public MaterialsInformationTDS.CostHistoryInformationDataTable GetCostsNew()
        {
            materialsInformationCosts = (MaterialsInformationTDS.CostHistoryInformationDataTable)Session["materialsCostsDummy"];
            if (materialsInformationCosts == null)
            {
                materialsInformationCosts = ((MaterialsInformationTDS)Session["materialsInformationTDS"]).CostHistoryInformation;
            }

            return materialsInformationCosts;
        }
        protected void AddCostsNewEmptyFix(GridView grdView)
        {
            if (grdCosts.Rows.Count == 0)
            {
                int companyId = Int32.Parse(hdfCompanyId.Value);
                MaterialsInformationTDS.CostHistoryInformationDataTable dt = new MaterialsInformationTDS.CostHistoryInformationDataTable();
                dt.AddCostHistoryInformationRow(-1, -1, DateTime.Now, "", 0, 0, false, companyId, false);
                Session["materialsCostsDummy"] = dt;

                grdCosts.DataBind();
            }

            // Normally executes at all postbacks
            if (grdCosts.Rows.Count == 1)
            {
                MaterialsInformationTDS.CostHistoryInformationDataTable dt = (MaterialsInformationTDS.CostHistoryInformationDataTable)Session["materialsCostsDummy"];
                if (dt != null)
                {
                    grdCosts.Rows[0].Visible = false;
                    grdCosts.Rows[0].Controls.Clear();
                }
            }
        }