In the appx manifest, I attempted to register a background task using the following code snippet:
<printsupport:Extension Category="windows.printSupportWorkflow" EntryPoint="PtBackgroundTask.PrintSupportBackgroundTask" uap11:SupportsMultipleInstances="true" />
I confirmed that the namespace is properly declared, but the compilation fails with the error: "The Appx package manifest is invalid." The project compiles successfully only after commenting out this line.
After researching, I found that the following alternative registration methods compile without issues which is under the uap4 framework，category is "windows.printWorkflowBackgroundTask"
<uap4:Extension Category="windows.printWorkflowBackgroundTask" EntryPoint="PtBackgroundTask.PrintSupportBackgroundTask"
uap11:SupportsMultipleInstances="true"/>
The following is the appx manifest file and code for the background registration task.
appx manifest file:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Package
xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:uap4="http://schemas.microsoft.com/appx/manifest/uap/windows10/4"
xmlns:uap11="http://schemas.microsoft.com/appx/manifest/uap/windows10/11"
xmlns:printsupport="http://schemas.microsoft.com/appx/manifest/printsupport/windows10"
IgnorableNamespaces="uap uap4 uap11 mp printsupport">
<Identity
Name="9fc6b82c-561e-4f3d-8514-d6445f2049d8"
Publisher="CN=Admin"
Version="1.0.0.0"/>
<mp:PhoneIdentity PhoneProductId="9fc6b82c-561e-4f3d-8514-d6445f2049d8" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>
<Properties>
<DisplayName>PsaSampleApp</DisplayName>
<PublisherDisplayName>PsaSample Document Solutions Inc</PublisherDisplayName>
<Logo>Assets\StoreLogo.png</Logo>
</Properties>
<Dependencies>
<TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.26100.0" />
<PackageDependency Name="Microsoft.UI.Xaml.2.8" MinVersion="8.2310.30001.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.NET.Native.Framework.2.2" MinVersion="2.2.29512.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.NET.Native.Runtime.2.2" MinVersion="2.2.28604.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.VCLibs.140.00" MinVersion="14.0.33519.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.Services.Store.Engagement" MinVersion="10.0.23012.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.VCLibs.140.00.UWPDesktop" MinVersion="14.0.33728.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
<PackageDependency Name="Microsoft.VCLibs.140.00.Debug" MinVersion="14.0.33519.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
</Dependencies>
<Resources>
<Resource Language="EN-US" />
<Resource uap:Scale="200" />
</Resources>
<Applications>
<Application Id="App"
Executable="$targetnametoken$.exe"
EntryPoint="PsaSampleApp.App">
<uap:VisualElements
DisplayName="PsaSampleApp"
Square150x150Logo="Assets\Square150x150Logo.png"
Square44x44Logo="Assets\Square44x44Logo.png"
Description="PsaSampleApp"
BackgroundColor="transparent">
<uap:DefaultTile Wide310x150Logo="Assets\Wide310x150Logo.png"/>
<uap:SplashScreen Image="Assets\SplashScreen.png" />
</uap:VisualElements>
<Extensions>
<uap:Extension Category="windows.printTaskSettings" Executable="PsaSampleApp.exe" EntryPoint="PsaSampleApp.App" uap11:SupportsMultipleInstances="true"/>
<printsupport:Extension Category="windows.printSupportSettingsUI" EntryPoint="PsaSampleApp.App" uap11:SupportsMultipleInstances="true"/>
<printsupport:Extension Category="windows.printSupportJobUI" EntryPoint="PsaSampleApp.App" uap11:SupportsMultipleInstances="true"/>
<!--<uap4:Extension Category="windows.printWorkflowBackgroundTask" EntryPoint="PtBackgroundTask.PrintSupportBackgroundTask" uap11:SupportsMultipleInstances="true"/>-->
<printsupport:Extension Category="windows.printSupportWorkflow" EntryPoint="PtBackgroundTask.PrintSupportBackgroundTask" uap11:SupportsMultipleInstances="true" /> </Extensions>
</Application>
</Applications>
<Capabilities>
<Capability Name="internetClient" />
</Capabilities>
</Package>
PtBackgroundTask:
namespace PtBackgroundTask
{
public sealed class PrintSupportBackgroundTask : IBackgroundTask
{
private BackgroundTaskDeferral taskDeferral;
private PrintSupportExtensionSession session;
private IppPrintDevice ippPrintDevice;
public void Run(IBackgroundTaskInstance taskInstance)
{
Debug.WriteLine("### PrintSupportBackgroundTask is running ###");
// 获取任务延迟对象
taskDeferral = taskInstance.GetDeferral();
taskInstance.Canceled += OnTaskCanceled;
// 获取打印支持扩展触发详情
var triggerDetails = taskInstance.TriggerDetails as PrintSupportExtensionTriggerDetails;
if (triggerDetails == null)
{
Debug.WriteLine("Error: invalid triggerDetails..");
taskDeferral.Complete();
return;
}
// 获取打印会话
session = triggerDetails.Session as PrintSupportExtensionSession;
if (session == null)
{
Debug.WriteLine("Error: get session fail..");
taskDeferral.Complete();
return;
}
}
}
}
What are the differences between these registration methods? How should I correct the error to use the printsupport method successfully?
I confirmed that the namespace is properly declared, but the compilation fails with the error: "The Appx package manifest is invalid.
You need to refer this doc first, Your problem is uap11:SupportsMultipleInstances="true" is not Extension property, it is Application property. And then I will post the complete Package.appxmanifest file as reference below for you.
<?xml version="1.0" encoding="utf-8"?>
<Package
xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"
xmlns:iot2="http://schemas.microsoft.com/appx/manifest/iot/windows10/2"
xmlns:printsupport="http://schemas.microsoft.com/appx/manifest/printsupport/windows10"
IgnorableNamespaces="uap mp">
<Identity
Name="b65f4916-9199-46a3-8d41-f95fa5ca4dcd"
Publisher="CN=U59166"
Version="1.0.0.0" />
<mp:PhoneIdentity PhoneProductId="b65f4916-9199-46a3-8d41-f95fa5ca4dcd" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>
<Properties>
<DisplayName>PrintApp</DisplayName>
<PublisherDisplayName>U59166</PublisherDisplayName>
<Logo>Assets\StoreLogo.png</Logo>
</Properties>
<Dependencies>
<TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
</Dependencies>
<Resources>
<Resource Language="x-generate"/>
</Resources>
<Applications>
<Application Id="App"
desktop4:SupportsMultipleInstances="true"
iot2:SupportsMultipleInstances="true"
Executable="$targetnametoken$.exe"
EntryPoint="PrintApp.App">
<uap:VisualElements
DisplayName="PrintApp"
Square150x150Logo="Assets\Square150x150Logo.png"
Square44x44Logo="Assets\Square44x44Logo.png"
Description="PrintApp"
BackgroundColor="transparent">
<uap:DefaultTile Wide310x150Logo="Assets\Wide310x150Logo.png"/>
<uap:SplashScreen Image="Assets\SplashScreen.png" />
</uap:VisualElements>
<Extensions>
<printsupport:Extension Category="windows.printSupportWorkflow"
EntryPoint="PsaBackgroundTasks.PrintSupportWorkflowSample" />
</Extensions>
</Application>
</Applications>
<Capabilities>
<Capability Name="internetClient" />
</Capabilities>
</Package>