PrintExtensionContext 类

定义

public ref class PrintExtensionContext abstract sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Devices.Printers.Extensions.ExtensionsContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class PrintExtensionContext final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Devices.Printers.Extensions.ExtensionsContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public static class PrintExtensionContext

Public Class PrintExtensionContext

继承

Object Platform::Object IInspectable PrintExtensionContext

属性

ContractVersionAttribute MarshalingBehaviorAttribute

Windows 要求

注解

以下 JavaScript 代码片段使用 DeviceInformation ID 检索 PrinterExtensionContext，然后使用上下文创建帮助程序对象：

// This function runs when the user taps the Back button
function getInkStatus(deviceInformationId) {
    var responseString;
    try {
        var context = Windows.Devices.Printers.Extensions.
            PrintExtensionContext.fromDeviceId(deviceInformationId);
        var helper = new Microsoft.Samples.Printing.WwaDca.
            PrintHelperClass(context);
        var responseString = helper.getInkLevel(1);
    } catch (e) {
        responseString = "deviceInformationId: " + deviceInformationId + 
            " Message: " + e.message;
    }
    return responseString
}

有关使用 PrinterExtensionContext 类的详细信息，请参阅硬件开发人员中心上的 适用于打印机的 UWP 设备应用 主题。

方法

适用于

另请参阅

• DeviceInformation 类
• 适用于打印机的 UWP 设备应用