andrewleader

Overall steps... Requires WinAppSDK 1.0.0 Preview 3 or greater and you must COMPILE FOR x64 (there's a known bug where this doesn't work from x86 apps)

1. Add code to find existing instance, and if found, redirect and kill current process using System.Diagnostics.Process.GetCurrentProcess().Kill() (the WinUI 3 Exit() method doesn't work)
2. Add code to handle the activation redirection
3. Install the Microsoft.Windows.CsWin32 NuGet package
4. Add the NativeMethods.txt file with two methods, ShowWindow and SetForegroundWindow (the WinUI 3 Activate and AppWindow Show methods don't work)
5. In the redirection event, call ShowWindow and SetForegroundWindow

Full code sample: https://github.com/andrewleader/RedirectActivationWinUI3Sample

andrewleader

Have you ever wanted to display a preview of your live tile in your app's settings page, so the user can instantly see how your various settings will affect their live tile?

Introducing the PreviewTile control! The PreviewTile is a XAML control that replicates the Start tiles, and fully supports displaying adaptive tile notifications. This is the same control that we use in the Notifications Visualizer.

Using the PreviewTile control is simple. The API's to update properties and send notifications are very similar to the API's you already use for the actual live tiles.

How to use the PreviewTile

andrewleader

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net5.0-windows10.0.19041.0</TargetFramework>
    <UseWPF>true</UseWPF>
  </PropertyGroup>

</Project>

andrewleader

{
  "version": "2.0",
  "logging": {
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "initialSamplingPercentage": 0.0,
        "minSamplingPercentage": 0.0,
        "maxSamplingPercentage": 0.0,
        "excludedTypes": "Event;Exception"

andrewleader

using Microsoft.ApplicationInsights.Channel;
using Microsoft.ApplicationInsights.DataContracts;
using Microsoft.ApplicationInsights.Extensibility;
using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using System.Linq;

[assembly: FunctionsStartup(typeof(MyNamespace.Startup))]

namespace MyNamespace

andrewleader

if (typeof Windows !== 'undefined'&& typeof Windows.UI !== 'undefined' && typeof Windows.UI.Notifications !== 'undefined')  {

    // Construct the toast notification content
    var toastContent = new Windows.Data.Xml.Dom.XmlDocument();

    var toast = toastContent.createElement("toast");
    toastContent.appendChild(toast);

    var visual = toastContent.createElement("visual");
    toast.appendChild(visual);

andrewleader

    if (typeof Windows !== 'undefined' &&
            typeof Windows.UI !== 'undefined' &&
            typeof Windows.UI.Notifications !== 'undefined') {
                
        // Construct the tile notification content
	var tileContent = new Windows.Data.Xml.Dom.XmlDocument();

	var tile = tileContent.createElement("tile");
	tileContent.appendChild(tile);