发现了好东西,把使用方法记个流水账,供将来使用

创建工程

创建个C# Core 工程

dotnet new console -o xamltest
cd xamltest

添加Avalonia包

dotnet add package Avalonia
dotnet add package Avalonia.Desktop
dotnet add package Avalonia.ReactiveUI
# 在linux下运行需要额外添加下面这个包,如果只想在windows下运行可以不用:
dotnet add package SkiaSharp.NativeAssets.Linux

编辑文件(如果没有的文件自己创建)

工程.csproj里面添加一些配置

  <ItemGroup>
    <Folder Include="Models\" />
    <Compile Update="**\*.xaml.cs">
      <DependentUpon>%(Filename)</DependentUpon>
    </Compile>
    <AvaloniaResource Include="**\*.xaml">
      <SubType>Designer</SubType>
    </AvaloniaResource>
    <AvaloniaResource Include="Assets\**" />
  </ItemGroup>

编辑Program.cs

using System;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Controls.Templates;
using Avalonia.Logging.Serilog;
using Avalonia.Markup.Xaml;
using Avalonia.ReactiveUI;
using ReactiveUI;

namespace xamltest
{
	public class ViewLocator : IDataTemplate
	{
		public bool SupportsRecycling => false;

		public IControl Build(object data)
		{
			var name = data.GetType().FullName.Replace("ViewModel", "View");
			var type = Type.GetType(name);
			return (type != null) ? (Control)Activator.CreateInstance(type) : new TextBlock { Text = "Not Found: " + name };
		}

		public bool Match(object data) => data is ReactiveObject;
	}

	public class App : Application
	{
		public override void Initialize() => AvaloniaXamlLoader.Load(this);

		public override void OnFrameworkInitializationCompleted()
		{
			if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) desktop.MainWindow = new MainWindow { DataContext = new MainWindowViewModel(), };
			base.OnFrameworkInitializationCompleted();
		}
	}
	class Program
	{
		public static void Main(string[] args) => AppBuilder.Configure<App>().UsePlatformDetect().LogToDebug().UseReactiveUI().StartWithClassicDesktopLifetime(args);
	}
}

编辑App.xaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:xamltest"
             x:Class="xamltest.App">
    <Application.DataTemplates>
        <local:ViewLocator/>
    </Application.DataTemplates>

    <Application.Styles>
        <StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml"/>
        <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseLight.xaml"/>
    </Application.Styles>
</Application>

编辑MainWindow.xaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="clr-namespace:MyApp.ViewModels;assembly=MyApp"
        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="xamltest.MainWindow"
        Title="MainWindow">

    <Design.DataContext>
        <vm:MainWindowViewModel/>
    </Design.DataContext>
		<StackPanel>
    <TextBlock Text="{Binding Greeting}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
		<Button Width="100">按钮</Button>
		</StackPanel>
</Window>

编辑MainWindow.xaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;
using ReactiveUI;

namespace xamltest
{
	public class MainWindowViewModel : ReactiveObject
	{
		public string Greeting => "Hello World!";
	}

	public class MainWindow : Window
	{
		private void InitializeComponent() => AvaloniaXamlLoader.Load(this);
		public MainWindow()
		{
			InitializeComponent();
		}
	}
}

接下来就能dotnet run运行了.

更多资料

https://github.com/AvaloniaUI/Avalonia
https://github.com/AvaloniaUI/avalonia-dotnet-templates

Avalonia + Netcore + VSCode 把WPF带到Linux下