Silverlight 用DependencyProperty 为 自定义控 件定义属性

<UserControl x:Class="SilverlightCreate.SilverlightButtons"
    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"
    mc:Ignorable="d"
    d:DesignHeight="24" d:DesignWidth="75">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <StackPanel x:Name="myButton" Orientation="Horizontal" >
            <Image x:Name="myImg"  />
            <TextBlock x:Name="myText" VerticalAlignment="Center" />
        </StackPanel>
    </Grid>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Media.Imaging;

namespace SilverlightCreate
{
    public partial class SilverlightButtons : UserControl
    {
        public SilverlightButtons()
        {
            InitializeComponent();
        }


        /// <summary>
        /// 自定义button的文本
        /// </summary>
        public string Contents
        {
            get { return (string)GetValue(ContentsProperty); }
            set { SetValue(ContentsProperty, value); }
        }

        /// <summary>
        /// 自定义button的Icon
        /// </summary>
        public ImageSource IconSource
        {
            get { return (ImageSource)GetValue(IconSourceProperty); }
            set { SetValue(IconSourceProperty, value); }
        }

        /// <summary>
        /// 自定义button背景颜色
        /// </summary>
        public Brush ButtonBackGround
        {
            get { return (SolidColorBrush)GetValue(ButtonBackGroundProperty); }
            set { SetValue(ButtonBackGroundProperty, value); }
        }
        

        public static readonly DependencyProperty ContentsProperty = DependencyProperty.Register("Contents", typeof(string), typeof(SilverlightButtons), new PropertyMetadata(ContentsChanged));

        private static void ContentsChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            SilverlightButtons button = sender as SilverlightButtons;
            if (button != null)
            {
                if (e.NewValue != null)
                {
                    String NewValue = e.NewValue as String;
                    button.myText.Text = NewValue;
                }
            }
            else
            {
                button.myText.Text = String.Empty;
            }
        }

        public static readonly DependencyProperty IconSourceProperty = DependencyProperty.Register("IconSource", typeof(ImageSource), typeof(SilverlightButtons), new PropertyMetadata(IconSourceSourceChanged));

        private static void IconSourceSourceChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            SilverlightButtons button = sender as SilverlightButtons;
            if (button != null)
            {
                if (e.NewValue != null)
                {
                    ImageSource source = e.NewValue as ImageSource;
                    button.myImg.Source = source;
                }
            }
            else
            {
                button.myImg.Source = null;
            }
        }

        public static readonly DependencyProperty ButtonBackGroundProperty = DependencyProperty.Register("ButtonBackGround", typeof(Brush), typeof(SilverlightButtons), new PropertyMetadata(ButtonBackGroundChanged));

        private static void ButtonBackGroundChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            SilverlightButtons button = sender as SilverlightButtons;
            if (button != null)
            {
                if (e.NewValue != null)
                {
                    SolidColorBrush brush = e.NewValue as SolidColorBrush;
                    button.myButton.Background = brush;
                }
            }
            else
            {
                button.myButton.Background = null;
            }
        }

    }
}

<UserControl x:Class="SilverlightCreate.SilverlightButton"
    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:custom="clr-namespace:SilverlightCreate"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">
    
    <Grid x:Name="LayoutRoot" Background="White">
        <custom:SilverlightButtons   Contents="test" IconSource="images/tool_chonghua.png" x:Name="silverlightButtons1" VerticalAlignment="Top" Height="27" Width="75"  />
    </Grid>
</UserControl>