导入数据xlsx

 #region 导入数据
        /// <summary>
        /// 导入数据
        /// </summary>
        /// <returns></returns>
        [HttpPost]
        public async Task<IActionResult> SubmitImportDate()
        {
            try
            {
                var files = Request.Form.Files;

                //没有文件上传，直接返回
                if (files[0].Length == 0 || string.IsNullOrEmpty(files[0].FileName))
                {
                    return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：没有文件上传")).ConfigureAwait(false);
                }
                var file = files[0];
                //没有文件上传，直接返回
                if (file == null || string.IsNullOrEmpty(file.FileName) || file.Length == 0)
                {
                    return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：没有文件上传")).ConfigureAwait(false);
                }

                string FileEextension = Path.GetExtension(files[0].FileName);
                if (FileEextension != ".xls" && FileEextension != ".xlsx")
                {
                    return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：只能上传Excel文档")).ConfigureAwait(false);
                }
                //获取一个streamfile对象，该对象指向一个上传文件，准备读取该文件的内容
                Stream streamfile = file.OpenReadStream();
                byte[] bytes = null;
                using (var binaryReader = new BinaryReader(file.OpenReadStream()))
                {
                    bytes = binaryReader.ReadBytes((int)streamfile.Length);
                }

                MemoryStream stream = new MemoryStream(bytes);
                ISheet sheet;
                if (FileEextension == ".xlsx")
                {
                    XSSFWorkbook workbook = new XSSFWorkbook(stream);
                    sheet = workbook.GetSheetAt(0);
                }
                else
                {
                    HSSFWorkbook workbook = new HSSFWorkbook(stream);
                    sheet = workbook.GetSheetAt(0);
                }

                #region 模板简单验证
                //验证模板列数
                if (sheet.GetRow(0) == null || sheet.GetRow(0).Cells.Count != 6)
                {
                    return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：导入的模板错误")).ConfigureAwait(false);
                }
                //验证列名
                if (GetCellString(sheet, "0", false, 0, 0) != "11*"
                    || GetCellString(sheet, "0", false, 0, 1) != "22*"
                    || GetCellString(sheet, "0", false, 0, 2) != "33*"
                    || GetCellString(sheet, "0", false, 0, 3) != "444*"
                    || GetCellString(sheet, "0", false, 0, 4) != "55*"
                    || GetCellString(sheet, "0", false, 0, 5) != "备注"
                    )
                {
                    return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：导入的模板错误")).ConfigureAwait(false);
                }
                #endregion

                #region 数据处理

                #endregion


                return await Task.Run(() => ResultWarning("导入数据成功")).ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                return await Task.Run(() => ResultWarning($"{FrameworkMessage.MSG0000} ：导入预览数据异常，{ex.Message}")).ConfigureAwait(false);
            }

        }
        #endregion