手把手教你mvc导入excel

<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);      }}