C# MSSQL Bağlantısı, Sorgulama, Kayıt Girişi, Kayıt Silme Videosu

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace veritabaniislemleri
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        SqlConnection baglanti = new SqlConnection();
        DataTable tablo = new DataTable();
        SqlDataAdapter adaptor = new SqlDataAdapter();
        SqlCommand komut = new SqlCommand();
        string baglantiParametresi = "Data Source=OZCAN;Initial Catalog=test;User ID=test;Password=123;";

        private void button1_Click(object sender, EventArgs e)
        {
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            MessageBox.Show("Bağlantı Sağlandı");
            baglanti.Close();
            MessageBox.Show("Balantı Kesildi");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            tablo.Clear();
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            komut.Connection = baglanti;
            string SQL = "select * from musteri";
            komut.CommandText = SQL;
            adaptor.SelectCommand = komut;
            adaptor.Fill(tablo);
            dataGridView1.DataSource = tablo;
            baglanti.Close();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            tablo.Clear();
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            komut.Connection = baglanti;
            string SQL = "select * from musteri order by no desc";
            komut.CommandText = SQL;
            adaptor.SelectCommand = komut;
            adaptor.Fill(tablo);
            dataGridView1.DataSource = tablo;
            baglanti.Close();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            tablo.Clear();
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            komut.Connection = baglanti;
            string SQL = "select * from musteri where no="+textBox1.Text;
            komut.CommandText = SQL;
            adaptor.SelectCommand = komut;
            adaptor.Fill(tablo);
            dataGridView1.DataSource = tablo;
            baglanti.Close();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            tablo.Clear();
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            komut.Connection = baglanti;
            string SQL = "insert into musteri (no,isim,soyisim) values ("+textBox2.Text+",'"+textBox3.Text+"','"+textBox4.Text+"')";
            komut.CommandText = SQL;
            komut.ExecuteNonQuery();
            baglanti.Close();

            button2_Click(sender,new EventArgs());
        }

        private void button6_Click(object sender, EventArgs e)
        {
            tablo.Clear();
            baglanti.ConnectionString = baglantiParametresi;
            baglanti.Open();
            komut.Connection = baglanti;
            string SQL = "delete from musteri where no="+textBox5.Text;
            komut.CommandText = SQL;
            komut.ExecuteNonQuery();
            baglanti.Close();

            button2_Click(sender, new EventArgs());
        }
    }
}