asp.net导出excel示例代码

asp.net导出excel的简单方法。

excel的操作，最常用的就是导出和导入。

本例使用NPOI实现。

代码: ///   <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( 0);
             foreach (DataColumn column  in dts.Columns)
                headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);
             int rowIndex =  1;
             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,  0, 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。

复制代码 代码如下:

///   <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( 0);
                 if (
                    !(firstRow.GetCell( 0).ToString() ==  " 名称 " && firstRow.GetCell( 1).ToString() ==  " 简称 " &&
                      firstRow.GetCell( 2).ToString() ==  " 分类 " && firstRow.GetCell( 3).ToString() ==  " 参考价 " &&
                      firstRow.GetCell( 4).ToString() ==  " 商品介绍 "))
                {
                     return  false;
                }

                 // 跳过类型不正确的品项
                 for ( int i =  1; i < rowsCount; i++)
                {
                    IRow row = sheet1.GetRow(i);
                    Shop_Product product =  new Shop_Product();
                     string category = row.GetCell( 2) !=  null ? row.GetCell( 2).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( 0) !=  null ? row.GetCell( 0).ToString() :  null;
                    product.PCName = row.GetCell( 1) !=  null ? row.GetCell( 1).ToString() :  null;
                     if (row.GetCell( 3) !=  null)
                    {
                        product.Price = Double.Parse(row.GetCell( 3).ToString());
                    }
                    product.Description = row.GetCell( 4) !=  null ? row.GetCell( 4).ToString() :  null;  //  www.jbxue.com
           _unitOfWork.Shop_ProductRepository().Insert(product);
                }
                _unitOfWork.Save();
            }
             catch
            {
                 return  false;
            }
             return  true;
        }