binding 里面local的用法

<Window x:Class="WpfApp4.MainWindow"
        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:WpfApp4"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <StackPanel Background="LightBlue">
        <StackPanel.DataContext>
            <local:Student Id="6" Age=" 29" Name="TIm"/>
            <!--StackPanel里面包着local,local根据xmnls指定的路径寻找到Student-->
        </StackPanel.DataContext>
        <Grid>
            <StackPanel>
                <TextBox Text="{Binding Path = Id }" Margin="5"/>
                <TextBox Text="{Binding Path = Name }" Margin="5"/>
                <TextBox Text="{Binding Path = Age }" Margin="5"/>
            </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.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;

namespace WpfApp4
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    /// 

    public partial class MainWindow : Window
    {

        public MainWindow()
        {
 
            InitializeComponent();

            

        }
        public static string str1 = "";

    }

    public class Student
    {

        public int Id

        {
            set;
            get;
        }

        public string Name
        {
            set;
            get;
        }

        public int Age
        {

            set;
            get;
        }
    }
}