背景
我正在创建 Windows 10 Universal App ,它从智能卡中读取一些数据(插入智能卡读卡器)并且工作正常,但在所有情况下,用户都应该触发从卡读取数据的过程。
问题:
如何处理卡插入事件'在UWP中,每次插入数据后我都可以从卡中读取数据吗?
答案 0 :(得分:1)
我对UWP并不熟悉,但我发现了example。
它创建了一个智能卡读卡器实例:
private SmartCardReader reader = provisioning.SmartCard.Reader;
并为其添加CardAdded
处理程序:
reader.CardAdded += HandleCardAdded;
HandlerCardAdded
看起来像这样:
void HandleCardAdded(SmartCardReader sender, CardAddedEventArgs args)
{
// This event handler will not be invoked on the UI thread. Hence,
// to perform UI operations we need to post a lambda to be executed
// back on the UI thread; otherwise we may access objects which
// are not marshalled for the current thread, which will result in an
// exception due to RPC_E_WRONG_THREAD.
uiContext.Post((object ignore) =>
{
rootPage.NotifyUser("Card added to reader " + reader.Name + ".", NotifyType.StatusMessage);
}, null);
}
希望这对你有所帮助。