Import CSV file to my Asp.net Website

Question

i have a problem with .csv file importing to my website

public DataTable ReadDataFromCSVFormat()

        {

            ReadColumnsfromCSVfile(file,isRowOneHeader);

            CreateDataSet();

          

  return CSVData;//error comes in this place

        }

 public  DataTable ReadColumnsfromCSVfile(string file, bool isRowOneHeader)

      {

       DataTable csvDataTable = new DataTable();

    //no try/catch - add these in yourselfs or let exception happen

    //String[] csvData = File.ReadAllLines(HttpContext.Current.Server.MapPath(file));

      // String[] csvData =  Server.MapPath(this.UploadFolderPath) + FileUploadctrl.FileName;

       String[] csvData = File.ReadAllLines(HttpContext.Current.Server.MapPath(this.UploadFolderPath) + FileUploadctrl.FileName);

    //if no data in file 'manually' throw an exception

    if (csvData.Length == 0)

    {

        throw new Exception("CSV File Appears to be Empty");

    }

    String[] headings = csvData[0].Split(',');

    int index = 0; //will be zero or one depending on isRowOneHeader

    if (isRowOneHeader) //if first record lists headers

    {

        index = 1; //so we won't take headings as data

        //for each heading

        for (int i = 0; i < headings.Length; i++)

        {

            //replace spaces with underscores for column names

            headings[i] = headings[i].Replace(" ", "_");

            //add a column for each heading

            csvDataTable.Columns.Add(headings[i], typeof (string));

        }

    }

    else //if no headers just go for col1, col2 etc.

    {

        for (int i = 0; i < headings.Length; i++)

        {

            //create arbitary column names

            csvDataTable.Columns.Add("col" + (i + 1).ToString(), typeof (string));

        }

    }

    //populate the DataTable

    for (int i = index; i < csvData.Length; i++)

    {

        //create new rows

        DataRow row = csvDataTable.NewRow();

        for (int j = 0; j < headings.Length; j++)

        {

            //fill them

            row[j] = csvData[i].Split(',')[j];

        }

        //add rows to over DataTable

        csvDataTable.Rows.Add(row);

    }

        //return the CSV DataTable

       return csvDataTable;

     }
 please check it......