.net core 导入excel

1使用NPOI

2代码使用

[HttpPost]
        public IActionResult KS_Import(IFormFile file)
        {
            try
            {
                var stream = file.OpenReadStream();//获取文件内容
                var fileType = Path.GetExtension(file.FileName);//获取文件后缀 带.
                DataTable dt = new DataTable();
                ISheet sheet = null;
                IWorkbook workbook = null;

                #region 判断excel版本
                //2007以上版本excel
                if (fileType == ".xlsx")
                {
                    workbook = new XSSFWorkbook(stream);
                }
                //2007以下版本excel
                else if (fileType == ".xls")
                {
                    workbook = new HSSFWorkbook(stream);
                }
                else
                {
                    throw new Exception("传入的不是Excel文件！");
                }
                #endregion
                sheet = workbook.GetSheetAt(0);//取第1个工作表
                if (sheet != null)
                {
                    IRow firstRow = sheet.GetRow(0);//首行
                    int cellCount = firstRow.LastCellNum;//列总数
                    for (int i = firstRow.FirstCellNum; i < cellCount; i++)
                    {
                        ICell cell = firstRow.GetCell(i);
                        if (cell != null)
                        {
                            string cellValue = cell.StringCellValue.Trim();
                            if (!string.IsNullOrEmpty(cellValue))
                            {
                                DataColumn dataColumn = new DataColumn(cellValue);
                                dt.Columns.Add(dataColumn);
                            }
                        }
                    }
                    var Data = new List();
                    var modelGraduateCheckImport = new ModelGraduateCheckImport();
                    //遍历行
                    for (int j = sheet.FirstRowNum + 1; j <= sheet.LastRowNum; j++)
                    {
                        IRow row = sheet.GetRow(j);
                        if (row == null || row.FirstCellNum < 0)//编号
                        {
                            continue;
                        }
                        ////遍历列
                        //for (int i = row.FirstCellNum; i < cellCount; i++)
                        //{
                        //    ICell cellData = row.GetCell(i);  
                        //}
                        if (row.GetCell(0) != null && row.GetCell(1).CellType == CellType.String)
                        {
                            modelGraduateCheckImport.ChecklistBatch = row.GetCell(0).ToString();
                        }
                        if (row.GetCell(1) != null && row.GetCell(1).CellType == CellType.String)
                        {
                            modelGraduateCheckImport.IdentityCardNo = row.GetCell(0).ToString();
                        }
                        if (row.GetCell(2) != null && row.GetCell(2).CellType == CellType.Numeric)
                        {
                            modelGraduateCheckImport.CheckCode = (int)row.GetCell(2).NumericCellValue;
                        }
                        if (row.GetCell(1).CellType == CellType.String)
                        {
                            modelGraduateCheckImport.CheckMark = row.GetCell(3).ToString();
                        }
                        Data.Add(modelGraduateCheckImport);
                        var jsondata = JsonConvert.SerializeObject(Data);

                        Console.WriteLine($"导入的数据为:{jsondata}");
                    }
                }
                else
                {
                    throw new Exception("没有获取到Excel中的数据表！");
                }


                return Json(new { code = 0, msg = "导入成功" });
            }
            catch (Exception)
            {
                return Json(new { code = 0, msg = "导入成功" });
            }
        }