SL4.数据绑定--OneWay、OneTime、TwoWay

XAML：

           <Button Name="MyButton" Content="Update"  Click="MyButton_Click"  Width="65" Height="41"></Button>
            <TextBlock Height="23" Name="tbtitle" Text="{Binding Title,Mode=OneTime}" />
            <TextBlock Height="23" Name="tbtitles" Text="{Binding Title,Mode=OneWay}" />
            <TextBlock Height="23" Name="tbprice" Text="{Binding Price,Mode=TwoWay}" />

　　

XAML.CS:

       public partial class MainPage : UserControl
      {
        Book book = new Book();
        public MainPage()
        {
            InitializeComponent();
            book.Title = "CCTV-5频道";
            book.Price = 12;
            tbtitles.DataContext = book;
            tbtitle.DataContext = book;
            tbprice.DataContext = book;
        }

        private void MyButton_Click(object sender, RoutedEventArgs e)
        {
            book.Price = 44;
            book.Title = "中华电台-5频道";
        }

　　

Bool.CS:
 

    public class Book : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private string _Title;
        public string Title
        {
            get { return _Title; }
            set
            {
                _Title=value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Title"));
                }
            }
        }
        private decimal _price;
        public decimal Price
        {
            get
            {
                return _price;
            }
            set
            {
                _price = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Price"));
                }
            }
        }
    }

　　

代码很简单，重点在于实体类要实现INotifyPropertyChanged