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.OleDb;

namespace kullanici_giris

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        OleDbConnection con;

        OleDbCommand cmd;

        OleDbDataReader dr;

        private void button1_Click(object sender, EventArgs e)

        {

            string ad = textBox1.Text;

            string sifre = textBox2.Text;

            con = new OleDbConnection("Provider=Microsoft.ACE.Oledb.12.0;Data Source=giris.accdb");

            cmd = new OleDbCommand();

            con.Open();

            cmd.Connection = con;

            cmd.CommandText = "SELECT * FROM kullanici where k_ad='" + textBox1.Text + "' AND k_sifre='" + textBox2.Text + "'";

            dr = cmd.ExecuteReader();

            if(dr.Read())

            {

                Form2 f2= new Form2();

                f2.Show();

            }

            else

            {

                MessageBox.Show("Kullanıcı adı ya da şifre yanlış");

            }

            con.Close();

        }

    }

}