private void EditForm(AfterSaleRecord eventItem)
        {
            var sk = new AfterSaleRecordEditForm(eventItem);

            sk.StartPosition = FormStartPosition.CenterParent;
            sk.ShowDialog();
        }
        public AfterSaleRecordEditForm(AfterSaleRecord _record)
        {
            InitializeComponent();

            record = _record;

            this.bindingSource1.Add(record);
        }