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Communication blocking and filtering sample

Shows how to make a block and filter application for call and text message. Uses the CommunicationBlockingAppManager class to set itself as the active communication blocking app and uses the PhoneCallBlocking class to set the phone numbers which are blocked.

Note: This sample is part of a large collection of UWP feature samples. If you are unfamiliar with Git and GitHub, you can download the entire collection as a ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.

This sample demonstrates how to

  • Register background tasks for blocking and filtering calls and text messages.
    • A task which runs when the session starts. The task sets the blocked number list.
    • A task which runs when the app becomes the active communication blocking app. The task sets the blocked number list.
    • A task which runs when a call is blocked.
    • A task which runs when a text message is blocked.
    • A task which runs when a text message is received. The task evaluates the text message and decide whether to block it.
  • Determine whether the app is the the active communication blocking app.
  • Display the system UI to let the user choose a communication blocking app.
  • Set the phone numbers which are blocked.

See the Package.appxmanifest file for the extensions and capabilities a communication blocking and filtering app must declare.

Note The Windows universal samples require Visual Studio 2017 to build and Windows 10 to execute.

To obtain information about Windows 10 development, go to the Windows Dev Center

To obtain information about Microsoft Visual Studio and the tools for developing Windows apps, go to Visual Studio

Related topics

Reference

Windows.ApplicationModel.CommunicationBlocking namespace
Windows.ApplicationModel.Calls namespace
CommunicationBlockingAppManager class
PhoneCallBlocking class
SystemTrigger class
CommunicationBlockingAppSetAsActiveTrigger class
PhoneTrigger class
ChatMessageNotificationTrigger class
ChatMessageReceivedNotificationTrigger class

System requirements

Client: Not supported

Server: Not supported

Phone: Windows 10

Build the sample

  1. Start Microsoft Visual Studio 2017 and select File > Open > Project/Solution.
  2. Go to the directory to which you unzipped the sample. Then go to the subdirectory containing the sample in the C# language. Double-click the Visual Studio Solution (.sln) file.
  3. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

  • Select Build > Deploy Solution.

Deploying and running the sample

  • To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or selectDebug > Start Without Debugging.