protected void btnConfirm_Click1(object sender, EventArgs e) { CommonBusiness commonBusiness = new CommonBusiness(); CheckOutRequestBusiness reqBusiness = new CheckOutRequestBusiness(); var userID = Session[sessionNames.userID_Karbar].ToString(); var reqList = (List <int>)ViewState["studentRequestList"]; if (reqList != null && reqList.Count > 0) { reqBusiness.SetDateApprove(reqList, Convert.ToInt32(userID), commonBusiness.GetIPAddress()); } grdResualtList.Rebind(); }