The documentation for the MAUI Label control and its TextType property says about the type Html support in https://learn.microsoft.com/en-us/dotnet/maui/user-interface/controls/label?view=net-maui-7.0:
Displaying HTML in a Label is limited to the HTML tags that are supported by the underlying platform.
It doesn't tell what is supposed to happen if some "tags" are not supported on a platform. I see a crash of the complete MAUI application under Windows with some (as I would think) harmless p "tags" i.e. the following crashes for me on Windows:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="MauiLabelTextTypeHtmlTests.MainPage">
<ScrollView>
<VerticalStackLayout
Spacing="25"
Padding="30,0"
VerticalOptions="Center">
<Label TextType="Html"><![CDATA[<p>This is paragraph 1.<p>This is paragraph 2.]]></Label>
</VerticalStackLayout>
</ScrollView>
</ContentPage>
Is a crash the expected result if the Label control can't handle the HTML "tags"?
Why does it crash?
The remaining output console lines show a loading of XDocument, is the Label control on Windows trying to parse HTML "tags" as well-formed XML and crashes off if the HTML tags do not obey XML well-formedness rules?
The sample renders fine as two lines/paragraphs of text with MAUI under Android.
A sample output in the debug output pane for a run with above sample markup (the app window never shows up at all) is e.g.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: DefaultDomain): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.CoreLib.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\MauiLabelTextTypeHtmlTests.dll'. Symbols loaded.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\WinRT.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.InteropServices.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Collections.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Collections.Concurrent.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Threading.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.WinUI.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.CompilerServices.Unsafe.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.Uri.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.ObjectModel.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.ComponentModel.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Numerics.Vectors.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Windows.SDK.NET.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Algorithms.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Csp.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Linq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.InteractiveExperiences.Projection.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Controls.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.DependencyInjection.Abstractions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Essentials.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Controls.Xaml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Logging.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Logging.Debug.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Configuration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Configuration.Abstractions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Xml.ReaderWriter.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.Xml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Graphics.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Net.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Logging.Abstractions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.ComponentModel.TypeConverter.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Graphics.Win2D.WinUI.Desktop.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Options.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.DependencyInjection.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Diagnostics.Tracing.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Threading.ThreadPool.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Memory.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Linq.Expressions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Reflection.Emit.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'Snippets'.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Controls.Compatibility.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Reflection.Emit.Lightweight.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Reflection.Emit.ILGeneration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Reflection.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.Loader.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Text.RegularExpressions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Xml.XDocument.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.Xml.Linq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Threading.Thread.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Diagnostics.StackTrace.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Reflection.Metadata.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Collections.Immutable.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The program '[33576] MauiLabelTextTypeHtmlTests.exe' has exited with code 0 (0x0).
The debug output pane for e.g. the Label <Label TextType="Html"><![CDATA[<p>This is line 1.<br>This is line 2.<br>This is line 3.</p>]]></Label> shows the following:
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: DefaultDomain): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.CoreLib.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\MauiLabelTextTypeHtmlTests.dll'. Symbols loaded.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\WinRT.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.InteropServices.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Collections.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Collections.Concurrent.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Threading.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.WinUI.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Runtime.CompilerServices.Unsafe.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Private.Uri.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.ObjectModel.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.ComponentModel.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Numerics.Vectors.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Windows.SDK.NET.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Algorithms.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Csp.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Security.Cryptography.Primitives.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\System.Linq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.InteractiveExperiences.Projection.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Controls.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.DependencyInjection.Abstractions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Essentials.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Maui.Controls.Xaml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Logging.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Logging.Debug.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'MauiLabelTextTypeHtmlTests.exe' (CoreCLR: clrhost): Loaded 'C:\Users\marti\Source\Repos\martin-honnen\MauiLabelTextTypeHtmlTests\bin\Debug\net7.0-windows10.0.19041.0\win10-x64\AppX\Microsoft.Extensions.Configuration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
I think I have found the relevant code in https://github.com/dotnet/maui/blob/17790124c566d73001761ea93a447876e4ed0b90/src/Core/src/Platform/Windows/TextBlockExtensions.cs#L101, it first seems to wrap the HTML fragment text into a div element with e.g. var modifiedText = string.Format("<div>{0}</div>", text);, then indeed does some cosmetic regular expression replacement to be able to deal with HTML <br> tag syntax in modifiedText = Regex.Replace(modifiedText, "<br>", "<br></br>", RegexOptions.IgnoreCase); (which explains why my br sample worked) and finally indeed throws the modified HTML at an XML parser with e.g. var element = XElement.Parse(modifiedText);.
So for some strange reasons in 2022 with HTML5 and text/html being the established parsing approach for HTML for more than a decade, MAUI under Windows thinks an XML parser is adequate for HTML parsing.
Still need to figure why nothing is rendered and the app crashes/does not appear/disappears (depending on when/where you set your HTML text) as the code at least seems to want to fall back on some normal rendering of text with e.g.
try
{
var element = XElement.Parse(modifiedText);
LabelHtmlHelper.ParseText(element, platformControl.Inlines, label);
}
catch (Exception)
{
// If anything goes wrong just show the html
platformControl.Text = global::Windows.Data.Html.HtmlUtilities.ConvertToText(label.Text);
}