using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using NPOI.SS.UserModel;

/// <summary>
/// 操作ExcelFile的简单方法
/// xuwei add 2024-01-05 
/// </summary>
public class ExcelFile
{
    public IWorkbook GetWorkbook;

    public ExcelFile()
    {

    }

    public ExcelFile(string fileName)
    {
        Open(fileName);
    }

    //打开excel
    public void Open(string fileName)
    {
        FileStream fs = File.Open(HttpContext.Current.Server.MapPath(fileName), FileMode.Open, FileAccess.Read);
        GetWorkbook = WorkbookFactory.Create(fs);
        fs.Close();
    }

    //保存excel
    public void SaveAs(string fileName)
    {
        MemoryStream ms = new MemoryStream();
        GetWorkbook.Write(ms);
        FileStream nfs = new FileStream(HttpContext.Current.Server.MapPath(fileName), FileMode.Create, FileAccess.Write);
        nfs.Write(ms.ToArray(), 0, ms.ToArray().Length);
        nfs.Flush();
        nfs.Close();
        ms.Close();
    }

}