WPF RelativeSource

 

 

<Window x:Class="WpfDemo.RelativeSourceDemo"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="RelativeSourceDemo" Height="300" Width="300">
    <Grid x:Name="G1">
        <StackPanel x:Name="S1">
            <Grid Margin="20" x:Name="G2">
                <StackPanel x:Name="S2">
                    <TextBox Margin="20" x:Name="textBox" Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type StackPanel},AncestorLevel=1},Path=Name}" Height="150" ToolTip="1111"/>
                </StackPanel>
            </Grid>
        </StackPanel>
    </Grid>
</Window>

　　

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Shapes;

namespace WpfDemo
{
    /// <summary>
    /// RelativeSourceDemo.xaml 的交互逻辑
    /// </summary>
    public partial class RelativeSourceDemo : Window
    {
        public RelativeSourceDemo()
        {
            InitializeComponent();
            //当有明确的数据源时，我们通过 source=。。。 绑定数据
            //但是如果没有明确的对象名称，但是知道 这个对象 与绑定的对象在UI布局上有对象关系

            //RelativeSource rs = new RelativeSource(RelativeSourceMode.FindAncestor);

            //rs.AncestorLevel = 1; 
            //rs.AncestorType=typeof(Grid);
            //// 从自己的第一层向外寻找 第一个 Grid 对象
            //this.textBox.SetBinding(TextBox.TextProperty, new Binding("Name") { RelativeSource = rs });//G2

            //或者XAML 里面绑定
            // Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type Grid},AncestorLevel=1},Path=Name}"
            //rs.AncestorLevel = 2;
            //rs.AncestorType = typeof(Grid);
            //// 从自己的第一层向外寻找 第一个 Grid 对象
            //this.textBox.SetBinding(TextBox.TextProperty, new Binding("Name") { RelativeSource = rs });//G1


            // 同时 还可以绑定自身的属性

            RelativeSource rs = new RelativeSource(RelativeSourceMode.Self);
            this.textBox.SetBinding(TextBox.TextProperty, new Binding("Name") { RelativeSource = rs });


        }
    }
}