1.先将dataTable转换成流
public Stream DataTableToExcel(DataTable dataTable, string[] columns, string sheetName) { try { using (ExcelPackage pck = new ExcelPackage()) { ExcelWorksheet ws = pck.Workbook.Worksheets.Add(sheetName); ws.Cells["A1"].LoadFromDataTable(dataTable, true); for (int i = 1; i <= columns.Length; i++) //设置excel列名 { using (ExcelRange rng = ws.Cells[1, i]) { rng.Style.Font.Bold = true; rng.Value = columns[i - 1]; } } MemoryStream ms = new MemoryStream(); pck.SaveAs(ms); ms.Flush(); ms.Position = 0;//指定当前流的位置从0开始 return ms; } } catch (Exception ex) { throw ex; } }
保存excel文件
public void ExportExcel(DataTable dt, string[] columns, string sheetName, DownResult result) { Stream stream = DataTableToExcel(dt, columns, sheetName); ExcelPackage package = new ExcelPackage(stream); fileName = sheetName + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xlsx"; filePath = HttpContext.Current.Server.MapPath("~/UploadFile/");//文件保存地址 if (!Directory.Exists(filePath))//如果不存在就创建file文件夹 { Directory.CreateDirectory(filePath); } package.SaveAs(new FileInfo(filePath + fileName)); }