Read CSV file using C#

Lasantha PW
14y
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I'm going to explain how extract data from csv file using c#. First you have to declare two string variables and their properties for store directory 
and filename of csv file which you want to extract data.

        private string dirCSV;

private string fileNevCSV;

        public string FileNevCSV
        {
            get { return fileNevCSV; }
            set { fileNevCSV = value; }
        }

        public string dirCSV
        {
            get { return dirCSV; }
            set { dirCSV = value; }
        }

In the second step connect to the data source and fill it to the dataset.

        public DataSet loadCVS(int noofrows)
        {
            DataSet ds = new DataSet();
            try
            {
                // Creates and opens an ODBC connection
                string strConnString = "Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=" + this.dirCSV.Trim() +
";Extensions=asc,csv,tab,txt;Persist Security Info=False";
                string sql_select;
                OdbcConnection conn;
                conn = new OdbcConnection(strConnString.Trim());
                conn.Open();

                //Creates the select command text
                if (noofrows == -1)
                {
                    sql_select = "select * from [" + this.FileNevCSV.Trim() + "]";
                }
                else
                {
                    sql_select = "select top " + noofrows + " * from [" + this.FileNevCSV.Trim() + "]";
                }

                //Creates the data adapter
                OdbcDataAdapter obj_oledb_da = new OdbcDataAdapter(sql_select, conn);

                //Fills dataset with the records from CSV file
                obj_oledb_da.Fill(ds, "csv");

                //closes the connection
                conn.Close();
            }

catch (Exception e) //Error

{

}

return ds;
}

In the third step extract data to DataTable from generated DataSet.

this.dirCSV = "file path";

this.fileNevCSV ="file name";

DataSet ds = loadCVS(-1);

DataTable table = ds.Tables[0];

foreach (DataRow row in table.Rows)
{

//iterate through the DataTable.

}

Thanks.

Happy coding...