无法删除指定的项目

Question

我使用以下代码从列表中获取和项目（票证）并根据发票号码删除。但它会删除列表中的第一项。

private void btnTktDelete_Click(object sender, EventArgs e)
    {
        uOp = true;
        if (MainListBox.SelectedIndex != -1)
        {
            Ticket tkt = (Ticket)MainListBox.SelectedItem;    

            List<Ticket> tlist = GetList<Ticket>(tklp);
            Ticket TheTicket = tlist.Find(x => x.InvoiceNumber == tkt.InvoiceNumber);
            List<Transaction> tranlist = GetList<Transaction>(trlp);


            if (TheTicket != null)
            {
                Int32 number = TheTicket.InvoiceNumber;
                tlist.RemoveAll(x=>x.InvoiceNumber == number);
                tranlist.RemoveAll(x => x.InvoiceNumber == number);
                SaveList(trlp, tranlist);
                SaveList(tklp, tlist);
            }

         //   MainListBox.DataSource = null;
         //   MainListBox.DataSource = GetList<Ticket>(tklp);
         //   dgvExport.DataSource = null;
         //   dgvExport.DataSource = GetList<Ticket>(tklp);

            uOp = false;

        }
    }

Answer 1

您的代码建议多张票可以使用相同的发票号。这对我来说并不直观 - 应该是独一无二的。获取列表的最简单方法是在字段中存储对它的引用。

List<Ticket> allTickets = ...

private void btnTktDelete_Click(object sender, EventArgs e)
{
    Ticket ticketToRemove = (Ticket)MainListBox.SelectedItem; // need cast?
    allTickets.Remove(ticketToRemove);
    // save...
}