Conditional import of a csv file

public DataSet ConnectCSV(string filetable)
		{
			DataSet ds = new DataSet();
			try
			{		
				// You can get connected to driver either by using DSN or connection string
 
				// Create a connection string as below, if you want to use DSN less connection. The DBQ attribute sets the path of directory which contains CSV files
				string strConnString="Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq="+txtCSVFolderPath.Text.Trim()+";Extensions=asc,csv,tab,txt;Persist Security Info=False";
				string sql_select;								
				System.Data.Odbc.OdbcConnection conn;		
		
				//Create connection to CSV file
				conn	=	new System.Data.Odbc.OdbcConnection(strConnString.Trim());
 
				// For creating a connection using DSN, use following line
				//conn	=	new System.Data.Odbc.OdbcConnection(DSN="MyDSN");
				
				//Open the connection 
				conn.Open();
				//Fetch records from CSV
				sql_select		=	"select * from ["+ filetable +"]";
				
				obj_oledb_da	=	new System.Data.Odbc.OdbcDataAdapter(sql_select,conn);
				//Fill dataset with the records from CSV file
				obj_oledb_da.Fill(ds,"Stocks");
				
				//Set the datagrid properties
				
				dGridCSVdata.DataSource=ds;
				dGridCSVdata.DataMember="Stocks";
				//Close Connection to CSV file
				conn.Close();				
			}
			catch(Exception e) //Error
			{
				MessageBox.Show(e.Message);
			}
			return ds;
		}
 
		# endregion