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This commit is contained in:
Matthias Heil
2026-04-04 13:30:13 +02:00
commit 6bed9b284c
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CSharp/Applications/AvaloniaLog4NetDI/App.axaml
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<Application x:Class="AvaloniaLog4NetDI.App"
xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:AvaloniaLog4NetDI">
<Application.DataTemplates>
<local:ViewLocator/>
</Application.DataTemplates>
<Application.Styles>
<FluentTheme Mode="Light"/>
<StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Fluent.xaml"/>
</Application.Styles>
</Application>
CSharp/Applications/AvaloniaLog4NetDI/App.axaml.cs
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using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Data.Core;
using Avalonia.Data.Core.Plugins;
using Avalonia.Markup.Xaml;
using AvaloniaLog4NetDI.ViewModels;
using AvaloniaLog4NetDI.Views;
using Log4Net.Appender.LogView.Core;
using LogViewer.Avalonia;
using MessageBox.Avalonia;
using MessageBox.Avalonia.Enums;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using RandomLogging.Service;
using System;
using System.Reflection;
using System.Threading;
using Icon = MessageBox.Avalonia.Enums.Icon;
namespace AvaloniaLog4NetDI;
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
ExpressionObserver.DataValidators.RemoveAll(x => x is DataAnnotationsValidationPlugin);
// catch all unhandled errors
AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
HostApplicationBuilder builder = Host.CreateApplicationBuilder();
builder
/*
* Note: For information on launch profiles for debugging,
* see article: https://www.codeproject.com/Articles/5354478/NET-App-Settings-Demystified-Csharp-VB
*/
// Register the Random Logging Service
.AddRandomBackgroundService()
// visual debugging tools
.AddLogViewer()
// Log4Net
.Logging.AddLog4Net(builder.Configuration);
// uncomment to use custom logging colors (note: System.Drawing namespace)
//
//.Logging.AddLog4Net(
// builder.Configuration,
// options =>
//{
// options.Colors[LogLevel.Trace] = new()
// {
// Foreground = Color.White,
// Background = Color.DarkGray
// };
// options.Colors[LogLevel.Debug] = new()
// {
// Foreground = Color.White,
// Background = Color.Gray
// };
// options.Colors[LogLevel.Information] = new()
// {
// Foreground = Color.White,
// Background = Color.DodgerBlue
// };
// options.Colors[LogLevel.Warning] = new()
// {
// Foreground = Color.White,
// Background = Color.Orchid
// };
//});
IServiceCollection services = builder.Services;
services
.AddSingleton<MainViewModel>()
.AddSingleton<MainWindow>(service => new MainWindow
{
DataContext = service.GetRequiredService<MainViewModel>()
});
_host = builder.Build();
_cancellationTokenSource = new();
try
{
LogStartingMode();
// set and show
desktop.MainWindow = _host.Services.GetRequiredService<MainWindow>();
desktop.ShutdownRequested += OnShutdownRequested;
// startup background services
_ = _host.StartAsync(_cancellationTokenSource.Token);
}
catch (OperationCanceledException)
{
// skip
}
catch (Exception ex)
{
ShowMessageBox("Unhandled Error", ex.Message);
return;
}
}
base.OnFrameworkInitializationCompleted();
}
private void OnShutdownRequested(object? sender, ShutdownRequestedEventArgs e)
=> _ = _host!.StopAsync(_cancellationTokenSource!.Token);
#region Fields
private IHost? _host;
private CancellationTokenSource? _cancellationTokenSource;
#endregion
private void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
=> ShowMessageBox("Unhandled Error", ((Exception)e.ExceptionObject).Message);
private void ShowMessageBox(string title, string message)
{
MessageBox.Avalonia.BaseWindows.Base.IMsBoxWindow<ButtonResult> messageBoxStandardWindow = MessageBoxManager
.GetMessageBoxStandardWindow(title, message, ButtonEnum.Ok, Icon.Stop);
messageBoxStandardWindow.Show();
}
private void LogStartingMode()
{
// Get the Launch mode
bool isDevelopment = string.Equals(Environment.GetEnvironmentVariable("DOTNET_MODIFIABLE_ASSEMBLIES"), "debug",
StringComparison.InvariantCultureIgnoreCase);
// initialize a logger & EventId
ILogger<App> logger = _host!.Services.GetRequiredService<ILogger<App>>();
EventId eventId = new EventId(id: 0, name: Assembly.GetEntryAssembly()!.GetName().Name);
// log a test pattern for each log level
logger.TestPattern(eventId: eventId);
// log that we have started...
logger.Emit(eventId, LogLevel.Information, $"Running in {(isDevelopment ? "Debug" : "Release")} mode");
}
}
CSharp/Applications/AvaloniaLog4NetDI/AvaloniaLog4NetDI.csproj
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>net7.0</TargetFramework>
<Nullable>enable</Nullable>
<BuiltInComInteropSupport>true</BuiltInComInteropSupport>
<ApplicationManifest>app.manifest</ApplicationManifest>
</PropertyGroup>
<ItemGroup>
<Content Include="appsettings.Development.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
<Content Include="appsettings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
<Content Include="appsettings.Production.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
<ItemGroup>
<TrimmerRootAssembly Include="Avalonia.Themes.Fluent" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="MessageBox.Avalonia" Version="2.1.0" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\..\..\Resources\Avalonia.Resources\Avalonia.Resources.vbproj" />
<ProjectReference Include="..\..\Background Services\RandomLogging.Service\RandomLogging.Service.csproj" />
<ProjectReference Include="..\..\Controls\LogViewer.Avalonia\LogViewer.Avalonia.csproj" />
<ProjectReference Include="..\..\Core\Log4Net.Appender.LogView.Core\Log4Net.Appender.LogView.Core.csproj" />
</ItemGroup>
<ItemGroup>
<None Update="log4net.config">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>
CSharp/Applications/AvaloniaLog4NetDI/Program.cs
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using Avalonia;
using System;
namespace AvaloniaLog4NetDI;
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()
.LogToTrace();
}
CSharp/Applications/AvaloniaLog4NetDI/Properties/launchSettings.json
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{
"profiles": {
"Development": {
"commandName": "Project",
"environmentVariables": {
"DOTNET_ENVIRONMENT": "Development"
}
},
"Staging": {
"commandName": "Project",
"environmentVariables": {
"DOTNET_ENVIRONMENT": "Staging"
}
},
"Production": {
"commandName": "Project"
}
}
}
CSharp/Applications/AvaloniaLog4NetDI/ViewLocator.cs
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using Avalonia.Controls;
using Avalonia.Controls.Templates;
using AvaloniaLog4NetDI.ViewModels;
using System;
namespace AvaloniaLog4NetDI;
public class ViewLocator : IDataTemplate
{
public IControl Build(object data)
{
string name = data.GetType().FullName!.Replace("ViewModel", "View");
Type? type = Type.GetType(name);
if (type != null)
{
return (Control)Activator.CreateInstance(type)!;
}
return new TextBlock { Text = "Not Found: " + name };
}
public bool Match(object data)
{
return data is ViewModelBase;
}
}
CSharp/Applications/AvaloniaLog4NetDI/ViewModels/MainViewModel.cs
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using LogViewer.Core.ViewModels;
namespace AvaloniaLog4NetDI.ViewModels;
public class MainViewModel : ViewModelBase
{
#region Constructor
public MainViewModel(LogViewerControlViewModel logViewer)
{
LogViewer = logViewer;
}
#endregion
#region Properties
public LogViewerControlViewModel LogViewer { get; }
#endregion
}
CSharp/Applications/AvaloniaLog4NetDI/ViewModels/ViewModelBase.cs
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using CommunityToolkit.Mvvm.ComponentModel;
namespace AvaloniaLog4NetDI.ViewModels;
public class ViewModelBase : ObservableObject
{
}
CSharp/Applications/AvaloniaLog4NetDI/Views/MainWindow.axaml
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<Window x:Class="AvaloniaLog4NetDI.Views.MainWindow"
xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="Window"
xmlns:control="clr-namespace:LogViewer.Avalonia;assembly=LogViewer.Avalonia"
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"
Title="C# AVALONIA | LOG4NET LogViewer Control Example - Dot Net 7.0"
Icon="avares://Avalonia.Resources/Assets/avalonia-logo.ico"
WindowStartupLocation="CenterScreen" Height="634" Width="600">
<control:LogViewerControl DataContext="{Binding LogViewer}" />
</Window>
CSharp/Applications/AvaloniaLog4NetDI/Views/MainWindow.axaml.cs
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using Avalonia.Controls;
namespace AvaloniaLog4NetDI.Views;
public partial class MainWindow : Window
{
public MainWindow() => InitializeComponent();
}
CSharp/Applications/AvaloniaLog4NetDI/app.manifest
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<?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="AvaloniaTest.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>
CSharp/Applications/AvaloniaLog4NetDI/appsettings.Development.json
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{
"Logging": {
"LogLevel": {
"Default": "Trace",
"System.Net.Http.HttpClient": "Trace"
}
},
"Log4NetCore": {
"Name": "Log4NetLogViewer_Dev",
"LoggerRepository": "LogViewerRepository",
"OverrideCriticalLevelWith": "Critical",
"Watch": false,
"UseWebOrAppConfig": false,
"PropertyOverrides": [
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/layout/conversionPattern",
"Attributes": {
"Value": "%date [%thread] %-5level | %logger | %message%newline"
}
},
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/threshold",
"Attributes": {
"Value": "Trace"
}
},
{
"XPath": "/log4net/appender[@name='DataStoreLogger']/threshold",
"Attributes": {
"Value": "Trace"
}
}
]
}
}
CSharp/Applications/AvaloniaLog4NetDI/appsettings.Production.json
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{
"Logging": {
"LogLevel": {
"Default": "Trace",
"System.Net.Http.HttpClient": "Trace"
}
},
"Log4NetCore": {
"Name": "Log4NetLogViewer_Prod",
"LoggerRepository": "LogViewerRepository",
"OverrideCriticalLevelWith": "Critical",
"Watch": false,
"UseWebOrAppConfig": false,
"PropertyOverrides": [
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/layout/conversionPattern",
"Attributes": {
"Value": "%date [%thread] %-5level | %logger | %message%newline"
}
},
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/threshold",
"Attributes": {
"Value": "Warn"
}
},
{
"XPath": "/log4net/appender[@name='DataStoreLogger']/threshold",
"Attributes": {
"Value": "Warn"
}
}
]
}
}
CSharp/Applications/AvaloniaLog4NetDI/appsettings.json
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{
"Logging": {
"LogLevel": {
"Default": "Information",
"System.Net.Http.HttpClient": "Information"
}
},
"Log4NetCore": {
"Name": "Log4NetLogViewer_default",
"LoggerRepository": "LogViewerRepository",
"OverrideCriticalLevelWith": "Critical",
"Watch": false,
"UseWebOrAppConfig": false,
"PropertyOverrides": [
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/layout/conversionPattern",
"Attributes": {
"Value": "%date [%thread] %-5level | %logger | %message%newline"
}
},
{
"XPath": "/log4net/appender[@name='ConsoleAppender']/threshold",
"Attributes": {
"Value": "Info"
}
},
{
"XPath": "/log4net/appender[@name='DataStoreLogger']/threshold",
"Attributes": {
"Value": "Info"
}
}
]
}
}
CSharp/Applications/AvaloniaLog4NetDI/log4net.config
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<?xml version="1.0" encoding="utf-8" ?>
<log4net>
<appender name="DebugAppender" type="log4net.Appender.DebugAppender" >
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<threshold value="ALL" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="DataStoreLogger" type="Log4Net.Appender.LogView.Core.DataStoreLoggerServiceAppender">
<threshold value="ALL" />
</appender>
<root>
<Level value="ALL" />
<appender-ref ref="DebugAppender" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="DataStoreLogger" />
</root>
</log4net>