WPF学习(1)：控件之间的数据绑定

A控件的值绑定到B控件上的属性上

<Window x:Class="TestMVVM.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml

DataContext="{BindingElementName=scrollBar1}"  写在这也是没问题的

        Title="MainWindow" Height="350" Width="525" >

    <Grid DataContext="{Binding ElementName=scrollBar1}" >

        <ScrollBar Height="17" HorizontalAlignment="Left" Margin="26,12,0,0" Name="scrollBar1" VerticalAlignment="Top" Width="424" Orientation="Horizontal" SmallChange="1" Maximum="100" />

        <!--<TextBox DataContext="{BindingElementName=scrollBar1}" Text="{BindingPath=Value,Mode=Default}" Height="23"HorizontalAlignment="Left" Margin="26,44,0,0"Name="textBox1" VerticalAlignment="Top"Width="120" />-->

        <TextBox Text="{Binding Path=Value,Mode=Default,UpdateSourceTrigger=PropertyChanged}" Height="23" HorizontalAlignment="Left" Margin="26,44,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" />

        <TextBox Text="{Binding Path=Value,Mode=Default}" Height="23" HorizontalAlignment="Left" Margin="152,44,0,0" Name="textBox2" VerticalAlignment="Top" Width="120" />

    </Grid>

</Window>

UpdateSourceTrigger=PropertyChanged：的意思是当属性值一改变，相关绑定同时改变。WPF可以控制变化发生的时刻。