komut.ExecuteNonQuery HATASI

OleDbConnection bagla = new OleDbConnection(); 
          bagla.ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0; Data Source =" + Server.MapPath("~/App_Data\\Database.mdb"); 
          bagla.Open(); 
   
          OleDbCommand komut = new OleDbCommand("insert into ogrenci(isim,soyisim) values(@isim,@soyisim)", bagla); 
   
          komut.Parameters.AddWithValue("@isim", txtAd.Text); 
          komut.Parameters.AddWithValue("@soyisim", txtSoyad.Text); 
          bagla.Close(); 
   
          komut.ExecuteNonQuery(); 
   
   
          Response.Write("<script>alert ('data eklendi')</script>"); 
  

 
  
 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 veritabanı 
 { 
     public partial class Form1 : Form 
     { 
         public Form1() 
         { 
             InitializeComponent(); 
         } 
  
         OleDbConnection baglanti = new OleDbConnection("Provider = Microsoft.ACE.OLEDB.12.0;Data Source = db.accdb"); 
         private void Form1_Load(object sender, EventArgs e) 
         { 
             DataTable tablo = new DataTable(); 
             OleDbDataAdapter adaptor = new OleDbDataAdapter("select * from personel",baglanti); 
             adaptor.Fill(tablo); 
             dataGridView1.DataSource = tablo; 
         } 
  
         private void button1_Click_1(object sender, EventArgs e) 
         { 
             baglanti.Open(); 
             MessageBox.Show("Bağlantı sağlandı"); 
         } 
  
         private void button2_Click(object sender, EventArgs e) 
         { 
             baglanti.Open(); 
             OleDbCommand komut = new OleDbCommand(); 
             komut.Connection = baglanti; 
  
             komut.CommandText = ("INSERT INTO personel (Personel_no,adi,soyadi,gorevi) VALUES (" + textBox1.Text + ",'" + textBox2.Text + "','" + textBox3.Text + "','"+ textBox4.Text +"')"); 
             komut.ExecuteNonQuery(); 
  
             DataTable tablo1 = new DataTable(); 
  
             OleDbDataAdapter adaptor = new OleDbDataAdapter("Select * from personel", baglanti); 
             adaptor.Fill(tablo1); 
             dataGridView1.DataSource = tablo1; 
  
             baglanti.Close(); 
         } 
  
         private void button3_Click(object sender, EventArgs e) 
         { 
             baglanti.Open(); 
             OleDbCommand komut = new OleDbCommand(); 
             komut.Connection = baglanti; 
  
             komut.CommandText = ("Delete * from personel where personel="+textBox5.Text+""); 
             komut.ExecuteNonQuery(); 
  
             DataTable tablo1 = new DataTable(); 
  
             OleDbDataAdapter adaptor = new OleDbDataAdapter("Select * from personel", baglanti); 
             adaptor.Fill(tablo1); 
             dataGridView1.DataSource = tablo1; 
  
             baglanti.Close(); 
         } 
  
         } 
     }