#160 Property exception handling

TestApplications/TestApplications.sln

@@ -1,12 +1,14 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.30011.22
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34607.119
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WpfApplication", "src\WpfApplication\WpfApplication.csproj", "{C8276299-FA43-409B-A969-EF030AB56224}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Notifier", "src\Notifier\Notifier.csproj", "{483A4AB8-F697-46CB-B82E-6CAB3D525D87}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AvaloniaApplication", "src\AvaloniaApplication\AvaloniaApplication.csproj", "{6A3A5D94-EDCD-4330-8BB4-C9A472ACD874}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -21,6 +23,10 @@ Global
 		{483A4AB8-F697-46CB-B82E-6CAB3D525D87}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{483A4AB8-F697-46CB-B82E-6CAB3D525D87}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{483A4AB8-F697-46CB-B82E-6CAB3D525D87}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6A3A5D94-EDCD-4330-8BB4-C9A472ACD874}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6A3A5D94-EDCD-4330-8BB4-C9A472ACD874}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6A3A5D94-EDCD-4330-8BB4-C9A472ACD874}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6A3A5D94-EDCD-4330-8BB4-C9A472ACD874}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

TestApplications/src/AvaloniaApplication/App.axaml

@@ -0,0 +1,10 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="AvaloniaApplication.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+</Application>

TestApplications/src/AvaloniaApplication/App.axaml.cs

@@ -0,0 +1,34 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Data.Core;
+using Avalonia.Data.Core.Plugins;
+using Avalonia.Markup.Xaml;
+using AvaloniaApplication.ViewModels;
+using AvaloniaApplication.Views;
+
+namespace AvaloniaApplication
+{
+    public partial class App : Application
+    {
+        public override void Initialize()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+
+        public override void OnFrameworkInitializationCompleted()
+        {
+            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            {
+                // Line below is needed to remove Avalonia data validation.
+                // Without this line you will get duplicate validations from both Avalonia and CT
+                BindingPlugins.DataValidators.RemoveAt(0);
+                desktop.MainWindow = new MainWindow
+                {
+                    DataContext = new MainWindowViewModel(),
+                };
+            }
+
+            base.OnFrameworkInitializationCompleted();
+        }
+    }
+}

TestApplications/src/AvaloniaApplication/AvaloniaApplication.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Models\" />
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.0.9" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.0.9" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.9" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.9" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.0.9" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" />
+  </ItemGroup>
+</Project>

TestApplications/src/AvaloniaApplication/Program.cs

@@ -0,0 +1,22 @@
+using Avalonia;
+using System;
+
+namespace AvaloniaApplication
+{
+    internal class Program
+    {
+        // Initialization code. Don't use any Avalonia, third-party APIs or any
+        // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+        // yet and stuff might break.
+        [STAThread]
+        public static void Main(string[] args) => BuildAvaloniaApp()
+            .StartWithClassicDesktopLifetime(args);
+
+        // Avalonia configuration, don't remove; also used by visual designer.
+        public static AppBuilder BuildAvaloniaApp()
+            => AppBuilder.Configure<App>()
+                .UsePlatformDetect()
+                .WithInterFont()
+                .LogToTrace();
+    }
+}

TestApplications/src/AvaloniaApplication/Properties/PublishProfiles/FolderProfile.pubxml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net8.0\publish\win-x86\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net8.0</TargetFramework>
+    <SelfContained>false</SelfContained>
+    <RuntimeIdentifier>win-x86</RuntimeIdentifier>
+    <PublishSingleFile>true</PublishSingleFile>
+    <PublishReadyToRun>false</PublishReadyToRun>
+  </PropertyGroup>
+</Project>

TestApplications/src/AvaloniaApplication/ViewModels/MainWindowViewModel.cs

@@ -0,0 +1,7 @@
+namespace AvaloniaApplication.ViewModels
+{
+    public partial class MainWindowViewModel : ViewModelBase
+    {
+        public string Greeting => "Welcome to Avalonia!";
+    }
+}

TestApplications/src/AvaloniaApplication/ViewModels/ViewModelBase.cs

@@ -0,0 +1,8 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace AvaloniaApplication.ViewModels
+{
+    public class ViewModelBase : ObservableObject
+    {
+    }
+}

TestApplications/src/AvaloniaApplication/Views/MainWindow.axaml

@@ -0,0 +1,23 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:AvaloniaApplication.ViewModels"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="AvaloniaApplication.Views.MainWindow"
+        x:DataType="vm:MainWindowViewModel"
+        Icon="/Assets/avalonia-logo.ico"
+        Title="AvaloniaApplication">
+
+    <Design.DataContext>
+        <!-- This only sets the DataContext for the previewer in an IDE,
+             to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) -->
+        <vm:MainWindowViewModel/>
+    </Design.DataContext>
+
+    <TextBlock Text="{Binding Greeting}" 
+               AutomationProperties.AutomationId="Greetings"
+               HorizontalAlignment="Center" 
+               VerticalAlignment="Center"/>
+
+</Window>

TestApplications/src/AvaloniaApplication/Views/MainWindow.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+
+namespace AvaloniaApplication.Views
+{
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}

TestApplications/src/AvaloniaApplication/app.manifest

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embeded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="AvaloniaApplication.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>

src/FlaUILibrary/flaui/module/element.py

@@ -2,7 +2,8 @@
 from enum import Enum
 from typing import Optional, Any
 from System import Exception as CSharpException  # pylint: disable=import-error
-from FlaUI.Core import Debug as FlaUIDebug # pylint: disable=import-error
+from FlaUI.Core import Debug as FlaUIDebug  # pylint: disable=import-error
+from FlaUI.Core.Exceptions import PropertyNotSupportedException  # pylint: disable=import-error
 from FlaUILibrary.flaui.util.converter import Converter
 from FlaUILibrary.flaui.exception import FlaUiError
 from FlaUILibrary.flaui.interface import (ModuleInterface, ValueContainer)
@@ -61,7 +62,7 @@ def __init__(self, automation: Any, timeout: int = 1000):
         self._timeout = timeout
 
     @staticmethod
-    def create_value_container(name=None, xpath=None, retries=None, use_exception=None,  msg=None):
+    def create_value_container(name=None, xpath=None, retries=None, use_exception=None, msg=None):
         """
         Helper to create container object.
 
@@ -98,7 +99,7 @@ def execute_action(self, action: Action, values: Container):
                 lambda: self._get_name_from_element(values["xpath"]),
             self.Action.GET_ELEMENT_RECTANGLE_BOUNDING:
                 lambda: self._get_rectangle_bounding_from_element(
-                values["xpath"]),
+                    values["xpath"]),
             self.Action.IS_ELEMENT_ENABLED:
                 lambda: self._get_element(values["xpath"]).IsEnabled,
             self.Action.NAME_SHOULD_BE:
@@ -229,9 +230,9 @@ def _find_all_elements(self, xpath: str):
         elements = self._get_all_elements_by_xpath(xpath)
         for element in elements:
             values.append(AutomationElement(
-                element.AutomationId,
-                element.Name,
-                element.ClassName,
+                self._try_get_automation_id_property(element),
+                self._try_get_name_property(element),
+                self._try_get_classname_property(element),
                 FlaUIDebug.GetXPathToElement(element)
             ))
 
@@ -456,3 +457,42 @@ def _set_timeout(self, timeout: int):
             timeout (Number): Timeout value in seconds
         """
         self._timeout = timeout
+
+    @staticmethod
+    def _try_get_automation_id_property(element):
+        """
+        Try to get automation id property from element. Return empty string if failed.
+
+        Args:
+            element (UIA): AutomationElement.
+        """
+        try:
+            return element.AutomationId
+        except PropertyNotSupportedException:
+            return ""
+
+    @staticmethod
+    def _try_get_name_property(element):
+        """
+        Try to get name property from element. Return empty string if failed.
+
+        Args:
+            element (UIA): AutomationElement.
+        """
+        try:
+            return element.Name
+        except PropertyNotSupportedException:
+            return ""
+
+    @staticmethod
+    def _try_get_classname_property(element):
+        """
+        Try to get class name property from element. Return empty string if failed.
+
+        Args:
+            element (UIA): AutomationElement.
+        """
+        try:
+            return element.ClassName
+        except PropertyNotSupportedException:
+            return ""