datagridview ve sql ile ilgili yardım!!!

        private void dataGridView1_DoubleClick(object sender, EventArgs e) 
          { 
              DataClasses1DataContext dc = new DataClasses1DataContext(); 
              DataGridViewRow row = dataGridView1.CurrentRow; 
   
              var sorgu = (from p in dc.ARACs where p.plaka == row.Cells["plakaDataGridViewTextBoxColumn"].Value.ToString() select p).Single(); 
   
              frmaracEkle ekle = new frmaracEkle(); 
               
              ekle.txtMarka.Text          = dataGridView1.CurrentRow.Cells["markaDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtModel.Text          = dataGridView1.CurrentRow.Cells["modelDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpYil.Text            = dataGridView1.CurrentRow.Cells["yilDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtKasaTipi.Text       = dataGridView1.CurrentRow.Cells["kasaTipiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtRenk.Text           = dataGridView1.CurrentRow.Cells["renkDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtSilindirHacmi.Text  = dataGridView1.CurrentRow.Cells["silindirHacmiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtMotorGucu.Text      = dataGridView1.CurrentRow.Cells["motorGucuDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtGunlukUcret.Text    = dataGridView1.CurrentRow.Cells["gunlukUcretDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpSigortaBT.Text      = dataGridView1.CurrentRow.Cells["sigortaBitisTarihiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpMuayeneBT.Text      = dataGridView1.CurrentRow.Cells["muayeneBitisTarihiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpKaskoBT.Text        = dataGridView1.CurrentRow.Cells["kaskoBitisTarihiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpEmisyonBT.Text      = dataGridView1.CurrentRow.Cells["emisyonBitisTarihiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.dtpizinBT.Text         = dataGridView1.CurrentRow.Cells["izinBitisTarihiDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.txtPlaka.Text          = dataGridView1.CurrentRow.Cells["plakaDataGridViewTextBoxColumn"].Value.ToString(); 
              ekle.cbYakit.Text           = dataGridView1.CurrentRow.Cells["yakitTuruDataGridViewTextBoxColumn"].Value.ToString(); 
   
             
              ekle.ShowDialog();