Export data from OpenOffice to DataTable/Dataset

Please Add Reference of Microsoft.Office.Interop.Excel from references...

using System.Data.OleDb;
using excel = Microsoft.Office.Interop.Excel;
using System.IO;

//////////for opening excel file
OpenFileDialog o = new OpenFileDialog();
            o.Filter = "|*.xls";
            o.Filter = "Excel files |*.xls";
            o.Title = "select your Excel attachment ";
            if (o.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                txtFilePath.Text = o.FileName;
            }
            str=Path.GetFileName(txtFilePath.Text.ToString());
            txtFilePath.Text = str;

/////////////uploading excel file in Datatable
excel._Application ae = new excel.Application();
                excel.Workbook we = ae.Workbooks.Open(txtFilePath.Text);
                excel.Worksheet ws = ae.Worksheets.get_Item(1);
                excel.Range re = ws.UsedRange;
                DataTable dt = new DataTable();
                dt.Columns.Add("Taluka");//adding column to datatable similar to excel sheet
                dt.Columns.Add("Place");
                for (row = 2; row <= re.Rows.Count; row++)
                {
                    DataRow dr = dt.NewRow();
                    for (column = 1; column <= re.Columns.Count; column++)
                    {
                        dr[column - 1] = (re.Cells[row, column] as Microsoft.Office.Interop.Excel.Range).Value2.ToString();
                    }
                    dt.Rows.Add(dr);
                }              
                we.Close();
                ae.Quit();