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    ±ØÐëÔÚweb.configÖÐ¼Ó <system.web><identity impersonate="false"/></system.web> ,·ñÔò³öÏÖ´íÎó£ºSystem.Data.OleDb.OleDbException: δָ¶¨µÄ´íÎó¡£¼ÓÁËÒԺ󣬵ã¶à¼¸´ÎÁ´½Ó£¬»á³öÏÖ“Óû§ 'NT AUTHORITY\NETWORK SERVICE' µÇ¼ʧ°Ü”£¬ÐèÒªÖØÐÂÉÏ´«£¬È»ºóÓÖ³öÏÖͬÑùµÄ´íÎó¡£
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   public Random rd;
   rd = new Random(1);
            string filename = this.FileUpload1.PostedFile.FileName;
            //string filename = this.FileUpload1.PostedFile.FileName;
            string type = filename.Substring(filename.LastIndexOf("."));
            string z = Server.MapPath("../file/") + Guid.NewGuid().ToString() + type;
            this.FileUpload1.PostedFile.SaveAs(z);
            SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionString              ["IEISConnectionString"].ConnectionString);
                    SqlCommand cmd = new SqlCommand();
                    cmd.CommandText = "SELECT * from OPENROWSET('MICROSOFT.JET.OLEDB.4.0','Excel 5.0;HDR=Yes;IMEX=1;DATABASE=" + z + "',sheet1$)";
                    SqlDataAdapter da = new SqlDataAdapter();


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