此方法返回文件流 如果客戶端是瀏覽器會彈出文件保存對話框讓用戶下載保存
[HttpGet]
public IActionResult DownloadPostcodeImportTemplateFile()
{
var filePath = Path.Combine("StaticFiles", "ExcelTemplate", "postCodeImportTemplate.xls");
var fileName = Path.GetFileName(filePath);
var fileStream = new FileStream(filePath, FileMode.Open);
return File(fileStream, "application/octet-stream", fileName);
}
