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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
void listele()
{
OleDbCommand komut = new OleDbCommand("SELECT * FROM KAYITLAR", bag);
bag.Open();
OleDbDataReader adp = komut.ExecuteReader();
DataTable tablo = new DataTable();
tablo.Clear();
tablo.Load(adp);
adp.Close(); bag.Close();
dataGridView1.DataSource = tablo;
}
OleDbConnection bag=new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0; Data Source=vt.accdb");

private void Form1_Load(object sender, EventArgs e)
{
listele();
}

private void button1_Click_1(object sender, EventArgs e)
{
string adres = textBox1.Text == "" ? "%" : textBox1.Text;
OleDbCommand komut = new OleDbCommand("SELECT * FROM KAYITLAR WHERE ADRES LIKE '"+adres+"'", bag);
bag.Open();
OleDbDataReader adp = komut.ExecuteReader();
DataTable tablo = new DataTable();
tablo.Clear();
tablo.Load(adp);
adp.Close(); bag.Close();
dataGridView1.DataSource = tablo;
}
}
}



// Notepad ++

24.11.2022 Nesne Tabanlı Programlama II

Axess, SQLServer, MySQL kullanacağız.

C# Connection Strings

SQL Veritabanlarının ortak sorgulama dilidir.

I.ExecuteScalar -Select sorgusu için, Tek değişken
II.ExecuteReader -Select sorgusu için, Birden fazla değişken
III.ExecuteNonquery -Ekleme, Silme, Güncelleme için

DataReaderNesnesi = Adaptör nesnesi (transfer için kullanılır)

1-Kütüphane dosyalarını yaz
2-Bağlantı nesnesini oluştur
3-Komut nesnesini oluştur
4-Bağlantıyı aç
5-Adapter ile kayıtları oku
6-Bağlantıyı kapat

C:UsersÖğrenciDesktopprojeWindowsFormsApp1WindowsFormsApp1binDebug // içine Access vt oluşturdum.
     
 
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