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我将 xlsx 文件中的数据放入 csv 文件中。这是我的代码：-

const file = fs.openSync('/home/rahul/example/sample.csv', 'w')
const workbook = new exceljs.Workbook();
workbook.xlsx.readFile( path.join(__dirname, '' + args.filename)).then(function() {

    const worksheet = workbook.getWorksheet('sheet3');

    worksheet.eachRow(function(row){
        try{
            const buffer = array2CsvLine(row.values)
            fs.writeSync(file, buffer, { flag: 'a' })
        }
        catch(err){
            console.log('error related to fs.writeSync function')
            console.log(err)
        }
    })
    //fs.closeSync(file)
})
fs.closeSync(file)

它给了我这个错误：-

error related to fs.writeSync function
{ Error: EBADF: bad file descriptor, write
    at Object.writeSync (fs.js:569:3)
    at /home/rahul/min-wage/xls2csv.js:73:16
    at _rows.forEach.row (/home/rahul/min-wage/node_modules/exceljs/lib/doc/worksheet.js:515:11)
    at Array.forEach (<anonymous>)
    at Worksheet.eachRow (/home/rahul/min-wage/node_modules/exceljs/lib/doc/worksheet.js:513:18)
    at /home/rahul/min-wage/xls2csv.js:70:15 errno: -9, syscall: 'write', code: 'EBADF' }

但是，如果我使用 commented fs.closeSync(file)，那么它可以正常工作。我不知道为什么会这样？我想，我也可以在全球范围内关闭文件。

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