// 从缓存中获取标签信息
GetTagInfoResult GetTagInfo(RfidChannel channel, string uid)
{
TagInfo info = (TagInfo)_tagTable[uid];
if (info == null)
{
var result = channel.Object.GetTagInfo("*", uid);
if (result.Value == -1)
{
return(result);
}
info = result.TagInfo;
if (info != null)
{
if (_tagTable.Count > 1000)
{
_tagTable.Clear();
}
_tagTable[uid] = info;
}
}
return(new GetTagInfoResult {
TagInfo = info
});
}
// return:
// -2 remoting服务器连接失败。驱动程序尚未启动
// -1 出错
// 0 成功
public static NormalResult SetEAS(
RfidChannel channel,
string reader_name,
string tag_name,
bool enable,
out string strError)
{
strError = "";
try
{
return(channel.Object.SetEAS(reader_name,
tag_name,
enable));
}
// [System.Runtime.Remoting.RemotingException] = {"连接到 IPC 端口失败: 系统找不到指定的文件。\r\n "}
catch (System.Runtime.Remoting.RemotingException ex)
{
strError = "针对 " + App.RfidUrl + " 的 SetEAS() 操作失败: " + ex.Message;
return(new NormalResult {
Value = -2, ErrorInfo = strError
});
}
catch (Exception ex)
{
strError = "针对 " + App.RfidUrl + " 的 SetEAS() 操作失败: " + ex.Message;
return(new NormalResult {
Value = -1, ErrorInfo = strError
});
}
}
public static void EndRfidChannel(RfidChannel channel)
{
if (channel != null && channel.Channel != null)
{
ChannelServices.UnregisterChannel(channel.Channel);
channel.Channel = null;
}
}
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();
}
}
public static RfidChannel StartRfidChannel(
string strUrl,
out string strError)
{
strError = "";
RfidChannel result = new RfidChannel();
result.Channel = new IpcClientChannel(Guid.NewGuid().ToString(), // 随机的名字，令多个 Channel 对象可以并存
new BinaryClientFormatterSinkProvider());
ChannelServices.RegisterChannel(result.Channel, true);
bool bDone = false;
try
{
result.Object = (IRfid)Activator.GetObject(typeof(IRfid),
strUrl);
if (result.Object == null)
{
strError = "无法连接到服务器 " + strUrl;
return(null);
}
bDone = true;
return(result);
}
catch (Exception ex)
{
strError = "StartRfidChannel() 出现异常: " + ex.Message;
return(null);
}
finally
{
if (bDone == false)
{
EndRfidChannel(result);
}
}
}
// 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
}
}
// EventProxy eventProxy;
private void PageBorrow_Loaded(object sender, RoutedEventArgs e)
{
// throw new Exception("test");
_layer = AdornerLayer.GetAdornerLayer(this.mainGrid);
_adorner = new LayoutAdorner(this);
// 准备指纹通道
List <string> errors = new List <string>();
if (string.IsNullOrEmpty(App.FingerprintUrl) == false)
{
#if NO
eventProxy = new EventProxy();
eventProxy.MessageArrived +=
new MessageArrivedEvent(eventProxy_MessageArrived);
#endif
_fingerprintChannel = FingerPrint.StartFingerprintChannel(
App.FingerprintUrl,
out string strError);
if (_fingerprintChannel == null)
{
errors.Add($"启动指纹通道时出错: {strError}");
}
// https://stackoverflow.com/questions/7608826/how-to-remote-events-in-net-remoting
#if NO
_fingerprintChannel.Object.MessageArrived +=
new MessageArrivedEvent(eventProxy.LocallyHandleMessageArrived);
#endif
try
{
_fingerprintChannel.Object.GetMessage("clear");
_fingerprintChannel.Started = true;
}
catch (Exception ex)
{
if (ex is RemotingException && (uint)ex.HResult == 0x8013150b)
{
errors.Add($"启动指纹通道时出错: “指纹中心”({App.FingerprintUrl})没有响应");
}
else
{
errors.Add($"启动指纹通道时出错(2): {ex.Message}");
}
}
}
// 准备 RFID 通道
if (string.IsNullOrEmpty(App.RfidUrl) == false)
{
_rfidChannel = RFID.StartRfidChannel(
App.RfidUrl,
out string strError);
if (_rfidChannel == null)
{
errors.Add($"启动 RFID 通道时出错: {strError}");
}
try
{
var result = _rfidChannel.Object.ListReaders();
// TODO: 某处界面可以显示当前连接的读卡器名字
// 看看是否有至少一个读卡器
if (result.Readers.Length == 0)
{
errors.Add("当前指纹中心没有任何连接的读卡器。请检查读卡器是否正确连接");
}
else
{
_rfidChannel.Started = true;
}
}
catch (Exception ex)
{
if (ex is RemotingException && (uint)ex.HResult == 0x8013150b)
{
errors.Add($"启动 RFID 通道时出错: “RFID-中心”({App.RfidUrl})没有响应");
}
else
{
errors.Add($"启动 RFID 通道时出错: {ex.Message}");
}
}
}
else
{
errors.Add($"尚未配置 RFID 接口 URL");
}
if (errors.Count > 0)
{
this.Error = StringUtil.MakePathList(errors, "; ");
}
// https://stackoverflow.com/questions/13396582/wpf-user-control-throws-design-time-exception
if (!System.ComponentModel.DesignerProperties.GetIsInDesignMode(this))
{
_timer = new System.Threading.Timer(
new System.Threading.TimerCallback(timerCallback),
null,
TimeSpan.FromSeconds(0),
TimeSpan.FromSeconds(1));
}
}