private void loginButton_Click(object sender, EventArgs e) { string ConnectionString = ConfigurationManager.ConnectionStrings["LogAuth"].ConnectionString; using (MySqlConnection con = new MySqlConnection(ConnectionString)) { con.Open(); using (MySqlCommand cmd = con.CreateCommand()) { cmd.CommandText = @"select count(*) from logauth where UserName=@UserName and Password=@Password"; cmd.Parameters.Add(new MySqlParameter("UserName", UsernameO.Text)); cmd.Parameters.Add(new MySqlParameter("Password", PasswordO.Text)); int i = Convert.ToInt32(cmd.ExecuteScalar()); if (i > 0) { QMSParent invf = new QMSParent(UsernameO.Text); invf.Show(); this.Hide(); QMSParent.variable1 = UsernameO.Text; } else { MessageBox.Show("UserName or Password error."); } } } }
private void exitToolStripMenuItem1_Click(object sender, EventArgs e) { this.Close(); QMSParent mp = new QMSParent(); mp.Show(); }