PrintExtensionContext Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides the context for the printer extension object.
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 PrintExtensionContextPublic Class PrintExtensionContext- Inheritance
- Attributes
Windows requirements
| Device family |
Windows Desktop Extension SDK (introduced in 10.0.10240.0)
|
| API contract |
Windows.Devices.Printers.Extensions.ExtensionsContract (introduced in v1.0)
|
Remarks
The following JavaScript code snippet retrieves the PrinterExtensionContext using a DeviceInformation ID, and then uses the context to create a helper object:
// 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
}
For more information about using the PrinterExtensionContext class, see the UWP device apps for printers topic on the Hardware Dev Center.
Methods
| FromDeviceId(String) |
Gets the context for the printer extension object based on the DeviceInformation ID. |