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private void Uploadfile(string filepath)
        {
           //string filepath = Request["filepath"].ToString();
            Response.ContentType = "text/plain";
            if (filepath == "" || filepath == null)
            {
                return;
            }
            else
            {
                FileStream fs=null;
                BinaryReader br=null;
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb; //µ¼ÈëÃüÃû¿Õ¼ä
using System.IO;
using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;
using System.Data;
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