默认为双向绑定

    1. <Grid ShowGridLines="True">
    2.         <StackPanel>
    3.             <Slider x:Name="slider" Width="200"/>
    4.             <TextBox Text="{Binding ElementName=slider,Path=Value}"/><!--查找数据绑定的路径为Value-->
    6.         </StackPanel>
    7.     </Grid>

    绑定到模板上

    1.  <Window.Resources>
    2.         <TextBox x:Key="txt">Hello</TextBox>
    3.     </Window.Resources>
    4.     <Grid ShowGridLines="True">
    5.         <StackPanel>
    6.             <TextBox Text="{Binding Source={StaticResource txt},Path=Text}"/>
    7.         </StackPanel>
    8.     </Grid>

    DataContext数据上下文
    前台代码：

    1.  <Grid ShowGridLines="True">
    2.         <StackPanel>
    3.             <TextBox x:Name="txt" Text="{Binding Name}"/>
    4.         </StackPanel>
    5.     </Grid>

    后台代码

    1.  public partial class MainWindow : Window {
    2.         public MainWindow() {
    3.             InitializeComponent();
    4.             txt.DataContext = new Person() { Name = "Jack" };
    6.         }
    7.     }
    9.     public class Person {
    10.         public string Name { get; set; }
    11.     }