using MySql.Data.MySqlClient;
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;
namespace WindowsFormsApp3
{
public partial class Form1: Form
{
MySqlConnection conn = new MySqlConnection(@"Data Source = localhost;port=3306;Initial Catalog=loginandregister; User Id=root;password=''");
public Form1()
{
InitializeComponent();
}
bool _regiter()
{
int retval = 0;
try
{
string SQLS = string.Empty;
SQLS += "INSERT tb_user SET ";
SQLS += "fullname='" + textBox1.Text + "'";
SQLS += ",user='" + textBox2.Text + "'";
SQLS += ",password='" + textBox3.Text + "'";
conn.Open();
using (MySqlCommand com = new MySqlCommand(SQLS, conn))
{
retval = com.ExecuteNonQuery();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally { conn.Close(); }
return retval > 0;
}
private void button1_Click(object sender, EventArgs e)
{
_regiter();
MessageBox.Show("Register Success");
Form2 oRegisterrr = new Form2();
oRegisterrr.ShowDialog();
this.Close();
}
}
}
using MySql.Data.MySqlClient;
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;
namespace WindowsFormsApp3
{
public partial class Form2 : Form
{
MySqlConnection conn = new MySqlConnection(@"Data Source = localhost;port=3306;Initial Catalog=loginandregister; User Id=root;password=''");
public Form2()
{
InitializeComponent();
}
private void LoginProcess()
{
if (login(textBox1.Text, textBox2.Text))
{
MessageBox.Show("Welcome " + textBox1.Text);
this.Hide();
//Form_Menu oFormMenu = new Form_Menu();
// oFormMenu.ShowDialog();
this.Close();
}
else
{
MessageBox.Show("Login Fail");
}
}
private Boolean login(string sUsername, string sPassword)
{
string SQL = "SELECT user,password FROM tb_user";
conn.Open();
MySqlCommand cmd = new MySqlCommand(SQL, conn);
MySqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
if ((sUsername == reader.GetString(0)) && (sPassword == reader.GetString(1)))
{
conn.Close();
return true;
}
}
conn.Close();
return false;
}
private void button1_Click(object sender, EventArgs e)
{
LoginProcess();
}
}
}