导出excel的简单方法

　　excel的操作，最常用的就是导出和导入，废话不多说上代码。

本例使用NPOI实现的，不喜勿喷哈。。。。

   /// <summary>
         /// 导出Excel
         /// </summary>
         /// <param name="stime"></param>
         /// <param name="etime"></param>
         /// <returns></returns>
         public ActionResult Export(FormCollection frm)
         {
             DataTable dts = new DataTable();
             dts = _shopMemeber.ExportMemberData(frm);
             IWorkbook workbook = new XSSFWorkbook();
             ISheet sheet = workbook.CreateSheet();
             IRow headerRow = sheet.CreateRow();
             foreach (DataColumn column in dts.Columns)
                 headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);
             int rowIndex = ;
             foreach (DataRow row in dts.Rows)
             {
                 IRow dataRow = sheet.CreateRow(rowIndex);
                 foreach (DataColumn column in dts.Columns)
                 {
                     dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
                 }
                 rowIndex++;
             }
             string filepath = Server.MapPath("/") + @"用户列表.xlsx";
             FileStream file = new FileStream(filepath, FileMode.Create);
             workbook.Write(file);
             ExcelHelper.DownLoad(@"/用户列表.xlsx");
             #region 不启用

             #endregion
             return SuccessMsg("AdminMemberMemberIndex");
         }
 //这个是下载到桌面的方法，没实现自选路径
 public static void DownLoad(string FileName)
  {
              FileInfo fileInfo = new FileInfo(HttpContext.Current.Server.MapPath(FileName));
              //以字符流的形式下载文件
              FileStream fs = new FileStream(HttpContext.Current.Server.MapPath(FileName), FileMode.Open);
             byte[] bytes = new byte[(int)fs.Length];
               fs.Read(bytes, , bytes.Length);
             fs.Close();
             HttpContext.Current.Response.ContentType = "application/octet-stream";
                //通知浏览器下载文件而不是打开
             HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;  filename=" + HttpUtility.UrlEncode(fileInfo.Name, System.Text.Encoding.UTF8));
           HttpContext.Current.Response.BinaryWrite(bytes);
            HttpContext.Current.Response.Flush();
             HttpContext.Current.Response.End();
         }

上面是导出，下面我介绍下导入。

  /// <summary>
         /// 导入数据
         /// </summary>
         /// <param name="file"></param>
         /// <returns>true表示导入成功</returns>
         public bool Impoart(HttpPostedFileBase file)
         {
             try
             {
                 //保存excel
                 string path = HttpContext.Current.Server.MapPath("/");
                 file.SaveAs(path + file.FileName);

                 //读取

                 FileStream sw = File.Open(path + file.FileName, FileMode.Open, FileAccess.Read);
                 IWorkbook workbook = new XSSFWorkbook(sw);
                 ISheet sheet1 = workbook.GetSheet("Sheet1");

                 //最大行数
                 int rowsCount = sheet1.PhysicalNumberOfRows;

                 //判断首行是否符合规范  也就是Excel中的列名
                 IRow firstRow = sheet1.GetRow();
                 if (
                     !(firstRow.GetCell().ToString() == "名称" && firstRow.GetCell().ToString() == "简称" &&
                       firstRow.GetCell().ToString() == "分类" && firstRow.GetCell().ToString() == "参考价" &&
                       firstRow.GetCell().ToString() == "商品介绍"))
                 {
                     return false;
                 }

                 //跳过类型不正确的品项
                 for (int i = ; i < rowsCount; i++)
                 {
                     IRow row = sheet1.GetRow(i);
                     Shop_Product product = new Shop_Product();

                     string category = row.GetCell() != null ? row.GetCell().ToString() : null;
                     if (!string.IsNullOrEmpty(category))
                     {
                         var cate =
                             _unitOfWork.Shop_ProductCategoryRepository().GetAll().FirstOrDefault(t => t.Name == category);
                         if (cate != null)
                         {
                             product.ProductCategoryName = cate.Name;
                             product.Shop_ProductCategory_ID = cate.ID;
                         }
                         else
                         {
                             continue;
                         }
                     }
                     else
                     {
                         continue;
                     }

                     product.PName = row.GetCell() != null ? row.GetCell().ToString() : null;
                     product.PCName = row.GetCell() != null ? row.GetCell().ToString() : null;
                     if (row.GetCell() != null)
                     {
                         product.Price = Double.Parse(row.GetCell().ToString());
                     }
                     product.Description = row.GetCell() != null ? row.GetCell().ToString() : null;

                     _unitOfWork.Shop_ProductRepository().Insert(product);
                 }

                 _unitOfWork.Save();
             }
             catch
             {
                 return false;
             }

             return true;
         }