//定义依赖属性，类必须继承 DependencyObject
    public class Student : DependencyObject
    {
        //定义依赖属性 Name+Property为后缀
        public static readonly DependencyProperty NameProperty = 
                                DependencyProperty.Register("Name",typeof(string),typeof(Student));
    }

调用

            Student s = new Student();
            s.SetValue(Student.NameProperty,"111");
            TextBox1.SetValue(TextBox.TextProperty,s.GetValue(Student.NameProperty));

一、用户控件 依赖属性

效果：动画数字从100到200

代码：

1、用户控件 ShowNumberControl

<UserControl x:Class="WpfApplication1.ShowNumberControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Label x:Name="numberDisplay" Height="50" Width="200" Background="LightBlue"/>
    </Grid>
</UserControl>

using System;
using System.Collections.Generic;
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 WpfApplication1
{
    /// <summary>
    /// ShowNumberControl.xaml 的交互逻辑
    /// </summary>
    public partial class ShowNumberControl : UserControl
    {
        public ShowNumberControl()
        {
            InitializeComponent();
        }

        public int CurrentNumber
        {
            get { return (int)GetValue(CurrentNumberProperty); }
            set { SetValue(CurrentNumberProperty,value); }
        }

        //依赖属性
        public static readonly DependencyProperty CurrentNumberProperty =
            DependencyProperty.Register("CurrentNumber",typeof(int),typeof(ShowNumberControl),new UIPropertyMetadata(100,new PropertyChangedCallback(CurrentNumberChanged)),new ValidateValueCallback(ValidateCurrentNumber)
            );

        //验证值
        public static bool ValidateCurrentNumber(object value)
        {
            if (Convert.ToInt32(value) >= 0 && Convert.ToInt32(value) <= 500)
                return true;
            else
                return false;
        }

        //当前数字改变后
        public static void CurrentNumberChanged(DependencyObject d,DependencyPropertyChangedEventArgs e)
        {
            ShowNumberControl c = (ShowNumberControl)d;
            Label theLabel = c.numberDisplay;
            theLabel.Content = e.NewValue.ToString();
        }

        
    }
}

<Window x:Class="WpfApplication1.Window3"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:myControl="clr-namespace:WpfApplication1"
Title="Window3" Height="300" Width="300">
<Grid>
<myControl:ShowNumberControl x:Name="myShowNumberControl" CurrentNumber="100"> <myControl:ShowNumberControl.Triggers> <EventTrigger RoutedEvent="myControl:ShowNumberControl.Loaded"> <BeginStoryboard> <Storyboard TargetProperty="CurrentNumber"> <Int32Animation From="100" To="200" Duration="0:0:10"/> </Storyboard> </BeginStoryboard> </EventTrigger> </myControl:ShowNumberControl.Triggers> </myControl:ShowNumberControl> </Grid> </Window>