private DataSet GetCVSFile(string pathName,string fileName)
		{
			string s = "Driver={Microsoft Text Driver (*.txt; *.csv)};DBQ=" + pathName;

			OdbcConnection conn = new OdbcConnection(s);
			OdbcCommand cmd = new OdbcCommand(@"SELECT * FROM " + fileName, conn);

			OdbcDataAdapter da = new OdbcDataAdapter(cmd);

			DataSet ds = new DataSet();
			da.Fill(ds);
 
			return ds;
		} 

		
private DataSet GetExcelWorkSheet(string pathName,string fileName,int workSheetNumber)
{  
			OleDbConnection ExcelConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+pathName+@"\"+fileName+";Extended Properties=Excel 8.0;");
			OleDbCommand ExcelCommand = new OleDbCommand();
			ExcelCommand.Connection = ExcelConnection;
			OleDbDataAdapter ExcelAdapter = new OleDbDataAdapter(ExcelCommand);

			ExcelConnection.Open();
			DataTable ExcelSheets = ExcelConnection.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,new object[] {null, null, null, "TABLE"});
			string SpreadSheetName = "["+ExcelSheets.Rows[workSheetNumber]["TABLE_NAME"].ToString()+"]";

			DataSet ExcelDataSet = new DataSet();
			ExcelCommand.CommandText = @"SELECT * FROM "+SpreadSheetName;
			ExcelAdapter.Fill(ExcelDataSet);
			
			OleDbDataReader reader = ExcelCommand.ExecuteReader();
}