private void AddToEditButton_Click(object sender, EventArgs e)
        {
            OneItemEditForm editForm = new OneItemEditForm();

            if (editForm.ShowDialog() == DialogResult.OK)
            {
                newEdit.AddWithID((Item)editForm.ReturnedItem);
                RefreshMainEditDataView(newEdit);
                MainEditDataView["QChange", MainEditDataView.RowCount - 1].ReadOnly = true;
            }
        }
        //Редактирование одного элемента
        private void EditOnceButton_Click(object sender, EventArgs e)
        {
            OneItemEditForm dialog = new OneItemEditForm();

            try
            {
                dialog.GetSelectedFromFatherForm(MainEditDataView);
            }
            catch (NoNullAllowedException)
            {
                return;
            }
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                int?tmp = ((Item)MainEditDataView.CurrentRow.DataBoundItem).ID;
                ((Item)dialog.ReturnedItem).ID = tmp;
                newEdit.AddWithID((Item)dialog.ReturnedItem, true);
            }
        }