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Fix CollectionView Header is not visible when ItemsSource is not set and an EmptyView is set in iOS, Mac platform#34989

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kubaflo merged 9 commits into
dotnet:inflight/currentfrom
KarthikRajaKalaimani:fix-34897
Apr 16, 2026
Merged

Fix CollectionView Header is not visible when ItemsSource is not set and an EmptyView is set in iOS, Mac platform#34989
kubaflo merged 9 commits into
dotnet:inflight/currentfrom
KarthikRajaKalaimani:fix-34897

Additional scenario added in test case and improved the fix.

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maui-pr / Run Helix Unit Tests / Windows Helix Unit Tests (Debug) / 🛠️ Build BuildTasks

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    ❌src\Core\src\Platform\Windows\RootNavigationView.cs(285,37): error CS1061: 'MauiToolbar' does not contain a definition for 'HasMenuBarContent' and no accessible extension method 'HasMenuBarContent' accepting a first argument of type 'MauiToolbar' could be found (are you missing a using directive or an assembly reference?)
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Debug\net10.0-windows10.0.19041.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Debug\net10.0-windows10.0.19041.0\\output.json"" exited with code 1.
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Debug\net10.0-windows10.0.20348.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Debug\net10.0-windows10.0.20348.0\\output.json"" exited with code 1.

maui-pr / Run Helix Unit Tests / Windows Helix Unit Tests (Release) / 🛠️ Build BuildTasks

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    ❌src\Core\src\Platform\Windows\RootNavigationView.cs(285,37): error CS1061: 'MauiToolbar' does not contain a definition for 'HasMenuBarContent' and no accessible extension method 'HasMenuBarContent' accepting a first argument of type 'MauiToolbar' could be found (are you missing a using directive or an assembly reference?)
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.19041.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.19041.0\\output.json"" exited with code 1.
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.20348.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.20348.0\\output.json"" exited with code 1.

maui-pr / Pack .NET MAUI / Pack Windows / Pack & Publish

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    ❌src\Core\src\Platform\Windows\RootNavigationView.cs(285,37): error CS1061: 'MauiToolbar' does not contain a definition for 'HasMenuBarContent' and no accessible extension method 'HasMenuBarContent' accepting a first argument of type 'MauiToolbar' could be found (are you missing a using directive or an assembly reference?)
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.19041.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.19041.0\\output.json"" exited with code 1.
    ❌.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\Microsoft.UI.Xaml.Markup.Compiler.interop.targets(845,9): error MSB3073: The command ""D:\a\_work\1\s\.packages\microsoft.windowsappsdk.winui\1.8.251105000\buildTransitive\..\tools\net6.0\..\net472\XamlCompiler.exe" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.20348.0\\input.json" "D:\a\_work\1\s\artifacts\obj\Core\Release\net10.0-windows10.0.20348.0\\output.json"" exited with code 1.

42 other jobs are failing and were not displayed due to space limitations.
Builds with failures: [maui-pr] [maui-pr-uitests]

Known test errors

Test Failures (915 tests failed)

🔹 [All failing tests from maui-pr-uitests]

    ⚠️ 910 failing tests not displayed for this pipeline due to space limitations

    ❌ Maui.Controls.TestCases.Tests.Issues.Issue33227(iOS).ShellColorsResetOnNavigation [Details] [5.59% failure rate]
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    Failing Configuration
    Exception Message
    VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: ShellColorsResetOnNavigation.png (1.11% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

    More info: https://aka.ms/visual-test-workflow

    CallStack
       at VisualTestUtils.VisualRegressionTester.Fail(String message) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 162
   at VisualTestUtils.VisualRegressionTester.VerifyMatchesSnapshot(String name, ImageSnapshot actualImage, String environmentName, ITestContext testContext) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 123
   at Microsoft.Maui.TestCases.Tests.UITest.<VerifyScreenshot>g__Verify|13_0(String name, <>c__DisplayClass13_0&) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 477
   at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 309
   at Maui.Controls.TestCases.Tests.Issues.Issue33227.ShellColorsResetOnNavigation() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue33227.cs:line 33
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
    ❌ Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests(iOS).VerifyAbsoluteLayout_AllProportional [Details] [21.96% failure rate]
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    Failing Configuration
    Exception Message
    VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: VerifyAbsoluteLayout_AllProportional.png (0.68% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

    More info: https://aka.ms/visual-test-workflow

    CallStack
       at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 296
   at Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests.VerifyAbsoluteLayout_AllProportional() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/AbsoluteLayoutFeatureTests.cs:line 290
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
    ❌ Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests(iOS).VerifyAbsoluteLayout_FlowDirection [Details] [21.97% failure rate]
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    Failing Configuration
    Exception Message
    VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: VerifyAbsoluteLayout_FlowDirection.png (0.60% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

    More info: https://aka.ms/visual-test-workflow

    CallStack
       at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 296
   at Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests.VerifyAbsoluteLayout_FlowDirection() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/AbsoluteLayoutFeatureTests.cs:line 336
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
    ❌ Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests(iOS).VerifyAbsoluteLayout_HeightProportional [Details] [21.97% failure rate]
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    Failing Configuration
    Exception Message
    VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: VerifyAbsoluteLayout_HeightProportional.png (0.60% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

    More info: https://aka.ms/visual-test-workflow

    CallStack
       at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 296
   at Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests.VerifyAbsoluteLayout_HeightProportional() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/AbsoluteLayoutFeatureTests.cs:line 206
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
    ❌ Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests(iOS).VerifyAbsoluteLayout_LayoutBounds [Details] [21.96% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]

    Failing Configuration
    Exception Message
    VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: VerifyAbsoluteLayout_LayoutBounds.png (0.68% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

    More info: https://aka.ms/visual-test-workflow

    CallStack
       at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 296
   at Microsoft.Maui.TestCases.Tests.AbsoluteLayoutFeatureTests.VerifyAbsoluteLayout_LayoutBounds() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/AbsoluteLayoutFeatureTests.cs:line 53
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

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