protected void GridViewCheckOut_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string ItemID = Convert.ToString(GridViewCheckOut.DataKeys[e.RowIndex].Values[0]);
List <InventoryCatalogue> ic = (List <InventoryCatalogue>)Session["CartList"];
List <InventoryCatalogue> icNew = RequisitionLogic.DeleteOrder(ic, ItemID);
GridViewCheckOut.DataSource = icNew;
GridViewCheckOut.DataBind();
Session["CartList"] = icNew;
Response.Redirect("~/DepartmentEmployee/ViewCatalogue.aspx");
}