WPF 对象属性赋值

第一种方式 Attribute=Value

（1）优缺点：

优点：简单
缺点：无法赋复杂属性

（2）具体实现：

想要实现通过属性=value值来实现 从Human类中直接给Child赋值，转换为child.name=value的效果。
需要实现两个方法的重载：
CanConvertFrom():确保xaml语言不会报语法错误
ConvertFrom()：将string赋值给human类的child.name
重写后将特性附加给Human类： [TypeConverterAttribute(typeof(NameToHumanTypeConverter))]
NameToHumanTypeConverter重写TypeConverter类

XAML：
Window.Resources通过资源将类以Key的方式存入，后在程序中以this.FindResource(key) as 类型取出

<Window x:Class="HelloWPF.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:HelloWPF" //本地名称空间
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <local:Human x:Key="human" Name="Jack" Child="Lucy"/>//名称空间有一个Human类，Key值为human
    </Window.Resources>
    <Grid>
        <Path Data="M 0,0 L 100,200 L 200,150 Z" Stroke="Black" Fill="Red" />
        <Button x:Name="btn1" Content="SHOW" Width="100" Click="btn_Click" Margin="346,140,0,0" HorizontalAlignment="Left" Height="20" VerticalAlignment="Top"/>
        <Button x:Name="btn2" Content="SHOW2" Click="btn2_Click" Margin="346,257,0,0" Height="20" VerticalAlignment="Top" HorizontalAlignment="Left" Width="100"/>
    </Grid>
</Window>

后台代码分部类：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace HelloWPF
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void btn_Click(object sender, RoutedEventArgs e)
        {
            Human human = this.FindResource("human") as Human;
            if(human!=null)
            {
                MessageBox.Show(human.Name);
            }
        }
        private void btn2_Click(object sender, RoutedEventArgs e)
        {
            Human human = this.FindResource("human") as Human;
            if (human != null)
            {
                MessageBox.Show(human.Child.Name);
            }
        }
    }
    [TypeConverterAttribute(typeof(NameToHumanTypeConverter))]
    public class Human
    {
        public string Name { get; set; }
        public Human Child { get; set; }
    }
    public class NameToHumanTypeConverter:TypeConverter
    {
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            string name = value.ToString();
            Human human = new Human();
            human.Name = name;
            return human;
        }
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (sourceType == typeof(string))
            {
                return true;
            }
            else
                return base.CanConvertFrom(context, sourceType);
        }
    }
}

效果图：点击Show出现Jack，点击Show2出现Lucy.

第二种方式 属性标签

添加复杂属性，将Button.Content更换为一个小矩形。矩形用LinearGradienBrush渐变笔刷进行绘制。

 <Button x:Name="btn3" Width="100" Height="30" Margin="230,206,462,183">
            <!--Content-->
            <Button.Content>
                <Rectangle x:Name="rectangle1" Stroke="Black" Width="20" Height="20" OpacityMask="{DynamicResource {x:Static SystemColors.InactiveBorderBrushKey}}">
                    <Rectangle.Fill>
                        <LinearGradientBrush>
                            <LinearGradientBrush.GradientStops>
                                <GradientStop Offset="0.2" Color="AliceBlue"/>
                                <GradientStop Offset="0.7" Color="Blue"/>
                                <GradientStop Offset="1" Color="Red"/>
                            </LinearGradientBrush.GradientStops>
                        </LinearGradientBrush>
                    </Rectangle.Fill>
                 </Rectangle>
            </Button.Content>
        </Button>

第三种方式 标签拓展

标签扩展 {Binding 元素名 Path} {StaticResource ResourceKey=xxx}

<Window x:Class="XAMLMarkExtension.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:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:local="clr-namespace:XAMLMarkExtension"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <sys:String x:Key="HelloWorld">HelloWPF!</sys:String>
    </Window.Resources>
    <Grid Margin="4">
        <Grid.RowDefinitions>
            <RowDefinition Height="24"/>
            <RowDefinition Height="4"/>
            <RowDefinition Height="24"/>
        </Grid.RowDefinitions>
        <TextBox x:Name="tb" Text="{Binding ElementName=sld,Path=Value}"/>
        <Slider x:Name="sld" Grid.Row="2" Value="50" Maximum="100" Minimum="0"/>
        <TextBlock Height="24" Width="120" Background="LightBlue"
                   Text="{StaticResource ResourceKey=HelloWorld}" Margin="312,260,352,-259" Grid.Row="2"/>
    </Grid>
</Window>