Exemple #1
0
        private void buttonLogin_Click(object sender, EventArgs e)
        {
            Connect          connect   = new Connect();
            DataTable        dataTable = new DataTable();
            MySqlDataAdapter adapter   = new MySqlDataAdapter();
            MySqlCommand     command   = new MySqlCommand();

            string query = "SELECT * FROM `user` WHERE `username`=@usn AND `password`=@pass";

            command.CommandText = query;
            command.Connection  = connect.GetConnection();

            command.Parameters.Add("@usn", MySqlDbType.VarChar).Value  = textBoxUsername.Text;
            command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;

            adapter.SelectCommand = command;
            adapter.Fill(dataTable);

            //if username and password exist

            if (dataTable.Rows.Count > 0)
            {
                this.Hide();

                Main_Form main_Form = new Main_Form();
                main_Form.Show();

                //MessageBox.Show("YES");
            }
            else
            {
                if (textBoxUsername.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter your username to login", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else if (textBoxPassword.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter your password to password", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
                    MessageBox.Show("Wrong username or password", "Wrong Data", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
        private void buttonLogin_Click(object sender, EventArgs e)
        {
            CONNECT          conn    = new CONNECT();
            DataTable        table   = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand     command = new MySqlCommand();
            String           query   = "SELECT * FROM users WHERE username=@usn AND password=@pass;";

            command.Parameters.Add("@usn", MySqlDbType.VarChar).Value  = textBoxUsername.Text;
            command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;
            command.CommandText = query;
            command.Connection  = conn.getConnection();


            adapter.SelectCommand = command;
            adapter.Fill(table);

            if (table.Rows.Count > 0)
            {
                MessageBox.Show(textBoxUsername.Text.ToUpper() + " has logged in!");
                this.Hide();
                Main_Form main_Form = new Main_Form();
                main_Form.Show();
            }
            else
            {
                if (textBoxUsername.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Username", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                }
                else if (textBoxPassword.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Password", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                }
                else
                {
                    MessageBox.Show("Wrong Data", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
        private void btnLogin_Click(object sender, EventArgs e)
        {
            CONNECT          conn    = new CONNECT();
            DataTable        table   = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand     command = new MySqlCommand();
            String           query   = "SELECT * FROM `user` WHERE `username`=@usn AND `password`=@pass";

            command.CommandText = query;
            command.Connection  = conn.getConnection();

            command.Parameters.Add("@usn", MySqlDbType.VarChar).Value  = txtUsername.Text;
            command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = txtPassword.Text;

            adapter.SelectCommand = command;
            adapter.Fill(table);

            if (table.Rows.Count > 0)
            {
                this.Hide();
                Main_Form mform = new Main_Form();
                mform.Show();
            }
            else
            {
                if (txtUsername.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Your Username to Login", "Empty Username!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else if (txtPassword.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Your Password to Login", "Empty Password!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
                    MessageBox.Show("This Username or Password doesn't Exists.", "Invalid Data!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
        private void buttonLogin_Click(object sender, EventArgs e)
        {
            Connect          conn    = new Connect();
            DataTable        table   = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand     command = new MySqlCommand();
            String           query   = "SELECT * FROM hotel_db.users WHERE username =@usn AND password=@pass";

            command.CommandText = query;
            command.Connection  = conn.GetConnection();

            command.Parameters.Add("@usn", MySqlDbType.VarChar).Value  = textBoxUsername.Text;
            command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;

            adapter.SelectCommand = command;
            adapter.Fill(table);

            if (table.Rows.Count > 0)
            {
                this.Hide();
                Main_Form mform = new Main_Form();
                mform.Show();
            }
            else
            {
                if (textBoxUsername.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Your Username to Login", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else if (textBoxPassword.Text.Trim().Equals(""))
                {
                    MessageBox.Show("Enter Your Paswword to Login", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
                    MessageBox.Show("This Username or Password doesn't exists", "Wrong Data", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }