อยากทราบการดึงไฟล์ excel เข้ามาใช้ใน asp.net c# อ่ะค่ะ

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace ExcelC
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnExcel_Click(object sender, EventArgs e)
        {
            Excel.Application xlApp;
            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            object mis = Type.Missing;

            string strFileName = "C:\\ExcelC\\Xls\\csharp-Excel.xls";

            xlApp = new Excel.ApplicationClass();
            xlWorkBook = xlApp.Workbooks.Add(mis);

            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.Add(1);
            xlWorkSheet.Name = "My Sheet2";
            xlWorkSheet.Cells[1, 1] = "Test.Com";

            xlWorkBook.SaveAs(strFileName,
                mis, mis, mis, mis, mis, Excel.XlSaveAsAccessMode.xlExclusive, mis, mis, mis, mis, mis);
            xlWorkBook.Close(true, strFileName, mis);
            xlApp.Quit();


            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkBook);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkSheet);
            GC.Collect();

            MessageBox.Show("c:\\my-Excel.xls");
        }



    }
}