ClaimedPosPrinter.ReleaseDeviceRequested 事件

定义

命名空间:

Windows.Devices.PointOfService

当服务点打印机收到释放其独占声明的请求时发生。

// Register
event_token ReleaseDeviceRequested(TypedEventHandler<ClaimedPosPrinter, PosPrinterReleaseDeviceRequestedEventArgs const&> const& handler) const;

// Revoke with event_token
void ReleaseDeviceRequested(event_token const* cookie) const;

// Revoke with event_revoker
ClaimedPosPrinter::ReleaseDeviceRequested_revoker ReleaseDeviceRequested(auto_revoke_t, TypedEventHandler<ClaimedPosPrinter, PosPrinterReleaseDeviceRequestedEventArgs const&> const& handler) const;

public event TypedEventHandler<ClaimedPosPrinter,PosPrinterReleaseDeviceRequestedEventArgs> ReleaseDeviceRequested;

function onReleaseDeviceRequested(eventArgs) { /* Your code */ }
claimedPosPrinter.addEventListener("releasedevicerequested", onReleaseDeviceRequested);
claimedPosPrinter.removeEventListener("releasedevicerequested", onReleaseDeviceRequested);
- or -
claimedPosPrinter.onreleasedevicerequested = onReleaseDeviceRequested;

Public Custom Event ReleaseDeviceRequested As TypedEventHandler(Of ClaimedPosPrinter, PosPrinterReleaseDeviceRequestedEventArgs) 

事件类型

TypedEventHandler<ClaimedPosPrinter,PosPrinterReleaseDeviceRequestedEventArgs>

注解

发生此事件时，应用有两秒的时间窗口来调用 RetainDeviceAsync ，以便应用可以在设备上保留独占声明。 或者，应用可以调用 Close 来释放声明并立即结束窗口。

另请参阅

• PosPrinterReleaseDeviceRequestedEventArgs
• RetainDeviceAsync()
• Close()