轉自：http://www.cnblogs.com/fang8206/archive/2011/04/21/2023359.html

　 //把Excel文件上傳到服務器并返回文件路徑        PRivate String typename(FileUpload fileloads)        {            string fullfilename = fileloads.PostedFile.FileName;            string filename = fullfilename.Substring(fullfilename.LastIndexOf("//") + 1);            string type = fullfilename.Substring(fullfilename.LastIndexOf(".") + 1);            string murl = "";            if (type == "xls" || type == "xlsx")            {                fileloads.PostedFile.SaveAs(Server.MapPath(filename));                //fileloads.PostedFile.SaveAs(Server.MapPath(Tools.GetAppSettings("ExcelPath")) + "//" + filename);                murl = Server.MapPath(filename);            }            else            {                Tools.ShowMsg("導入文件格式不對！");                //Response.Write("<script language='javascript'>alert('導入文件格式不對!');</script>");            }            return murl;        }

        public DataTable ImportToDataSet(string path)         {            string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + path + ";" + "Extended Properties='Excel 12.0;HDR=Yes;IMEX=1';";

            OleDbConnection conn = new OleDbConnection(strConn);              try             {                  DataTable dt = new DataTable();                  if (conn.State != ConnectionState.Open)                      conn.Open();                  string strExcel = "select * from [Sheet1$]";                  OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);                  adapter.Fill(dt);                  return dt;              }              catch (Exception ex)              {                  throw new Exception(ex.Message);              }              finally             {                  if (conn.State != ConnectionState.Closed)                      conn.Close();              }          } 

        protected void btnImport_Click(object sender, EventArgs e)        {            try            {                DataTable dt = ImportToDataSet(typename(selectfile));                int j = 0;                bool sec = true;                                for (int i = 0; i < dt.Rows.Count; i++)                {                    ShippingCharge sc = new ShippingCharge();                    string RegionID = dt.Rows[i][1].ToString();                    if (!RegionID.IsNullOrEmpty() && Service.GetShippingRegion(dt.Rows[i][1].ToString()) != null)                    {                        sc.RegionID = Service.GetShippingRegion(dt.Rows[i][1].ToString()).RegionID;                    }

                    sc.Status = Convert.ToByte(dt.Rows[i][2].ToString()=="否"?0:1);

                    sec = Service.AddShippingCharge(sc);                    if (sec == false)                    {                        j++;                    }                }                                if(j > 0)                {                    Tools.ShowMsg("導入文件失敗,請確認文件格式再重試一次！");                }                else                {                     //關閉,刪除 文件                      string filepath = Server.MapPath(selectfile.PostedFile.FileName);                    if (File.Exists(filepath))                        File.Delete(filepath);                      Tools.ShowMsg("導入文件成功！", "ShippingCharges_List.aspx");                }            }            catch (Exception ex)            {                Tools.ShowMsg("導入文件失敗,請確認文件格式再重試一次！");

            }        }