Dim workbook As New XSSFWorkbook()
        Dim sheet As ISheet = workbook.CreateSheet()
        Dim headerRow As IRow = sheet.CreateRow(0)
        headerRow.CreateCell(0).SetCellValue("test")
        headerRow.CreateCell(1).SetCellValue("測試中文")

        Dim workbook2 As New XSSFWorkbook()
        Dim sheet2 As ISheet = workbook2.CreateSheet()
        Dim headerRow2 As IRow = sheet2.CreateRow(0)
        headerRow2.CreateCell(0).SetCellValue("test2")
        headerRow2.CreateCell(1).SetCellValue("測試中文2")

        Dim ms As MemoryStream = New MemoryStream()
        '' leaves MemoryStream open
        workbook.Write(ms, True)
        ms.Position = 0

        Dim ms2 As MemoryStream = New MemoryStream()
        workbook2.Write(ms2, True)
        ms2.Position = 0

zip As ZipFile = New ZipFile()

            zip.AlternateEncoding = Encoding.GetEncoding("utf-8")
            zip.AlternateEncodingUsage = ZipOption.Always

            zip.AddEntry("中文檔名.xlsx", ms)
            zip.AddEntry("testfilename.xlsx", ms2)

zip.Save(Response.OutputStream)

<input id="fileUpload" type="file" name="fileUpload" accept=".pdf,.doc,.docx"/>
<input id="btnUploadFile" type="button" value="上傳" />

var data = new FormData();

var files = $('#fileUpload').get(0).files;

if (files.length > 0) {
    data.append('UploadedFile', files[0]);
}

<form action='URL' method='post' enctype='multipart/form-data' target='Uploadedfrm'>
    <input id="fileUpload" type="file" name="fileUpload" accept=".pdf,.doc,.docx"/>
    <input id="btnUploadFile" type="submit" value="上傳" />
</form>

<iframe id="Uploadedfrm" name="Uploadedfrm" style="display: none"></iframe>