convert xls to xlsx without excel

Aspose.cells. dll download Http://pan.baidu.com/s/1slRENLF and referenceC # code1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.ComponentModel;4 usingSystem.Data;5 usingSystem.Drawing;6 usingSystem.Linq;7 usingSystem.Text;8 usingSystem.Windows.Forms;9 usingAspose.cells;Ten One namespaceexceltopdf A { - Public Partial classForm1:form - { the PublicForm1 () - { - InitializeComponent (); - } + - Private voidButton1_Click (Objectsender, Event

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/// ///open an Excel document and convert to a DataTable/// /// Public StaticDataTable Excelworksheettodatatable () {DataTable dtexecl=NewDataTable (); DoubleVer =Getexcelver (); if(Ver 0) {MessageBox.Show ("The computer does not has Excel installed.","prompt"); return NULL; } stringExcelfile =""; OpenFileDialog OFD=NewOpenFile

;ImportJava.util.logging.Logger;Importjavax.xml.parsers.ParserConfigurationException;Importjavax.xml.transform.TransformerException;/** To change the license header, choose License Headers in the Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. *//** * * @authory*/ Public classTest {/** * @paramargs the command line arguments*/ Public Static voidMain (string[] args) {Try{poiutil.exceltohtml ("T2.