I want to add a condition: dgvrow.Cells["CibtcaNO"].Value.ToString() != "". How? Please help me.
  
private void btnAdjusted_Click(object sender, EventArgs e)
        {
con = new OleDbConnection(conString);
if (comboBoxEnterSuspenseAccount.Text != "")  
                    {
                        var query = "SELECT * FROM LalData " +
                    " WHERE " +
                    "SuspenseAccount = @suspenceAccount1 " +
                    "AND " +
                    "(PaymentDate BETWEEN @firstDate AND @lastDate)";
con.Open();
                        OleDbCommand cmd = new OleDbCommand(query, con);
                        cmd.Parameters.AddWithValue("@suspenceAccount1 ", DbType.String).Value = comboBoxEnterSuspenseAccount.Text.ToString();
                        cmd.Parameters.AddWithValue("@firstDate ", DbType.Date).Value =
            dtpFirstDate.Value.ToShortDateString();
                        cmd.Parameters.AddWithValue("@lastDate ", DbType.Date).Value =
                        dtpLastDate.Value.ToShortDateString();
adapter = new OleDbDataAdapter(cmd);
                        adapter.Fill(dt);
                        dataGridView1.DataSource = dt;
                        dataGridView1.CurrentCell = dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[0];
                        con.Close();
                    }
                      
            }