<div class="filebtn"> @using (Html.BeginForm("importexcel", "foot", FormMethod.Post, new { enctype = "multipart/form-data" })){<samp>请选择要上传的Excel文件：</samp><span  id="txt_Path"></span><strong>选择文件<input name="file" type="file" id="file" /></strong>@*@Html.AntiForgeryToken()  //防止跨站请求伪造(CSRF:Cross-site request forgery)攻击*@<input type="submit" id="ButtonUpload" value="提交"   class="offer"/> }</div>

public class footController : Controller{//// GET: /foot/private static readonly String Folder = "/files";public ActionResult excel(){return View();}/// 导入excel文档public ActionResult importexcel(){//1.接收客户端传过来的数据HttpPostedFileBase file = Request.Files["file"];if (file == null || file.ContentLength <= 0){return Json("请选择要上传的Excel文件", JsonRequestBehavior.AllowGet);}//string filepath =  Server.MapPath(Folder);//if (!Directory.Exists(filepath))//{//    Directory.CreateDirectory(filepath);//}//var fileName = Path.Combine(filepath, Path.GetFileName(file.FileName));// file.SaveAs(fileName);//获取一个streamfile对象，该对象指向一个上传文件，准备读取改文件的内容Stream streamfile = file.InputStream;DataTable dt = new DataTable();string FinName = Path.GetExtension(file.FileName);if (FinName != ".xls" && FinName != ".xlsx"){return Json("只能上传Excel文档",JsonRequestBehavior.AllowGet);}else{try{if (FinName == ".xls"){//创建一个webbook，对应一个Excel文件(用于xls文件导入类)HSSFWorkbook hssfworkbook = new HSSFWorkbook(streamfile);dt = excelDAL.ImExport(dt, hssfworkbook);}else{XSSFWorkbook hssfworkbook = new XSSFWorkbook(streamfile);dt = excelDAL.ImExport(dt, hssfworkbook);}return Json("",JsonRequestBehavior.AllowGet);}catch(Exception ex){return Json("导入失败 ！"+ex.Message, JsonRequestBehavior.AllowGet);}}}}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NPOI;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;
using System.Data;
using NPOI.XSSF.UserModel;namespace GJL.Compoent
{public class excelDAL{///<summary>/// #region 两种不同版本的操作excel/// 扩展名*.xlsx/// </summary>public static DataTable ImExport(DataTable dt, XSSFWorkbook  hssfworkbook){NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0);System.Collections.IEnumerator rows = sheet.GetRowEnumerator();for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++){dt.Columns.Add(sheet.GetRow(0).Cells[j].ToString());}while (rows.MoveNext()){XSSFRow row = (XSSFRow)rows.Current;DataRow dr = dt.NewRow();for (int i = 0; i < row.LastCellNum; i++){NPOI.SS.UserModel.ICell cell = row.GetCell(i);if (cell == null){dr[i] = null;}else{dr[i] = cell.ToString();}}dt.Rows.Add(dr);}dt.Rows.RemoveAt(0);if (dt!=null && dt.Rows.Count != 0){for (int i = 0; i < dt.Rows.Count; i++){string categary = dt.Rows[i]["页面"].ToString();string fcategary = dt.Rows[i]["分类"].ToString();string fTitle = dt.Rows[i]["标题"].ToString();string fUrl = dt.Rows[i]["链接"].ToString();FooterDAL.Addfoot(categary, fcategary, fTitle, fUrl);}}return dt;}#region 两种不同版本的操作excel///<summary>/// 扩展名*.xls/// </summary>public static DataTable ImExport(DataTable dt, HSSFWorkbook hssfworkbook){// 在webbook中添加一个sheet,对应Excel文件中的sheet,取出第一个工作表，索引是0 NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0);System.Collections.IEnumerator rows = sheet.GetRowEnumerator();for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++){dt.Columns.Add(sheet.GetRow(0).Cells[j].ToString());}while (rows.MoveNext()){HSSFRow row = (HSSFRow)rows.Current;DataRow dr = dt.NewRow();for (int i = 0; i < row.LastCellNum; i++){NPOI.SS.UserModel.ICell cell = row.GetCell(i);if (cell == null){dr[i] = null;}else {dr[i] = cell.ToString();}}dt.Rows.Add(dr);}dt.Rows.RemoveAt(0);if (dt != null && dt.Rows.Count != 0){for (int i = 0; i < dt.Rows.Count; i++){string categary = dt.Rows[i]["页面"].ToString();string fcategary = dt.Rows[i]["分类"].ToString();string fTitle = dt.Rows[i]["标题"].ToString();string fUrl = dt.Rows[i]["链接"].ToString();FooterDAL.Addfoot(categary, fcategary, fTitle, fUrl);}}return dt;}#endregion}
}

 public static partial class FooterDAL{/// <summary>/// 添加/// </summary>/// <param name="id"></param>/// <param name="catgary"></param>/// <param name="fcatgary"></param>/// <param name="fTitle"></param>/// <param name="fUrl"></param>/// <returns></returns>public static int  Addfoot(string categary, string fcategary, string fTitle, string fUrl){string sql = string.Format("insert into Foot (categary,fcategary,fTitle,fUrl)values(@categary,@fcategary,@fTitle,@fUrl)");SqlParameter[] parm = { new SqlParameter("@categary",categary),new SqlParameter("@fcategary",fcategary),new SqlParameter("@fTitle",fTitle),new SqlParameter("@fUrl",fUrl)};return new DBHelperSQL<Foot>(CommonTool.dbname).ExcuteSql(sql,parm);   }
}