", Phone_Number); cmd.Parameters.AddWithValue("?Passport", passport); cmd.Parameters.AddWithValue("?ID_Employment", employmentID);
if(cmd.ExecuteNonQuery() == 1) { MessageBox.Show("Добавление прошло успешно"); } else { MessageBox.Show("Ошибка при добавлении"); } connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }
Листинг модуля Form9. private void button5_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "insert into computer_components(ID_Type_of_Computer_Component, Brand, Manufacturer_Company, Manufacturer_Country, Release_Date, Specifications, Warranty_Period, Computer_Component_Description, Price) " + "values(@ID_Type_of_Computer_Component, @Brand, @Manufacturer_Company, @Manufacturer_Country, @Release_Date, @Specifications, @Warranty_Period, @Computer_Component_Description, @Price); "; MySqlCommand cmd = new MySqlCommand(query, connection); cmd.Parameters.AddWithValue("@ID_Type_of_Computer_Component", ComponentType); cmd.Parameters.AddWithValue("@Brand", textBox1.Text); cmd.Parameters.AddWithValue("@Manufacturer_Company", textBox2.Text); cmd.Parameters.AddWithValue("@Manufacturer_Country", textBox3.Text); cmd.Parameters.AddWithValue("@Release_Date", maskedTextBox1.Text); cmd.Parameters.AddWithValue("@Specifications", textBox4.Text); cmd.Parameters.AddWithValue("@Warranty_Period", Warranty); cmd.Parameters.AddWithValue("@Computer_Component_Description", textBox5.Text); cmd.Parameters.AddWithValue("@Price", textBox6.Text);
cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); textBox1.Clear(); textBox2.Clear(); textBox3.Clear(); textBox4.Clear(); textBox5.Clear(); textBox6.Clear(); maskedTextBox1.Clear(); MessageBox.Show("Добавление прошло успешно");
connection.Close();
} catch (Exception ex) { MessageBox.Show(ex.ToString()); } }
Листинг модуля Form10. private void button1_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); string query = "update employment set Salary='"+textBox2.Text+"'where ID_Employment='"+employment+"'"; MySqlCommand cmd = new MySqlCommand(query, connection); cmd.Parameters.AddWithValue("@Salary", textBox2.Text); cmd.Parameters.AddWithValue("@ID_Employment", employment); cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); textBox2.Clear(); textBox3.Clear(); textBox4.Clear(); MessageBox.Show("Изменение прошло успешно"); connection.Close(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }
Листинг модуля Form11. private void button3_Click(object sender, EventArgs e) { string conn = "server=127.0.0.1;user=root;password=Plazma942427;database=computer_company;port=3306"; MySqlConnection connection = new MySqlConnection(conn); try { connection.Open(); // Delete a record string DeleteQuery = "DELETE FROM employees WHERE Employee_Full_Name='" + comboBox1.Text + "'"; MySqlCommand cmd = new MySqlCommand(DeleteQuery, connection); cmd.Parameters.AddWithValue("@Employee_Full_Name", comboBox1.Text); cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); MessageBox.Show("Удаление прошло успешно"); comboBox1.SelectedIndex = -1; comboBox1.Items.Clear(); // Select a record after deleting string SelectQuery = "SELECT * FROM computer_company.employees"; MySqlCommand mySqlCommand = new MySqlCommand(SelectQuery, connection); MySqlDataReader reader = mySqlCommand.ExecuteReader(); while (reader.Read()) { comboBox1.Items.Add(reader.GetString("Employee_Full_Name")); } connection.Close(); reader.Close();
} catch (Exception ex) { MessageBox.Show(ex.ToString()); } }
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