private async void mCurrentMailbox_MessageDelivery(object sender, cMessageDeliveryEventArgs e)
{
// cautions;
// the event could be for the previously selected mailbox
// this could arrive during the query
// therefore some of the messages could be on the grid already
// we could be processing one of these when the next one arrives
if (e.MessageHandles[0].MessageCache != mCurrentMessageCache)
{
return;
}
if (mFilter != null)
{
return;
}
var lBindingSource = dgvMessages.DataSource as BindingSource;
if (lBindingSource == null)
{
return;
}
frmProgress lProgress = null;
List <cMessage> lMessages;
try
{
if (mProgressBar)
{
lProgress = new frmProgress("loading new messages", e.MessageHandles.Count);
lProgress.ShowAndFocus(this);
var lConfiguration = new cCacheItemFetchConfiguration(lProgress.CancellationToken, lProgress.Increment);
ZMessagesLoadingAdd(lProgress); // so it can be cancelled from code
lMessages = await mCurrentMailbox.MessagesAsync(e.MessageHandles, null, lConfiguration);
}
else
{
lMessages = await mCurrentMailbox.MessagesAsync(e.MessageHandles);
}
}
catch (OperationCanceledException) { return; }
catch (Exception ex)
{
if (!IsDisposed)
{
MessageBox.Show(this, $"a problem occurred: {ex}");
}
return;
}
finally
{
if (lProgress != null)
{
lProgress.Complete();
}
}
// check that while getting the messages we haven't been closed or the mailbox changed
if (IsDisposed || e.MessageHandles[0].MessageCache != mCurrentMessageCache)
{
return;
}
// load the grid with data
ZAddMessagesToGrid(lMessages);
}
private void ZSubscribedMailboxMessageDelivery(object sender, cMessageDeliveryEventArgs e) => ZSubscribedMailboxDisplay();
