Add example for telemetry publishing.

Microsoft.FeatureManagement.sln

@@ -15,13 +15,17 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Examples", "Examples", "{FB
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tests.FeatureManagement.AspNetCore", "tests\Tests.FeatureManagement.AspNetCore\Tests.FeatureManagement.AspNetCore.csproj", "{FC0DC3E2-5646-4AEC-A7DB-2D6167BC3BB4}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp", "examples\ConsoleApp\ConsoleApp.csproj", "{7B98D293-F270-423E-A9A6-0D388E903AE9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConsoleApp", "examples\ConsoleApp\ConsoleApp.csproj", "{7B98D293-F270-423E-A9A6-0D388E903AE9}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RazorPages", "examples\RazorPages\RazorPages.csproj", "{36DBB413-D9CA-4C56-AE5B-EAEA4C344DB3}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RazorPages", "examples\RazorPages\RazorPages.csproj", "{36DBB413-D9CA-4C56-AE5B-EAEA4C344DB3}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FeatureFlagDemo", "examples\FeatureFlagDemo\FeatureFlagDemo.csproj", "{DACAB624-4611-42E8-844C-529F93A54980}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FeatureFlagDemo", "examples\FeatureFlagDemo\FeatureFlagDemo.csproj", "{DACAB624-4611-42E8-844C-529F93A54980}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TargetingConsoleApp", "examples\TargetingConsoleApp\TargetingConsoleApp.csproj", "{283D3EBB-4716-4F1D-BA51-A435F7E2AB82}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TargetingConsoleApp", "examples\TargetingConsoleApp\TargetingConsoleApp.csproj", "{283D3EBB-4716-4F1D-BA51-A435F7E2AB82}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EvaluationDataToApplicationInsights", "examples\EvaluationDataToApplicationInsights\EvaluationDataToApplicationInsights.csproj", "{1502529E-47E9-4306-98C4-BF6CF7C7C275}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.FeatureManagement.Telemetry.ApplicationInsights", "src\Microsoft.FeatureManagement.Telemetry.ApplicationInsights\Microsoft.FeatureManagement.Telemetry.ApplicationInsights.csproj", "{3448BDE1-5145-49D4-936A-757B68387439}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -61,6 +65,14 @@ Global
 		{283D3EBB-4716-4F1D-BA51-A435F7E2AB82}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{283D3EBB-4716-4F1D-BA51-A435F7E2AB82}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{283D3EBB-4716-4F1D-BA51-A435F7E2AB82}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1502529E-47E9-4306-98C4-BF6CF7C7C275}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1502529E-47E9-4306-98C4-BF6CF7C7C275}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1502529E-47E9-4306-98C4-BF6CF7C7C275}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1502529E-47E9-4306-98C4-BF6CF7C7C275}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3448BDE1-5145-49D4-936A-757B68387439}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3448BDE1-5145-49D4-936A-757B68387439}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3448BDE1-5145-49D4-936A-757B68387439}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3448BDE1-5145-49D4-936A-757B68387439}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -72,6 +84,7 @@ Global
 		{36DBB413-D9CA-4C56-AE5B-EAEA4C344DB3} = {FB5C34DF-695C-4DF9-8AED-B3EA2516EA72}
 		{DACAB624-4611-42E8-844C-529F93A54980} = {FB5C34DF-695C-4DF9-8AED-B3EA2516EA72}
 		{283D3EBB-4716-4F1D-BA51-A435F7E2AB82} = {FB5C34DF-695C-4DF9-8AED-B3EA2516EA72}
+		{1502529E-47E9-4306-98C4-BF6CF7C7C275} = {FB5C34DF-695C-4DF9-8AED-B3EA2516EA72}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {84DA6C54-F140-4518-A1B4-E4CF42117FBD}

examples/EvaluationDataToApplicationInsights/EvaluationDataToApplicationInsights.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.21.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.AzureAppConfiguration" Version="6.1.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Microsoft.FeatureManagement.AspNetCore\Microsoft.FeatureManagement.AspNetCore.csproj" />
+    <ProjectReference Include="..\..\src\Microsoft.FeatureManagement.Telemetry.ApplicationInsights\Microsoft.FeatureManagement.Telemetry.ApplicationInsights.csproj" />
+  </ItemGroup>
+
+</Project>

examples/EvaluationDataToApplicationInsights/HttpContextTargetingContextAccessor.cs

@@ -0,0 +1,51 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+//
+using Microsoft.FeatureManagement.FeatureFilters;
+
+namespace EvaluationDataToApplicationInsights
+{
+    /// <summary>
+    /// Provides an implementation of <see cref="ITargetingContextAccessor"/> that creates a targeting context using info from the current HTTP request.
+    /// </summary>
+    public class HttpContextTargetingContextAccessor : ITargetingContextAccessor
+    {
+        private const string TargetingContextLookup = "HttpContextTargetingContextAccessor.TargetingContext";
+        private readonly IHttpContextAccessor _httpContextAccessor;
+
+        public HttpContextTargetingContextAccessor(IHttpContextAccessor httpContextAccessor)
+        {
+            _httpContextAccessor = httpContextAccessor ?? throw new ArgumentNullException(nameof(httpContextAccessor));
+        }
+
+        public ValueTask<TargetingContext> GetContextAsync()
+        {
+            HttpContext httpContext = _httpContextAccessor.HttpContext;
+
+            //
+            // Try cache lookup
+            if (httpContext.Items.TryGetValue(TargetingContextLookup, out object value))
+            {
+                return new ValueTask<TargetingContext>((TargetingContext)value);
+            }
+
+            string username = httpContext.Request.Cookies["username"];
+
+            var groups = new List<string>();
+
+            //
+            // Build targeting context based on user info
+            var targetingContext = new TargetingContext
+            {
+                UserId = username,
+                Groups = groups
+            };
+
+            //
+            // Cache for subsequent lookup
+            httpContext.Items[TargetingContextLookup] = targetingContext;
+
+            return new ValueTask<TargetingContext>(targetingContext);
+        }
+    }
+}

examples/EvaluationDataToApplicationInsights/Pages/Checkout.cshtml

@@ -0,0 +1,12 @@
+@page
+@model CheckoutModel
+@{
+    ViewData["Title"] = "Checkout";
+}
+<h1>@ViewData["Title"]</h1>
+
+<p>Click Below To Check Out!</p>
+
+<button id="checkout" name="checkout" onclick="appInsights.trackEvent({ name: 'checkout', properties: { 'success' : 'yes' } }); appInsights.trackMetric({ name: 'checkoutAmount', average: Math.floor(Math.random() * 100) }); alert('Checked Out!');">
+    Check Out
+</button>

examples/EvaluationDataToApplicationInsights/Pages/Checkout.cshtml.cs

@@ -0,0 +1,8 @@
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace EvaluationDataToApplicationInsights.Pages
+{
+    public class CheckoutModel : PageModel
+    {
+    }
+}

examples/EvaluationDataToApplicationInsights/Pages/Error.cshtml

@@ -0,0 +1,26 @@
+@page
+@model ErrorModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to the <strong>Development</strong> environment displays detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>

examples/EvaluationDataToApplicationInsights/Pages/Error.cshtml.cs

@@ -0,0 +1,27 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Diagnostics;
+
+namespace EvaluationDataToApplicationInsights.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    [IgnoreAntiforgeryToken]
+    public class ErrorModel : PageModel
+    {
+        public string RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        private readonly ILogger<ErrorModel> _logger;
+
+        public ErrorModel(ILogger<ErrorModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+}

examples/EvaluationDataToApplicationInsights/Pages/Index.cshtml

@@ -0,0 +1,72 @@
+@page
+@model IndexModel
+@{
+    ViewData["Title"] = "Home page";
+}
+
+<div class="text-center mb-40">
+    <h1 class="display-4">Welcome, @Model.Username !</h1>
+</div>
+
+<div class="text-center">
+    <div style="display:inline-block;width:500px;">
+        <img class="mb-40" src="@ViewData["ImageUri"]" />
+        <div class="panel panel-primary">
+            <div class="panel-heading">
+                <h3 class="panel-title">
+                    <span class="glyphicon glyphicon-arrow-right"></span>Rate the image on a scale of 1 - 5 !<span class="glyphicon glyphicon-new-window"></span></a>
+                </h3>
+            </div>
+            <form action="/" method="post">
+                <div class="panel-body mb-5">
+                    <ul class="list-group">
+                        <li class="list-group-item">
+                            <div class="radio">
+                                <label>
+                                    <input type="radio" name="imageScore" value="5">
+                                    5
+                                </label>
+                            </div>
+                        </li>
+                        <li class="list-group-item">
+                            <div class="radio">
+                                <label>
+                                    <input type="radio" name="imageScore" value="4">
+                                    4
+                                </label>
+                            </div>
+                        </li>
+                        <li class="list-group-item">
+                            <div class="radio">
+                                <label>
+                                    <input type="radio" name="imageScore" value="3">
+                                    3
+                                </label>
+                            </div>
+                        </li>
+                        <li class="list-group-item">
+                            <div class="radio">
+                                <label>
+                                    <input type="radio" name="imageScore" value="2">
+                                    2
+                                </label>
+                            </div>
+                        </li>
+                        <li class="list-group-item">
+                            <div class="radio">
+                                <label>
+                                    <input type="radio" name="imageScore" value="1">
+                                    1
+                                </label>
+                            </div>
+                        </li>
+                    </ul>
+                </div>
+                @Html.AntiForgeryToken()
+                <div class="panel-footer">
+                    <input type="submit" class="btn btn-primary btn-sm" value="Vote" />
+                </div>
+            </form>
+        </div>
+    </div>
+</div>

examples/EvaluationDataToApplicationInsights/Pages/Index.cshtml.cs

@@ -0,0 +1,66 @@
+using Microsoft.ApplicationInsights;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.FeatureManagement;
+
+namespace EvaluationDataToApplicationInsights.Pages
+{
+    public class IndexModel : PageModel
+    {
+        private readonly IVariantFeatureManager _featureManager;
+        private readonly TelemetryClient _telemetry;
+
+        public string Username { get; set; }
+
+        public IndexModel(
+            IVariantFeatureManager featureManager,
+            TelemetryClient telemetry)
+        {
+            _featureManager = featureManager ?? throw new ArgumentNullException(nameof(featureManager));
+            _telemetry = telemetry ?? throw new ArgumentNullException(nameof(telemetry));
+        }
+
+        public async Task<IActionResult> OnGet()
+        {
+            Username = Request.Cookies["username"];
+
+            if (string.IsNullOrEmpty(Username))
+            {
+                return Redirect("/RandomizeUser");
+            }
+
+            //
+            // Use application's feature manager to get assigned variant for current user
+            Variant variant = await _featureManager
+                .GetVariantAsync("ImageRating", HttpContext.RequestAborted);
+
+            //
+            // Set the page's display image based on the assigned variant.
+            ViewData["ImageUri"] = variant.Configuration.Value;
+
+            return Page();
+        }
+
+        public IActionResult OnPost()
+        {
+            if (Request.Form != null)
+            {
+                string val = Request.Form["imageScore"];
+
+                if (val != null && 
+                    int.TryParse(val, out int rating))
+                {
+                    _telemetry.TrackEvent(
+                        "Vote",
+                        properties: null,
+                        metrics: new Dictionary<string, double>
+                        {
+                            { "ImageRating", rating }
+                        });
+                }
+            }
+
+            return Redirect("/RandomizeUser");
+        }
+    }
+}

examples/EvaluationDataToApplicationInsights/Pages/RandomizeUser.cshtml

@@ -0,0 +1,4 @@
+@page
+@model EvaluationDataToApplicationInsights.Pages.RandomizeUserModel
+@{
+}

examples/EvaluationDataToApplicationInsights/Pages/RandomizeUser.cshtml.cs

@@ -0,0 +1,18 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace EvaluationDataToApplicationInsights.Pages
+{
+    public class RandomizeUserModel : PageModel
+    {
+        public IActionResult OnGet()
+        {
+            // Clear Application Insights cookies and generate new username
+            Response.Cookies.Delete("ai_user");
+            Response.Cookies.Delete("ai_session");
+            Response.Cookies.Append("username", Random.Shared.Next().ToString());
+
+            return RedirectToPage("/Index");
+        }
+    }
+}