从BindingList中删除对象时，C＃DataGridView引发异常

Question

Everything was working fine, until I ran this code:

TicketLine tl = (TicketLine)dgTicketLines.SelectedRows[0].DataBoundItem;
tl.Items--;
if (tl.Items < 1)
    CurrentTicket.TicketLines.Remove(tl);

CurrentTicket.TicketLines is a BindingList<TicketLine>

I get several IndexOutOfRange exceptions in the DataGridView when running the above code.

Answer 1

采取ObservableCollection<TicketLine>而不是BindingList，它应该可以工作。

Answer 2

You need to suppress the ListChanged event by setting BindingList<TicketLine>.RaiseListChangedEvents = false; and then call BindingList<TicketLine>.ResetBindings(); when you want any changes to get propagated over to the DataGridView. There are other ways of doing this of course, but this has always worked fine for me.