sqlite ve access denedim fakat tablo başlıkları geliyor ama içindeki veriler gelmiyor.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Linq;

using System.Windows.Forms;

using DevExpress.XtraEditors;

using System.Data.OleDb;

using DevExpress.XtraPrinting;

using System.Drawing.Printing;

using DevExpress.LookAndFeel;

using DevExpress.XtraBars.Navigation;

using DevExpress.XtraSplashScreen;

using System.Data.SQLite;

using DevExpress.XtraWaitForm;



namespace DepoProgramı

{

    public partial class BilgisayarKasasi : DevExpress.XtraEditors.XtraForm

    {

        //OleDbConnection conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Application.StartupPath + @"\Data.accdb");

        //OleDbCommand command;

        //OleDbDataAdapter da;

        // private BindingSource bindingSource = null;

        //private OleDbCommandBuilder oleCommandBuilder = null;

        //DataTable dataTable = new DataTable();

        //DataTable tablo = new DataTable();



        SQLiteConnection bag = new SQLiteConnection("Data Source=Data.db;Version=3;Read Only=False;");

        private SQLiteCommand command;

        SQLiteDataAdapter da;

        private BindingSource bindingSource = null;

        private SQLiteCommandBuilder oleCommandBuilder = null;

        DataTable dataTable = new DataTable();

        DataTable tablo = new DataTable();







        public BilgisayarKasasi()

        {

            InitializeComponent();

        }



        private void DataBind()

        {



            gridControl1.DataSource = null;

            dataTable.Clear();



            String queryString1 = "SELECT * FROM CihazEkleBilgisayarKasasi";



            SQLiteConnection connection = new SQLiteConnection(bag);

            connection.Open();

            SQLiteCommand command = connection.CreateCommand();

            command.CommandText = queryString1;

            try

            {



                da = new SQLiteDataAdapter(queryString1, connection);

                oleCommandBuilder = new SQLiteCommandBuilder(da);

                da.Fill(dataTable);

                bindingSource = new BindingSource { DataSource = dataTable };

                gridControl1.DataSource = bindingSource;

                gridView1.Columns[0].Visible = false;





            }

            catch (Exception ex)

            {



                MessageBox.Show(ex.ToString(), "Hata", MessageBoxButtons.OK, MessageBoxIcon.Error);

            }



        }



            private void navbarYeniEkle_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            SplashScreenManager.ShowForm(typeof(WaitForm));

            var cihazekle = new YeniCihazEkle();

            cihazekle.Show();

            Hide();

            SplashScreenManager.CloseForm();



        }



        private void btnExit_Click(object sender, EventArgs e)

        {

            if (XtraMessageBox.Show("Programı Kapatmak İstiyor musunuz ? ", "Dikkat", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)

            {



                Application.Exit();



            }

        }



        private void btnMax_Click(object sender, EventArgs e)

        {

            if (WindowState == FormWindowState.Normal)

            {





                WindowState = FormWindowState.Maximized;



            }

            else

            {

                WindowState = FormWindowState.Normal;



            }

        }



        private void btnMin_Click(object sender, EventArgs e)

        {

            WindowState = FormWindowState.Minimized;

        }



        private void navbarAnaMenu_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            var ana = new AnaMenu();

            ana.Show();

            Close();

        }



        private void BilgisayarKasasi_Load(object sender, EventArgs e)

        {

            // TODO: This line of code loads data into the 'dataDataSetKasa.CihazEkleBilgisayarKasasi' table. You can move, or remove it, as needed.

            // this.cihazEkleBilgisayarKasasiTableAdapter.Fill(this.dataDataSetKasa.CihazEkleBilgisayarKasasi);

            DataBind();



        }



        private void navbarSil_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            gridView1.DeleteRow(gridView1.FocusedRowHandle);

            cihazEkleBilgisayarKasasiTableAdapter.Update(dataDataSetKasa.CihazEkleBilgisayarKasasi);

        }



        private void navbarKaydet_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            try

            {



                Validate();

                cihazEkleBilgisayarKasasiBindingSource.EndEdit();

                cihazEkleBilgisayarKasasiTableAdapter.Update(dataDataSetKasa.CihazEkleBilgisayarKasasi);

                XtraMessageBox.Show("Kayıt Başarılı !", "Durum", MessageBoxButtons.OK, MessageBoxIcon.Information);



            }

            catch (Exception)

            {



                XtraMessageBox.Show("Kayıt işlemi Başarısız !", "Hata", MessageBoxButtons.OK, MessageBoxIcon.Error);



            }

        }



        private void navbarExcel_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            var save = new SaveFileDialog();

            if (save.ShowDialog() == DialogResult.OK)

            {

                gridView1.ExportToXlsx(save.FileName + ".xlsx");

            }

        }



        private void navbarYazdir_ElementClick(object sender, DevExpress.XtraBars.Navigation.NavElementEventArgs e)

        {

            var link = new PrintableComponentLink(new PrintingSystem());

            link.Component = gridControl1;

            link.PrintingSystem.Document.AutoFitToPagesWidth = 1;

            link.PaperKind = PaperKind.A4;

            link.Landscape = true;

            link.ShowPreview();

        }

    }

}