private void btnNcf_Click(object sender, EventArgs e) { OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.Filter = "ncf Files(*.ncf)|*.ncf|All Files (*.*)|*.*"; openFileDialog1.InitialDirectory = string.Format("{0}\\{1}", System.Environment.CurrentDirectory, "NCFData"); DialogResult res = openFileDialog1.ShowDialog(this); if (res == DialogResult.OK) { try { string fileName = openFileDialog1.FileName; dbOp = DBOperate.CreateDBOperator(fileName); if (dbOp.Connect(false)) { ReadSampleConfig(); } if (dbOp != null && dbOp.IsOpen) { dbOp.Close(false); } } catch (Exception ex) { LogHelper.GetLogger <SimulatorForm>().Error(ex.Message); LogHelper.GetLogger <SimulatorForm>().Error(ex.StackTrace); } } }