C# Binding之 DataContext 测试

<Window x:Class="WpfApp2.BindingTest5"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp2"
        mc:Ignorable="d"       
        Title="BindingTest5" Height="135" Width="300">
    <StackPanel Background="LightBlue" Name="sPanel1">
        <!--<StackPanel.DataContext>
            <local:Student Id="6" Age="29" Name="Tim"/>
        </StackPanel.DataContext>-->
        <Grid x:Name="grid1">
            <StackPanel>
                <TextBox x:Name="textBox1" Text="{Binding Id}"/>
                <TextBox x:Name="textBox2" Text="{Binding Name}"/>
                <TextBox x:Name="textBox3" Text="{Binding Age}"/>
                <TextBox x:Name="textBox4" Text="{Binding WorkYear}"/>
            </StackPanel>
        </Grid>
    </StackPanel>
</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 WpfApp2
{
    /// <summary>
    /// BindingTest5.xaml 的交互逻辑
    /// </summary>
    public partial class BindingTest5 : Window
    {
        public BindingTest5()
        {
            InitializeComponent();

            Student student = new Student() { Age=100, Id=1, Name="Lucy"};
            Teacher teacher=new Teacher() {  WorkYear=20};
            this.sPanel1.DataContext = student;
            this.grid1.DataContext = teacher;
            textBox1.BorderBrush = null;
        }
    }
    public class Student
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
    }
    public class Teacher
    {
        public int WorkYear { get; set; }
    }
}

结果如下：

结论：如果没有显示给DataContext赋值，那么它会从父节点继承。 并不是根据Path的属性名来向上寻找对应的DataContext。

经调试发现：四个TextBox的DataContext均为 teacher 。