private void PageBorrow_Unloaded(object sender, RoutedEventArgs e)
{
if (_fingerprintChannel != null)
{
FingerPrint.EndFingerprintChannel(_fingerprintChannel);
_fingerprintChannel = null;
}
if (_rfidChannel != null)
{
RFID.EndRfidChannel(_rfidChannel);
_rfidChannel = null;
}
if (_timer != null)
{
_timer.Dispose();
}
}
// 第二阶段：填充图书信息的 PII 和 Title 字段
void FillBookFields()
{
#if NO
RfidChannel channel = RFID.StartRfidChannel(App.RfidUrl,
out string strError);
if (channel == null)
{
throw new Exception(strError);
}
#endif
try
{
foreach (Entity entity in _entities)
{
if (_cancelRefresh == null ||
_cancelRefresh.IsCancellationRequested)
{
return;
}
if (entity.FillFinished == true)
{
continue;
}
//if (string.IsNullOrEmpty(entity.Error) == false)
// continue;
// 获得 PII
// 注：如果 PII 为空，文字重要填入 "(空)"
if (string.IsNullOrEmpty(entity.PII))
{
// var result = channel.Object.GetTagInfo("*", entity.UID);
var result = GetTagInfo(_rfidChannel, entity.UID);
if (result.Value == -1)
{
entity.SetError(result.ErrorInfo);
continue;
}
Debug.Assert(result.TagInfo != null);
entity.TagInfo = result.TagInfo;
LogicChip chip = LogicChip.From(result.TagInfo.Bytes,
(int)result.TagInfo.BlockSize,
"" // tag.TagInfo.LockStatus
);
string pii = chip.FindElement(ElementOID.PII)?.Text;
entity.PII = GetCaption(pii);
}
// 获得 Title
// 注：如果 Title 为空，文字中要填入 "(空)"
if (string.IsNullOrEmpty(entity.Title) &&
string.IsNullOrEmpty(entity.PII) == false && entity.PII != "(空)")
{
var result = GetEntityData(entity.PII,
out string title,
out string item_xml,
out string item_recpath);
if (result.Value == -1)
{
entity.SetError(result.ErrorInfo);
continue;
}
entity.Title = GetCaption(title);
// entity.ItemXml = item_xml;
entity.SetData(item_recpath, item_xml);
}
entity.SetError(null);
entity.FillFinished = true;
}
booksControl.SetBorrowable();
}
catch (Exception ex)
{
#if NO
this.error.Text = ex.Message;
this.error.Visibility = Visibility.Visible;
#endif
this.Error = ex.Message;
}
finally
{
#if NO
RFID.EndRfidChannel(channel);
#endif
}
}
