protected void btnConfirm_Click(object sender, EventArgs e)
 {
     try
     {
         prodObj = new ProductClass();
         DataTable dtExcel = (DataTable)ViewState["ExcelData"];
         if (dtExcel.Rows.Count > 0)
         {
             int insert = prodObj.SaveProductByExcel(dtExcel);
             if (insert > 0)
             {
                 ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "script", "successfull('" + insert + " ','Products added Successfully.')", true);
                 btnConfirm.Visible  = false;
                 btnUpload.Visible   = true;
                 btnDownload.Visible = true;
                 tbl.Visible         = false;
             }
         }
     }
     catch (Exception ex)
     {
         ex.Message.ToString();
     }
 }