asp.net EXCEL导入

  protected void iImport_Click(object sender, EventArgs e)
        {
            if (this.fileUpLoad.HasFile == false)//HasFile用来检查FileUpload是否有指定文件
            {
                Response.Write("<script>alert('请您选择Excel文件')</script> ");
                return;//当无文件时,返回
            }
            string IsXls = System.IO.Path.GetExtension(fileUpLoad.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
            if (IsXls != ".csv")
            {
                Response.Write("<script>alert('只可以选择Excel文件')</script>");
                return;//当选择的不是Excel文件时,返回
            }
            string filename = fileUpLoad.FileName;              //获取Execle文件名  DateTime日期函数
            string savePath = Server.MapPath(("uploadfiles\\") + filename);//Server.MapPath 获得虚拟服务器相对路径
            fileUpLoad.SaveAs(savePath);                        //SaveAs 将上传的文件内容保存在服务器上
            DataSet ds = ExcelSqlConnection(savePath, filename);           //调用自定义方法
            DataRow[] dr = ds.Tables[0].Select();            //定义一个DataRow数组
            int rowsnum = ds.Tables[0].Rows.Count;
            if (rowsnum == 0)
            {
                Response.Write("<script>alert('Excel表为空表,无数据!')</script>");   //当Excel表为空时,对用户进行提示
            }
            else
            {
                for (int i = 0; i < dr.Length; i++)
                {
                    //前面除了你需要在建立一个“upfiles”的文件夹外，其他的都不用管了，你只需要通过下面的方式获取Excel的值，然后再将这些值用你的方式去插入到数据库里面
                    string title = dr[i]["Employee Code"].ToString();
                    string linkurl = dr[i]["Last Working Day"].ToString();

                    //Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");
                }
                Response.Write("<script>alert('Excle表导入成功!');</script>");
            }


 

        }

        #region 连接Excel  读取Excel数据   并返回DataSet数据集合
        /// <summary>
        /// 连接Excel  读取Excel数据   并返回DataSet数据集合
        /// </summary>
        /// <param name="filepath">Excel服务器路径</param>
        /// <param name="tableName">Excel表名称</param>
        /// <returns></returns>
        public static System.Data.DataSet ExcelSqlConnection(string filepath, string tableName)
        {
            //string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'";

            //OleDbConnection ExcelConn = new OleDbConnection(strCon);
            //try
            //{
            //    string strCom = string.Format("SELECT * FROM [Sheet1$]");
            //    ExcelConn.Open();
            //    OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn);
            //    DataSet ds = new DataSet();
            //    myCommand.Fill(ds, "[" + tableName + "$]");
            //    ExcelConn.Close();
            //    return ds;
            //}
            //catch
            //{
            //    ExcelConn.Close();
            //    return null;
            //}

            //string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'";
            string strConn = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='text;HDR=Yes;FMT=Delimited';Data Source=" + filepath + ";");  //连接数据。  Data Source为CSV
            OleDbConnection ExcelConn = new OleDbConnection(strConn);
            try
            {
                string sql = "select * from leaveDateCalculate.csv";
                ExcelConn.Open();
                OleDbDataAdapter myCommand = new OleDbDataAdapter(sql, ExcelConn);
                DataSet ds = new DataSet();
                myCommand.Fill(ds,   tableName );
                ExcelConn.Close();
                return ds;
            }
            catch
            {
                ExcelConn.Close();
                return null;
            }
        }
        #endregion

    }