Spire.Xls导出slx表格2：当WPS版本过低时，NPOI导出大数据文件在低版本无法打开

var path = HttpContext.Server.MapPath($"~/Temp/文件xls导出{DateTime.Now.ToString("yyyyMMddHHmmssfff")}.xls");

获取datatable数据...

try
                {
                    Workbook newBook1 = new Workbook();
                    newBook1.CreateEmptySheets(1);
                    Worksheet newSheet1 = newBook1.Worksheets[0];
                    /*写表头*/
                    newSheet1.Range[1, 1].Text = "序号";
                    newSheet1.Range[1, 2].Text = "内容1";
                    newSheet1.Range[1, 3].Text = "内容2";
                    /*写内容*/
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        newSheet1.Range[i + 2, 1].Text = (i+1).ToString();
                        newSheet1.Range[i + 2, 2].Text = dt.Rows[i]["tmp1"].ToString();
                        newSheet1.Range[i + 2, 3].Text = dt.Rows[i]["tmp2"].ToString();
                    }
                    /**设置样式*/
                    newSheet1.AllocatedRange.AutoFitColumns();//列宽自适应
                    newSheet1.Range[1, 1, 1, newSheet1.LastColumn].Style.Font.IsBold = true;//首行字体加粗
                    newSheet1.FreezePanes(2, 1);//首行冻结
                                                /**保存*/
                    newBook1.SaveToFile(path, ExcelVersion.Version2013);　　//保存到服务端，再打开成文件流，返回文件流到前端，避开字节流，避免编码错乱
                    FileStream fs = new FileStream(path, FileMode.Open);
                    return File(fs, "application/text", "导出文件1.xls");
                }
                catch (Exception ex)
                {
                    return Content(ex.Message.ToString());
                }