XAML

XAML（Extensible Application Markup Language ⁱ/ˈzæməl/)是Windows Presentation Foundation（WPF）和Universal Windows Platform(UWP)的一部分，是微软开发的一种基于XML、基于声明，用于初始化结构化值和对象的用户界面宣告式程式设计，它有着HTML的外观，又揉合了XML语法的本质，例如：可以使用<Button>标签设置按钮（Button）。它类似Linux平台下的glade。至于WinFX XAML Browser Application（XBAP）是用XAML作界面描述，在浏览器中执行的程序，可取代过去的ActiveX、Java Applet、Flash。

XAML本质上属于一种.NET编程语言，属于通用语言运行库（Common Language Runtime），同C#、VB.NET等同。与HTML类似，特点是用来描述用户界面。XAML的语法格式为：<Application... />，Application是必备的基本元素。XAML可以定义2D和3D物件、旋转（rotations）、动画（animations），以及各式各样的效果。

Hello world

C# UWP

<Page
    x:Class="UwpAppExample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UwpAppExample"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid>
        <Button Margin="10,0,10,0" Height="100" Click="Hello_Click" Content="Click Me!"/>
    </Grid>

</Page>

using System;
using Windows.UI.Xaml.Controls;
namespace UwpAppExample
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }
        private async void Button_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
        {
            await new Windows.UI.Popups.MessageDialog("Hello World!").ShowAsync();
        }
    }
}

C# WPF

<Window x:Class="WpfAppExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfAppExample"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Margin="10,0,10,0" Height="100" Click="Hello_Click" Content="Click Me!"/>
    </Grid>
</Window>

using System.Windows;

namespace WpfAppExample
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Hello_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("Hello World!");
        }
    }
}

Visual Basic dotNet

<Window x:Class="WpfAppExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfAppExample"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Margin="10,0,10,0" Height="100" Click="Hello_Click" Content="Click Me!"/>
    </Grid>
</Window>

Imports System.Windows

Class MainWindow
    Sub New()
        InitializeComponent()
    End Sub

    Private Sub Hello_Click(sender As Object, e As RoutedEventArgs)
        MessageBox.Show("Hello World!")
    End Sub
End Class

参考资料

外部链接

Microsoft XAML overview
XAMLdev.com （页面存档备份，存于互联网档案馆） A selection of categorized resources on XAML
XAML Controls from Microsoft Longhorn Developer Introduction （页面存档备份，存于互联网档案馆）
XAML used in Microsoft .NET platform （页面存档备份，存于互联网档案馆）
XAMJ, open source Java based project （页面存档备份，存于互联网档案馆）
United XAML Initiative （页面存档备份，存于互联网档案馆） - Open Source XAML Alternatives
Shaxam - LightWave to XAML converter
XAML and Technical Authors （页面存档备份，存于互联网档案馆） A discussion of the affect of the open nature of XAML.
XAML page on NetFXGuide.com A selection of categorized resources on XAML.
LearnWPF Website to learn WPX. （页面存档备份，存于互联网档案馆）
XAML Discussion Board - A great discussion board for questions on XAML and the WPF