ASP.NETCore -----导入Excel文件
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前端上传excel文件利用npoi读取数据转换成datatable(netcore坑爹啊，用的vs2017竟然不能可视化)
前端界面
@ Layout = null; <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>Xlsx</title> </head> <body> <form enctype="multipart/form-data" method="post" asp-action="ImportToDataTable"> <input type="file" name="excelfile" /> <input type="submit" value="上传" /> </form> </body> </html>
后台
/// <summary> /// 导入EXCEL数据 /// </summary> /// <param name="filePath">文件路径</param> /// <returns></returns> public void ImportToDataTable(IFormFile excelfile) DataTable dt = new DataTable(); var filePath = excelfile.FileName.Split(‘.‘); if (filePath[1].ToLower()==".xls") //.xls #region .xls文件处理:HSSFWorkbook HSSFWorkbook hssfworkbook; try using (MemoryStream ms = new MemoryStream()) excelfile.CopyTo(ms); ms.Seek(0, SeekOrigin.Begin); hssfworkbook = new HSSFWorkbook(ms); ISheet sheet = hssfworkbook.GetSheetAt(0); System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); var maxRowIndex = 0; while (rows.MoveNext()) IRow row = (HSSFRow)rows.Current; var r = row.Cells.Select(p => p.StringCellValue).ToList(); var _result = row.Cells.Any(t => !string.IsNullOrEmpty(t.StringCellValue)); if (_result) maxRowIndex = row.RowNum; break; HSSFRow headerRow = (HSSFRow)sheet.GetRow(maxRowIndex);//取第二行 var _ColumnIndex = new List<int>(); //一行最后一个方格的编号 即总的列数 for (int j = 0; j < (headerRow.LastCellNum); j++) //SET EVERY COLUMN NAME HSSFCell cell = (HSSFCell)headerRow.GetCell(j); if (!string.IsNullOrEmpty(cell.StringCellValue)) dt.Columns.Add(cell.ToString()); _ColumnIndex.Add(cell.ColumnIndex); while (rows.MoveNext()) IRow row = (HSSFRow)rows.Current; DataRow dr = dt.NewRow(); if (row.RowNum <= headerRow.RowNum) continue; for (int i = 0; i < _ColumnIndex.Count; i++) if (i >= dt.Columns.Count) break; ICell cell = row.GetCell(_ColumnIndex[i]); if ((i == 0) && cell == null)//每行第一个cell为空,break break; if (cell == null) dr[i] = null; else switch (cell.CellType) case CellType.String: dr[i] = cell.StringCellValue; break; case CellType.Numeric: if (DateUtil.IsCellDateFormatted(cell)) dr[i] = cell.DateCellValue; else dr[i] = cell.NumericCellValue; break; default: dr[i] = null; break; dt.Rows.Add(dr); catch (Exception e) throw new Exception(e.Message, e); #endregion else //.xlsx #region .xlsx文件处理:XSSFWorkbook XSSFWorkbook hssfworkbook; try using (MemoryStream ms = new MemoryStream()) excelfile.CopyTo(ms); ms.Seek(0, SeekOrigin.Begin); hssfworkbook = new XSSFWorkbook(ms); ISheet sheet = hssfworkbook.GetSheetAt(0); // ISheet sheet = hssfworkbook.GetSheet(sheetName); System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); var maxRowIndex = 0; while (rows.MoveNext()) IRow row = (XSSFRow)rows.Current; var _result = row.Cells.Any(t => !string.IsNullOrEmpty(t.StringCellValue)); if (_result) maxRowIndex = row.RowNum; break; XSSFRow headerRow = (XSSFRow)sheet.GetRow(maxRowIndex);//取第二行 var _ColumnIndex = new List<int>(); //一行最后一个方格的编号 即总的列数 for (int j = 0; j < (headerRow.LastCellNum); j++) //SET EVERY COLUMN NAME XSSFCell cell = (XSSFCell)headerRow.GetCell(j); if (!string.IsNullOrEmpty(cell.StringCellValue)) dt.Columns.Add(cell.ToString()); _ColumnIndex.Add(cell.ColumnIndex); while (rows.MoveNext()) IRow row = (XSSFRow)rows.Current; DataRow dr = dt.NewRow(); if (row.RowNum == 0) continue; for (int i = 0; i < _ColumnIndex.Count; i++) if (i >= dt.Columns.Count) break; ICell cell = row.GetCell(_ColumnIndex[i]); if ((i == 0) && (cell == null))//每行第一个cell为空,break break; if (cell == null) dr[i] = null; else switch (cell.CellType) case CellType.String: dr[i] = cell.StringCellValue; break; case CellType.Numeric: if (DateUtil.IsCellDateFormatted(cell)) dr[i] = cell.DateCellValue; else dr[i] = cell.NumericCellValue; break; default: dr[i] = null; break; dt.Rows.Add(dr); catch (Exception e) throw new Exception(e.Message, e); #endregion var a = dt.Rows.Count;//测试看是否有数据
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